vbseries reference guide

SCOUT & vbSeries

Instrument Reference Guide

SCOUT100-Ex, SCOUT140-Ex

Vb5, vb6, vb7, vb8

12 August 2014

GE Measurement & Control

COPYRIGHT 2014 Bently Nevada, Inc & GE Energy (New Zealand) Ltd. All rights reserved

No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopy, recording or otherwise without the prior written permission of Bently Nevada.

The information provided in this document is subject to change without notice. Names and data used in examples are fictitious unless otherwise noted. This document is distributed as is, without warranty of any kind, either expressed or implied, respecting the contents of this document, including but not limited to implied warranties for the documents quality, performance, merchantability, or fitness for any particular purpose. Neither GE Energy (New Zealand) Ltd, nor its employees, dealers, agents or distributors shall be liable to the user of this document or any other person or entity with respect to any liability, loss or damage caused or alleged to be caused directly or indirectly by this document.

Trademarks

* Denotes a trademark of Bently Nevada, Inc., a wholly owned subsidiary of General Electric Company.

The following are trademarks of the legal entities cited: PROFLASH* is a trademark of Bently Nevada, Inc. Commtest* and Ascent* are registered trademarks of GE Energy (New Zealand) Ltd.

Other trademarks and registered trademarks are the property of their respective owners.

Printed in New Zealand. Uncontrolled when transmitted electronically.

GE Measurement & Control

Additional Information

This manual does not contain all the information required to operate and maintain the product. Refer to the Ascent Reference Guide for the required information (available from Help menu in Ascent).

Product Disposal Statement

Customers and third parties, who are not member states of the European Union, who are in control of the product at the end of its life or at the end of its use, are solely responsible for the proper disposal of the product. No person, firm, corporation, association or agency that is in control of product shall dispose of it in a manner that is in violation of any applicable federal, state, local or international law. GE Energy (New Zealand) Ltd is not responsible for the disposal of the product at the end of its life or at the end of its use.

Section 1 Introduction

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Contents

SECTION 1 INTRODUCTION ....................................................................... 1

FLEX FEATURES ...........................................................................................................................2 PRECAUTIONS..............................................................................................................................4 HAZARDOUS LOCATIONS ..........................................................................................................6 CSA Certification vbSeries Instruments ..........................................................6 IECEx / ATEX Certification SCOUT Instruments ...........................................8

INSTRUMENT CONNECTIONS ................................................................................................. 11 FRONT PANEL BUTTONS ........................................................................................................ 12 LED INDICATORS ..................................................................................................................... 13 CHARGE BATTERY PACK ......................................................................................................... 14 BATTERY FEATURES ................................................................................................................. 15 REMOVE BATTERY PACK ......................................................................................................... 16 CABLE TEST .............................................................................................................................. 17 OPERATING OVERVIEW ........................................................................................................... 18 Onsite Analysis .............................................................................................................. 19 Recording Routes ......................................................................................................... 20 Balancing ......................................................................................................................... 21 Keypad Entry .................................................................................................................. 22

SECTION 2 INSTRUMENT FUNDAMENTALS ........................................... 23

SWITCH INSTRUMENT ON OR OFF ....................................................................................... 23 USE MAIN MENU ..................................................................................................................... 24 RETURN TO PREVIOUS MENU ................................................................................................ 24 USE NAVIGATION KEYS AND ICONS ..................................................................................... 24 SELECT MENU ITEMS............................................................................................................... 26 Select Option .................................................................................................................. 26 Jump To End of List ..................................................................................................... 26 Scroll through Multi-column List .......................................................................... 27 Cancel Option ................................................................................................................ 27 Display Hint Labels and Detailed Help .............................................................. 28 Display Alternative Options..................................................................................... 30 Enter Characters........................................................................................................... 31 Example Rename Folder ..................................................................................... 32

ADDITIONAL ICONS ................................................................................................................. 34

SECTION 3 SENSORS ................................................................................. 35

CONNECT SENSOR TO INSTRUMENT .................................................................................... 35 MOUNT SENSOR ...................................................................................................................... 35


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SET UP ACCELEROMETER........................................................................................................ 36 Permanent Mounting ................................................................................................. 37

SET UP TACHOMETER .............................................................................................................. 38 TACHOMETER SIGNAL FROM KEYPHASOR ........................................................................ 40 Manual Keyphasor Threshold settings .............................................................. 42

USE STROBE LIGHT ................................................................................................................. 45

SECTION 4 MEASUREMENT TYPES AND THEIR USES ........................... 46

SPECTRUM ................................................................................................................................ 46 Strobe Output................................................................................................................. 48

Read Speed of Connected Strobe ........................................................................ 50 WAVEFORM .............................................................................................................................. 51 DEMODULATION ...................................................................................................................... 52 Analyze Demodulation Data .................................................................................. 54

DEMOD SPECTRUM ................................................................................................................. 55 6PACK ....................................................................................................................................... 55 Streamlined Parameter Settings .......................................................................... 56 6Pack Demodulation Processing ......................................................................... 57

TACHOMETER DISPLAY ........................................................................................................... 58 TIME SYNCHRONOUS AVERAGING ........................................................................................ 59 BUMP TEST ............................................................................................................................... 60 COAST-DOWN/RUN-UP ......................................................................................................... 61 Tips for Coast-down/Run-up recordings.......................................................... 61 Deactivate Saving Waveform Data for Coast-down/Run-up Measurement ................................................................................................................. 62 Take Coast-down/run-up Measurement.......................................................... 63

CROSS CHANNEL PHASE ........................................................................................................ 64 Recommendations for Cross Channel Phase................................................. 65 Fault Types and their Phase Relationships ..................................................... 66 Measuring Cross Channel Phase.......................................................................... 69 Setup .................................................................................................................................. 69 Measure Cross Channel Phase .............................................................................. 70 1 Plan Cross Channel Spectrum (ODS) Recording Routine ................ 71 2 Setup ......................................................................................................................... 72 3 Take Cross Channel Spectrum (ODS) Recording ................................. 75 4 Review Data .......................................................................................................... 77

REVIEW DATA IN ODS SOFTWARE ....................................................................................... 78 LONG TIME WAVEFORMS ....................................................................................................... 80 Measure Long Time Waveforms........................................................................... 80 View Long Time Waveforms on Computer ..................................................... 82

ORBIT PLOT .............................................................................................................................. 83 Use Orbit Plot Measurement Mode ..................................................................... 86


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Take Orbit Plot Measurement on Route ............................................................ 88 MODAL IMPACT TESTING........................................................................................................ 89 1 Plan Impact Test Routine ................................................................................ 90 2 Setup ......................................................................................................................... 90 3 Perform Trial Impact ......................................................................................... 93

Disable Warning Messages .................................................................................... 95 4 Perform Actual Modal Impact Test ............................................................ 95

Specify Locations and Directions for Saved Impacts..................................... 97 5 Review Data .......................................................................................................... 98

KEYPAD ENTRY ......................................................................................................................... 99 ORDER TRACKING................................................................................................................. 101 Take Order Tracked Measurement ................................................................... 102

AVERAGE VALUE MEASUREMENTS .................................................................................... 106 TAKE MULTI-CHANNEL SIMULTANEOUS MEASUREMENTS ............................................ 106 Set up Sensors and Channels ............................................................................. 107 Save Multi-channel Measurements ................................................................. 108

SECTION 5 SET MEASUREMENT OPTIONS ........................................... 110

SET MEASUREMENT UNITS AND SPECTRUM SCALING ................................................... 110 SET MEASUREMENT PARAMETERS ..................................................................................... 112 CREATE YOUR OWN PARAMETER SETS.............................................................................. 114 ASSIGN SENSORS TO CHANNELS ....................................................................................... 115 SPECTRUM PARAMETERS ..................................................................................................... 116 Fmax ................................................................................................................................ 117 Spectral Lines .............................................................................................................. 118 Fmin ................................................................................................................................. 118 Tach Trigger ................................................................................................................. 118 Averaging ...................................................................................................................... 118

Number of Averages ............................................................................................... 119 Averaging Types ....................................................................................................... 119 Average Overlap....................................................................................................... 119

Windowing ................................................................................................................... 120 Choose Window Type ............................................................................................. 120

WAVEFORM PARAMETERS................................................................................................... 120 Equivalent Fmax ........................................................................................................ 121 Number of Samples ................................................................................................. 121 Duration ......................................................................................................................... 121

ADDITIONAL MEASUREMENT PARAMETERS ..................................................................... 121

SECTION 6 TAKE RECORDINGS ............................................................. 122

WALKTHROUGH TAKE RECORDINGS............................................................................ 122 TAKE INDIVIDUAL AND MULTIPLE RECORDINGS.............................................................. 123 Individual recording ................................................................................................. 123


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Multiple recording ..................................................................................................... 123 SAVE RECORDINGS ............................................................................................................... 124 REVIEW RECORDING ............................................................................................................ 125 Review Current Recording .................................................................................... 125 Review Stored Recording ...................................................................................... 126

DELETE RECORDING ............................................................................................................. 127 ATTACH NOTE ....................................................................................................................... 127 BASELINE RECORDINGS ....................................................................................................... 128

SECTION 7 ANALYZING MEASUREMENTS ONSITE ............................. 129

TIPS FOR TAKING MEASUREMENTS ................................................................................... 130 WALKTHROUGH TAKE MEASUREMENT ........................................................................ 131 CHANGE DEFAULT MEASUREMENT SETTINGS ................................................................. 133 CHARTS .................................................................................................................................. 134 ANALYZE MEASUREMENTS.................................................................................................. 135 Cursors ........................................................................................................................... 136 Show or Hide Harmonics ...................................................................................... 138 Zoom ............................................................................................................................... 139

VIEW MULTIPLE CHARTS ..................................................................................................... 140 Select Chart .................................................................................................................. 140 Display Single Chart................................................................................................. 140

CHANGE CHART VIEW ......................................................................................................... 141 Select Chart Layout .................................................................................................. 141

Change Multi-chart Layout Display ................................................................... 141 SET Y AXIS (AMPLITUDE) SCALE ......................................................................................... 142 Fixed Y Axis scale options ..................................................................................... 143

AMPLITUDE DISPLAY UNITS ................................................................................................ 144 vdB ................................................................................................................................... 145 adB ................................................................................................................................... 145

SET RPM ............................................................................................................................... 145 Enter RPM manually ................................................................................................ 145 Enter RPM using 1X peak ...................................................................................... 146

VIEW ORDERS ....................................................................................................................... 147 VIEW REVOLUTIONS ............................................................................................................. 148 SAVE MEASUREMENT ........................................................................................................... 148 Save to Existing Machine ...................................................................................... 149 Save to New Machine ............................................................................................. 150

CHANGE SCREEN CONTRAST WHILE IN MEASURE MODE ............................................ 151

SECTION 8 SEND AND RECEIVE INFORMATION ................................. 152

TRANSFER RECORDINGS FROM INSTRUMENT TO ASCENT ............................................. 152 TRANSFER FOLDERS FROM ASCENT TO INSTRUMENT .................................................... 154


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Resend Updated Folder ......................................................................................... 155 Retain Stored Recordings ...................................................................................... 155 Retain Baseline Recordings on Instrument ..................................................... 155

SYNCHRONIZE TIME ZONE ON INSTRUMENT AND COMPUTER ..................................... 156 EXPORT OR IMPORT DATA USING USB FLASH DRIVE .................................................... 157 Export Data using USB Flash Drive .................................................................. 158 Import Data using USB Flash Drive.................................................................. 159

REMOTE COMMS FUNCTIONALITY ...................................................................................... 159 Receive Data from Remote Comms Server .................................................. 160 Send Data from Instrument to Remote Comms Server ......................... 161

CONNECT TO WI-FI NETWORK .......................................................................................... 162 Set up wireless network ........................................................................................ 163 Connect instrument to wireless network ...................................................... 165 Specify preferred wireless connection ........................................................... 166 Using Wi-Fi with your smart phone ................................................................. 167

UFF EXPORT ......................................................................................................................... 168

SECTION 9 WORKING WITH ROUTES ................................................... 169

WHAT IS A ROUTE? .............................................................................................................. 169 WALKTHROUGH TAKE RECORDINGS USING ROUTE .................................................. 170 USE BAND ALARMS AND BASELINE OVERALLS ON ROUTE ........................................... 173 View Alarm Bands Configured in Ascent....................................................... 175

RECORD MULTIPLE CHANNELS ON ROUTE ...................................................................... 176 Axis Mode ...................................................................................................................... 177 Point Mode ................................................................................................................... 178 Complete Setup.......................................................................................................... 179

TRIAXIAL MEASUREMENTS .................................................................................................. 179 ENTER MACHINE SPEED ON ROUTE .................................................................................. 182 View Machine and Point Speed Details.......................................................... 184

SKIP ROUTE ENTRIES AND MACHINES .............................................................................. 184 LOCATE SKIPPED ROUTE ENTRIES ..................................................................................... 185 TRACK PROGRESS THROUGH ROUTE ................................................................................ 186 SAVE ROUTE RECORDING ................................................................................................... 187 Select Save mode for recording ......................................................................... 188 Select Recording to Review .................................................................................. 189

RETAKE RECORDING ............................................................................................................ 190 DELETE ROUTE RECORDING ............................................................................................... 191 TAKE OFF-ROUTE RECORDING .......................................................................................... 192 EDIT OR DELETE ROUTE....................................................................................................... 192

SECTION 10 CREATE, EDIT, AND DELETE ITEMS ................................. 193

STORAGE CAPACITY AND RECORDING VOLUME.............................................................. 193


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ORGANIZE AND STORE RECORDINGS ................................................................................ 194 FOLDERS ................................................................................................................................ 196 Create Folder ............................................................................................................... 196 Change Selected Folder ......................................................................................... 196 Rename Folder ........................................................................................................... 196 Delete Folder ............................................................................................................... 197 Restore Deleted or Overwritten Folder ........................................................... 197

MACHINES ............................................................................................................................. 198 Create Machine Structure ..................................................................................... 199 Create Parameter Set.............................................................................................. 200 Change Sensor ........................................................................................................... 201 Add Structure to Existing Machine ................................................................... 201 Copy Machine Structure ........................................................................................ 202 Rename Machine Structure ................................................................................. 203 Delete Machine Structure...................................................................................... 204

SENSORS ................................................................................................................................ 205 Define or Edit Sensors ............................................................................................. 205 Bias Voltage Check ................................................................................................... 207 Set Default Sensor .................................................................................................... 208

Change Sensor Temporarily ................................................................................. 209 Change Default Sensor .......................................................................................... 209

Delete Sensor .............................................................................................................. 209 NOTES .................................................................................................................................... 209 Create Note .................................................................................................................. 210 Edit Note ........................................................................................................................ 210 Attach Note .................................................................................................................. 211 View Note ...................................................................................................................... 211 Detach Note ................................................................................................................. 211 Delete Note Permanently ...................................................................................... 212

DELETE ALL RECORDINGS IN FOLDER ............................................................................... 212 DELETE ALL STORED INFORMATION .................................................................................. 213

SECTION 11 BALANCING ROTORS ........................................................ 214

METHODS FOR BALANCING ROTORS ................................................................................ 214 BALANCING PROCESS .......................................................................................................... 215 BALANCING TIPS ................................................................................................................... 216 TACHOMETER ........................................................................................................................ 216 SUGGESTED TRIAL WEIGHT MASS AND LOCATION ........................................................ 217 MANUALLY ENTER BALANCING DATA............................................................................... 217 SET UP BALANCING JOB...................................................................................................... 218 Balance Planes and Weight Positions ............................................................ 219

Balance Planes ......................................................................................................... 219


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Weight Position (Reference Mark) ....................................................................... 219 # Sensors....................................................................................................................... 221

Channel Position ...................................................................................................... 222 Averages ........................................................................................................................ 223 Machine Information ............................................................................................... 224

Rotor Weight, Diameter, and Speed .................................................................. 224 Reference Mark......................................................................................................... 225

Filter Bandwidth ........................................................................................................ 226 Weight Orientation ................................................................................................... 226 Tach Trigger ................................................................................................................. 227 Weight Lin Dist ........................................................................................................... 227 Store Units .................................................................................................................... 227

COMBINE AND SPLIT TRIM WEIGHTS ................................................................................ 227 Combine/Adjust Weights ...................................................................................... 228 Split Weight .................................................................................................................. 229

ADJUST WEIGHTS FOR NEW RADIUS LOCATION ............................................................ 231 REVIEW PREVIOUS BALANCING JOBS ............................................................................... 232

SECTION 12 BALANCING WALKTHROUGH .......................................... 233

STEP 1 SET UP NEW BALANCE JOB ............................................................................. 234 STEP 2 TAKE INITIAL READING ...................................................................................... 235 STEP 3 TAKE TRIAL READING ........................................................................................ 237 STEP 4 BALANCE ROTOR................................................................................................ 240 STEP 5 PERFORM TRIM BALANCING ............................................................................ 241 STEP 6 VIEW OR SAVE BALANCING JOB ..................................................................... 242 Save balance job ....................................................................................................... 243

SECTION 13 GENERAL SETUP OPTIONS ............................................... 244

SET DATE AND TIME ............................................................................................................. 244 Adjust Date or Time Format................................................................................. 245

SELECT LOCAL TIME ZONE .................................................................................................. 245 DAYLIGHT SAVING AUTOMATIC ADJUSTMENT ................................................................ 246 ADJUST SOUND VOLUME.................................................................................................... 247 SET INSTRUMENT LANGUAGE ............................................................................................. 247 ADJUST SCREEN CONTRAST ............................................................................................... 247 SWITCH BACKLIGHT ON/OFF ............................................................................................ 248 ESTIMATE REMAINING OPERATING TIME .......................................................................... 248 CONSERVE BATTERY POWER .............................................................................................. 249 Set Backlight Timeout ............................................................................................. 249 Set Sleep Mode Timeout ........................................................................................ 250

Change Default Sleep Mode Timeout ................................................................ 250 Switch Instrument On ............................................................................................. 250

Set Complete Powerdown Timeout ................................................................. 251


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MANAGE INSTRUMENT MEMORY ....................................................................................... 251 Check Available Memory ....................................................................................... 252 Instrument Memory Warnings ........................................................................... 252 80% Memory Capacity Warning ....................................................................... 253

95% Memory Capacity Warning ......................................................................... 254 100% Memory Capacity Warning ...................................................................... 254

Free up Instrument Memory ................................................................................ 255 Reformat Memory Card ......................................................................................... 256 Empty Recycle Bin .................................................................................................... 257 Overwrite Primary Database with Mirror Backup .................................... 258

DISPLAY SYSTEM INFORMATION ........................................................................................ 259 UNLOCKABLE FEATURES ..................................................................................................... 260 UPGRADE INSTRUMENT FIRMWARE PROFLASH ......................................................... 261 PROFLASH PROCEDURE ....................................................................................................... 262

SECTION 14 TROUBLESHOOTING .......................................................... 263

RESET INSTRUMENT ............................................................................................................. 263 TROUBLESHOOT NETWORK COMMUNICATIONS ............................................................. 264 Set Ethernet Network Address ........................................................................... 265

Reset Network Values to Factory Default ........................................................ 265 ETHERNET CONNECTION LOST IN WINDOWS VISTA ...................................................... 266

INDEX ............................................................................................................. 267


1


You can use this Reference Guide in conjunction with the Ascent Reference Guide. Please read this guide before operating your Bently Nevada SCOUT or Commtest vbSeries Portable Vibration Analyzer and keep it for future reference. This guide applies to the following instrument models:

SCOUT100-Ex SCOUT140-Ex vb5 vb6 vb7 vb8

Although this guide makes use of common vibration analysis and balancing concepts, it is not intended as a comprehensive guide or training manual. Please ensure you have the relevant knowledge and experience to carry out the procedures described. It is essential to follow all appropriate safety precautions when working near rotating machinery.


2

Flex Features

Some of the features available with the 2013 release are included by default for some new models, and available for purchase with other older models. When you purchase an additional Flex feature, you will receive a license for it which you can activate via Ascent.

If you purchase a Flex feature, you can easily review the licensing status of these at any time. To do this:

1. Press Options.

2. Press Model + Features.

MORE: Contact your local sales representative to arrange a license for a feature you wish to add.

MORE: Refer to your Ascent Reference Guide to learn how to apply our license in Ascent.

Checking the licensing details for any additional features


3

Some older instruments are not automatically compatible with Flex features. To check whether your instrument is currently configured to support the addition of Flex features:

1. Press Options.

2. Press Memory & System The Flex Capable listing at the bottom of the screen indicates either Yes or No.

MORE: Contact Commtest Support if your instrument is currently not set up to support Flex features.

Determining whether your instrument is currently set up to

support the addition of Flex features


4

Precautions

Ensure you read and understand this section before operating your instrument. Pay attention to all warnings and recommendations to prevent data loss, data inaccuracy, damage to the instrument, or injury to you.

Do NOT attach sensors to any object with a high potential voltage I.e. a voltage that exceeds 50 V DC or 32 V AC or the Safety Extra Low Voltage (SELV) defined by your local power authority.

Ensure the cables and neck strap cannot become entangled with any rotating or moving machinery.

Do NOT bring any objects that are sensitive to magnetic fields near the magnetic mounting bases (e.g. cardiac pacemakers, credit cards, floppy disks, video tapes, audio cassette tapes, or mechanical watches).

Explosion Hazard When working in a hazardous area with risk of flammable gases, all precautions and limitations explained in the following Hazardous Locations section must be followed.

Do NOT detach the battery pack from the instrument for more than 10 minutes. This will erase the instrument's date and time (it will retain all recordings and other information).

Neck straps must be connected to the instrument using the 2.5 turn stainless steel rings provided. The strap must NOT be connected directly to the unit. This will defeat the 10 kg safety release provided by the rings. Replacement rings are available.


5

Only use an approved power adapter 12 V 3 A output, center positive. Do NOT use the plug-pack transformers supplied with previous instrument versions. Doing so will damage these transformers.

The cover over the comms and charger connectors provides an essential seal. The cover must be in place whenever you use the instrument in an industrial environment. Failure to comply with this requirement might void your warranty. IP65 rating only applies while the cover is securely in place.

Transfer information stored in the instrument to a PC before reprogramming (PROFLASHING) the instrument with new firmware. PROFLASHING the instrument will delete all stored information.

To obtain accurate measurements, ensure the drive current is switched on when using an IEPE/ICP-type accelerometer.

Mount the sensor correctly before taking measurements. This will ensure your readings are accurate and consistent.

Use a mild detergent diluted with warm water to clean your instrument. Do NOT use abrasive or polishing substances, hydrocarbons, petrochemicals, or solvents, as these will degrade the plastic casing.

Do NOT place the instrument or magnetic mounting base where the temperature might exceed 140F (60C). This will degrade the battery pack and magnet.

If your instrument malfunctions, return it to an authorized dealer. Do NOT attempt to repair the instrument yourself as this will void your warranty.


6

Hazardous Locations

SCOUT and vbSeries instruments are rated differently for hazardous environments SCOUT instruments hold an IECEx/ATEX rating, while vbSeries instruments are CSA-certified.

CSA Certification vbSeries Instruments

Your Portable Vibration Analyzer has been approved by the Canadian Standards Association (CSA) for use in hazardous locations that meet the following classifications Class I; Division 2; Groups A, B, C, and D.

These instruments are clearly identified with the CSA logo and a Hazardous Locations information panel. The Class I Division 2 classification is officially defined in the Canadian Electrical Code, part 1. In summary, it is a location in which volatile flammable gases or vapors are present but confined within closed systems from which they can escape only in case of accidental rupture or abnormal operation; or in which ignitable concentrations of gases are normally prevented by positive pressure or mechanical ventilation, and which might become hazardous through abnormal operation of the ventilation equipment.

The approval specifically covers use in the United States of America and any other countries which recognize the CSA certification.

When using a certified instrument in a hazardous location, the installation must comply with the Installation Control Drawing for Hazardous Locations, including all its footnotes and warnings.

Your instrument will be supplied, complete with appropriate sensors for use in Class I Division 2 environments. As indicated in the diagram, you can use alternative sensors, provided these are certified for use in these locations, and provided their entity parameters meet the limits shown in the drawing.


7

Installation Control Drawing for Hazardous Locations


8

IECEx / ATEX Certification SCOUT Instruments

SCOUT100-Ex and SCOUT140-Ex portable vibration analyzers are IECEx /

ATEX certified Identified by the logo on the rear instrument label.

If you need to use your instrument in hazardous areas, please ensure it is the appropriate variant for your country. Refer to the following pages for the hazardous area usage instructions.

The logo on the rear label indicates your instrument has been approved for use in hazardous locations with the following classification:

II 3 G Ex ic IIB T4 Gc

Group II = non-mining Category 3 = Zone 2 Atmosphere G = Gas Protection method ic = intrinsic safety for zone 2 Explosion Group IIB = gases such as Ethylene Temperature Class T4 = surface will not exceed 135C Protection level c = Zone 2

The approval covers use in Europe (under ATEX) and any other countries that recognize the IECEx certification.

When using a certified instrument in a hazardous location, the installation must comply with the following Installation Control Drawing for ATEX Hazardous Locations GE2214VBX , including all its footnotes and warnings.

Your instrument will be supplied, complete with appropriate sensors for use in Zone 2 environments. As indicated in the following drawing, you can use alternative sensors, provided these are certified for use in these locations, and provided their entity parameters meet the limits shown in the drawing.


9

Installation Control Drawing GE2214VBX for ATEX Hazardous Locations


10

IECEx / ATEX Declaration of Conformity


11

Instrument Connections

The top panel of the instrument is equipped with the following connectors:

Top panel

Label number

Feature Description

1 Ethernet port Connects to a standard 8P8C (RJ45) male plug terminator

2 USB host port Connects to an external USB memory device for data import and export

MORE: See Export/Import Data via an External USB Flash Drive.

3 USB socket Provides a data connection between the instrument and an Ascent software host computer

4 Charger power socket (12 Volt 3 Amp input)

Enables you to power the instrument and charge the its battery pack

5 BNC sensor input Channel 1

6 BNC sensor input Channel 2

7 LEMO four-pin tachometer input

IMPORTANT! Ensure the protective rubber cover is securely fastened over the instrument communication ports while you collect data in the field. Failure to do this may void your warranty. The IP65 rating only applies while the rubber cover is securely fastened.


12

Front Panel Buttons

The table outlines the functions of the buttons on the front panel of your instrument.

Switch the instrument On/Off.

Cancel/Go Back A long press takes you back to the main menu.

Accept/Go Forward to the next menu.

Activate alternate functions for each key In some menus, keys can perform several functions. To see the available options, press ALT and toggle the key functions.

Help key Access easy-to-see hint labels. A long press displays detailed contextual help text.

Navigate up/down through a list Press and hold to move more rapidly through a list.

Navigate left/right Expands and collapse a level in the navigator and directs movement between split-screen menus (e.g. Record Review menu).

Buttons on front panel of your instrument


13

LED Indicators

There are five LED indicators on the front panel of your instrument. These indicate the instrument's current state and warn you of any measurement problems.

Instrument LEDs

Power supply (GREEN)

Illuminates when power is supplied to the instrument from the power adapter.

Charging (RED) Indicates the instrument battery is charging.

Danger (RED)

Illuminates when: A DSP or critical error occurs. A measurement is less than 25% or greater than

200% of the preset baseline value.

MORE: See Baseline Recordings.

The sensor bias voltage is outside the specified range.

Alert (AMBER)

Illuminates when a measurement is less than 50% or greater than 150% of the preset baseline value.

OK (GREEN) Indicates that a measurement is being, or has been, collected successfully. No error or alert has been triggered.


14

Charge Battery Pack

To charge your battery pack:

1. Ensure the power adapter you are using is suitable (i.e. 12 Volt, 3 Amp output, center positive).

NOTE: The power adapter supplied with your instrument has the correct DC voltage.

2. Connect the AC power adapter included with your instrument to a powered outlet (100-240 Volt, 50/60 Hz).

NOTE: You can also use the optional car adapter charging lead to charge the battery pack in a vehicle with a 12 V negative-chassis power system.

3. Connect the adapter's DC output to your instrument's charger power socket The instrument's Power Supply and Charging LED indicators illuminate to indicate that the instrument is charging.

NOTE: The battery will be fully charged in approximately 3 hours.

NOTE: Ensure you charge the fast-charge Lithium Ion battery pack for at least 1 hour before or during its initial use.


15

Battery Features

Your instrument is powered by a rechargeable custom Lithium Ion battery pack with a normal operating range of 6.5 - 8.4 V.

It is equipped with an internal backup energy source to protect your data and settings in case the battery pack is momentarily removed from the instrument. The backup remains charged by the battery pack, provided the battery is functioning correctly. Your instrument includes a number of features that help ensure the battery pack is always sufficiently charged.

The table outlines the battery behavior in its different states.

Battery state Behavior

Below 7 Volts Instrument automatically switches off the back light to prevent further power drainage. It displays a flashing battery icon to indicate the battery needs to be recharged.

At 6.5 Volts Instrument automatically powers down.

Charge of 25% or less Instrument enters Complete Powerdown mode when powered off (rather than Sleep mode).


16

Remove Battery Pack

To remove the battery pack from your instrument:

1. Use a 2 x Phillips head to loosen the screws that attach the battery cover to the bottom panel of the instrument.

2. Set the battery cover aside and extract the battery.

WARNING! Do NOT detach the battery pack from the instrument for more than 10 minutes. This will cause the instrument date/time to be reset. Stored measurement data or recordings will NOT be lost.

WARNING! Ensure power is NOT supplied to the instrument when you remove the battery. Unplug any connected power adapters before removing the battery.

WARNING! You should NOT re-insert a damaged battery in your instrument. Dispose of damaged batteries responsibly and in accordance with local regulations. Do NOT disassemble the battery or use fire to dispose of it. Replacement batteries are available from authorized distributors (part number BATT0206).


17

Cable Test

To display a live bias voltage graph of all connected channels and determine whether your sensors and cables are working correctly:

1. Secure your sensor so that it does not move You could attach it to a machine that is not running or hold it with a clamp.

2. Press or Measure. 3. Use the navigation keys provided to scroll down and select Cable

Test.

4. Press The current voltage displays in real time. 5. Move the cable joints to determine whether there is an intermittent

short: Consistent data (e.g. a straight line) indicates the cable is

working correctly. Varying data (e.g. a varying line) indicates there is a problem

with the cable.

TIP: You can view the data that displays for a particular channel in

more detail. To do this, press to toggle and select the channel

you wish to view > Press to access an enlarged view of the data.

NOTE: You can run a cable test for any standard sensor that is supported by your instrument, including accelerometers, velocity sensors, and proximity probes.

Cable test reveals sensor is functioning correctly


18

Enlarged view of selected channel reveals problematic sensor connection

Operating Overview

You can use your instrument to: Take live, free run measurements for onsite analysis of vibration

spectra and waveforms. Record routes and store vibration data for transfer to a PC (off-

site analysis). Use keypad entry to enter additional machine information and

process inputs. Balance machines using single and dual plane methods.


19

Onsite Analysis

You can use your instrument to measure vibration spectra and waveforms. You can then analyze your data onsite immediately. This is ideal for one-off investigations that fall outside your regular scheduled monitoring route.

To do an onsite analysis:

1. Set measurement parameters on your instrument. 2. Measure and analyze the spectrum or waveform. 3. Record the data to memory (optional). 4. Transfer the data to your computer for further analysis (optional).

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20

Recording Routes

You can take vibration recordings for all monitored machines and transfer these to your computer for analysis.

Your instrument can guide you through a predefined data recording sequence known as a route. You can create a route on your computer and transfer it to your instrument.

Recording routes is particularly useful if you routinely monitor a large number of machines. It enables you to build up a history of machine states and conditions over time.

To record a route:

1. Create a recording route on your computer.

MORE: See the Ascent Reference Guide for instructions.

2. Transfer the route to your instrument. 3. Collect data for each item on the recording route as prompted by

your instrument. 4. Transfer the collected data to your computer for further analysis.

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21

Balancing

Depending on your instrument, you can analyze and correct rotating mass imbalance problems where they occur. A rigid rotor can be balanced in one or two planes. To address a balancing problem where it occurs:

1. Take an initial measurement of the imbalance. 2. Attach a trial weight to the balancing plane. 3. Take another measurement.

TIP: For dual-plane balancing, do the same for the second plane.

4. Attach correction weights to the balancing planes as recommended by your instrument.

5. Take a measurement in each plane to confirm the rotor is balanced.

NOTE: You can use Trim Balancing to remove any residual imbalance.

TIP: You can swap the display so that the rotation shown on the screen matches the rotation of the shaft you are looking at.

>

> >


22

Keypad Entry

You can create keypad entries to define process input values such as current or flow rates. You can enter process input values manually using the keypad (instead of attaching a sensor to your machine). You can then transfer the data you have collected to your computer, along with your normal measurements.

If you include keypad entries in a route, your instrument will prompt you to enter values at specific points along the route. Keypad entries can also be used as onscreen reminders to perform machine checks (e.g. for checking temperature and pressure).

To collect and record entries using the keypad:

1. Create keypad entries as part of a recording route. 2. Transfer your entries to your instrument. 3. Enter the values for each keypad entry item (when prompted to do

so by your instrument). 4. Transfer the values and recordings you have collected to your

computer for analysis.

>

>

Section 2 Instrument Fundamentals

23


This section explains how to:

Switch your instrument on and off Navigate around menus and select menu items Enter and edit characters and punctuation View hint labels for the buttons on your screen Access more detailed help for a feature

Switch Instrument On or Off

You can press the power button to switch your instrument on or off.

NOTE: If your instrument is switched on and it has a battery state above 25%, it will enter Sleep mode when you press the power

button. If the battery has less than 25% charge remaining, your instrument will enter Complete Powerdown Mode when you switch it off.

When you switch your instrument on, the main menu displays the following details:

The remaining battery charge amount Today's date and time The serial number and firmware version Your user-defined description The name of the currently selected folder

TIP: You can press and hold either cancel button to return to the main menu.


24

Main menu that displays when you switch your instrument on

Use Main Menu

To navigate around the menu, press the key of the task you want to

perform. For example, you can press to take measurements, and to review recordings.

Return to Previous Menu

You can press the cancel button to return to the previous menu. If you have opened several submenus, pressing this key will return you to each previous menu item.

You can press and hold the cancel button to return to the main menu.

Use Navigation Keys and Icons

You can use the arrow icons on the keypad and screen to: Navigate backwards and forwards through menus Move up and down and across lists Expand and collapse structures that contain other items


25

The table outlines the functions of the navigation keys and icons.

Move the selection bar in the required direction.

Move the selection bar to the top of a single column list.

Move one column to the left in a multi-column list.

Move the selection bar to the bottom of a single column list.

Move one column to the right in a multi-column list.

Expand the highlighted machine structure to show its points, locations, and parameter sets.

Move to the right of the screen in a split-screen menu.

Collapse the highlighted machine structure so that only the top level displays.

Move to the left of the screen in a split-screen menu.

When you are working with large numbers of machines, you can

use the collapse icon to collapse the machine structures displayed. This will speed up navigation, enabling you to move the selection bar from machine to machine, instead of scrolling through each individual parameter set, location, or point.

Using the collapse icon


26

Select Menu Items

When several menu items are available, these will display in list format, along with arrows on the screen. You can press the arrow keys to scroll up, down, or across a multi-column list.

Select Option

To select an option from a list:

1. Use the arrows keys to move the selection bar until your option is highlighted,

2. Press to select the required option.

Using the arrow keys to navigate to the required menu item

Jump To End of List

Left and right arrows display on the right of your screen when several menu options are available. If required, you can:

Press to jump to the first list entry.

Press to jump to the final list entry.


27

To jump directly to the end of a list:

1. Open the main menu.

TIP: You can press and hold the cancel button to return to the main menu from a submenu.

2. Press button to access the Measure menu.

3. Press button to select the Spectrum Waveform menu.

4. Press button to drill down for more details about the Spectrum Waveform Left and right arrows display on the right of the screen.

5. Press button to select the first list entry, or button to select the final list entry.

Using the left and right arrows to navigate to the required menu item

Scroll through Multi-column List

You might find lengthy lists displayed in several columns. Where this happens, you can jump across columns and scroll up or down.

Cancel Option

You can press the cancel button to cancel an option and return you to the previous menu.

TIP: You can press and hold the cancel button to return to the main menu.


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Display Hint Labels and Detailed Help

The functions on your screen have hidden hint labels and more detailed snippets of help attached to them. To give you more screen space, the help is hidden by default.

To access the hint labels and more detailed snippets of help:


TIP: Press and hold the cancel button to return to the main menu from a submenu you have open.

2. Open the required menu (e.g. press button to open the Record Review menu).

3. Press the help key to display the associated hint labels.

4. Press and hold the help key to display more detailed help.

5. Press the help key again to hide the detailed help text. 6. Press any key to hide the hint labels.


29

Viewing hint labels

Accessing more detailed help


30

Display Alternative Options

For several of the menu options, one key can perform more than one

function. When an additional menu option is available, an icon will display at the top of the screen.

You can press the key to access a different set of options.

View of menu before pressing

View of menu after pressing


31

Enter Characters

The names you enter can be up to 50 characters long. These can contain a mixture of upper and lower case letters, spaces, numbers, and punctuation.

To enter letters and numbers, press the keys repeatedly to cycle through the characters until you reach the one you want to use.

EG: To enter the number 7, press four times.

You can insert spaces between words, change from upper to lower case, and delete or insert special characters as required.

Pressing to display hint labels will help you use the various editing commands.

TIP: If you press a different key, the cursor will jump to the next space. If you need to use a character that is on the same key as the previous character, pause for a moment until the cursor moves forward. This will ensure you do NOT overwrite your text.

TIP: Press if you make a mistake and wish to delete a character.


32

Example Rename Folder

This example explains how to rename a folder:


2. Press Folders & USB Export.

3. Press to change the folder name.

4. Press > Press to clear the current folder name. 5. Press the buttons provided to select the required letter.

EG: Press three times to enter the letter F.

6. Press to enter a space between words.

7. Press to access the punctuation options

8. Press > Press to display the advanced editing menu You can use this to change case, delete characters, and more.

9. Press to save your changes once you have finished entering text.

Entering characters


33

Using the advanced options


34

Additional Icons

There are additional icons you can use to manage your machines and other items.

TIP: Press to display the hint labels for a function.

The table lists the additional icons you can use to manage your machines.

Icon Function

Create a new machine

Create a new point

Create a new location

Create a new parameter set

The table lists the additional icons you can use to manage any item.

Icon Function

Create a new item

Edit the selected item

Delete the selected item

Copy the selected item into memory

Paste the copied item to the highlighted position

Section 3 Sensors

35

Section 3 Sensors

This section explains how to use the sensors that are compatible with your instrument. You will learn:

How to use the accelerometer and tachometer supplied with your instrument

How to mount a sensor correctly

Connect Sensor to Instrument

You can connect a sensor to the instrument via a BNC connector.

BNC connector

To attach a sensor cable plug to a BNC connector, insert the cable and gently turn it clockwise.

To remove a sensor cable plug from a BNC connector, grip the end of the cable plug, gently twist it anti-clockwise, and pull it up.

WARNING! Do NOT pull the sensor cable to remove the BNC connector. Doing this can damage the cable.

Mount Sensor

The sensor mounting you choose will affect the accuracy (and therefore repeatability) of your vibration measurements.

For walkathon data collection, accelerometers are usually mounted using the supplied magnetic base. However, for optimal high frequency results, you can stud-mount these (see Permanent Mounting).

NOTE: Ensure you mount tachometers, displacement sensors, proximity probes, and current sensors according to the manufacturer's instructions.

Section 3 Sensors

36

Set up Accelerometer

To set up your accelerometer:

1. Plug the accelerometer connector into the BNC sensor input of your instrument.

2. Screw the accelerometer into the magnetic base. 3. Attach the accelerometer to the measurement point using these

guidelines: Attach the accelerometer to a sturdy, rigidly mounted, non-

flexible structure, where vibration from the rotating part of the machine will be accurately transmitted.

Do NOT attach sensors to sheet metal, guards, or any machine structure that is NOT closely coupled to the source of vibration in the spinning rotor. The vibration of this kind of structure will be different to the vibration source.

The attachment structure must be at least 10 times heavier than the accelerometer itself. Do NOT mount the accelerometer on lightweight motors or similar parts as the weight of the accelerometer will distort the vibration signal. Use a smaller accelerometer for small structures.

To avoid distorted signals, attach the accelerometer as closely as possible to, and in line with, the centerline of the bearings.

The mounting surface should be flat and smooth where the accelerometer makes contact. Attach the accelerometer using the magnetic accelerometer base supplied or a threaded stud on the machine surface. The accelerometer should NOT move independently of the machine part it is attached to.

Ensure the accelerometer is oriented correctly. Vibration can vary significantly with direction.

If you are undertaking an ongoing study of a particular measurement point, always attach the accelerometer at exactly the same position you used for previous measurements

TIP: Mark the position if necessary.

Keep the accelerometer clear from other cables to ensure it is NOT twisted, kinked, or tangled.

Section 3 Sensors

37

Permanent Mounting

To mount a sensor using the stud method:

1. Follow the specifications shown in the diagram below to prepare a mounting spot on the machine.

2. Unscrew the magnetic base from the sensor. 3. Screw the sensor onto the threaded stud.

TIP: We recommend you use a thread locking compound.

CAUTION! Do NOT use a wrench to tighten the accelerometer. This may damage the sensor.

Stud mounting spot

Section 3 Sensors

38

Set up Tachometer

A tachometer collects information about a machine's rotation speed. It provides you with an exact reading of machine speed as a measurement is taken. This is more accurate than using a default RPM because a machine's speed can vary significantly under different loads.

The tachometer also provides information on the angle at which the rotor is vibrating. The angle is measured from a fixed reference mark on the rotor called the phase angle. To balance a rotor, you need to consider the amplitude of vibration and the phase angle. The amplitude shows the severity of the imbalance. The phase angle indicates the geometry of the imbalance.

WARNING! The laser tachometer is a class 2 laser product. Do NOT stare into the laser beam.

To set up your tachometer: 1. Screw the block grip extension of the tachometer into the end of the

mounting base articulated arm. 2. Plug the cable socket into the tachometer connecting pins > Turn

the locking ring to make the connection secure. 3. Locate the TACH input on your instrument > Attach the other end of

the cable to this (the LEMO end). 4. Stop the rotor. 5. Cut out a small strip of the reflective tape supplied (approximately 5

mm x 15 mm (0.2" x 0.5"). 6. Stick this piece of reflective tape to a machine part that rotates at

the rotor speed (e.g. the shaft).

NOTE: This trigger spot should provide a pronounced increase in reflection as it passes under the tachometer light beam. The tape width must be at least double the diameter of the light beam spot.

7. Mount the tachometer magnetic base to a stationary portion of the machine, close to the trigger spot.

8. Position the tachometer slightly away from the center line of the rotating machine part so that reflections from the surface of the machine part do NOT interfere with it.

9. Start the rotor > Wait until it is running at normal running speed. 10. Open the main menu on your instrument.

11. Press to access the Measure menu.

Section 3 Sensors

39

12. Press to access the Tach menu.

13. Press to access the Tach Type > Toggle this setting to Standard (if you are using the supplied tachometer). The screen will display the rotor running speed in RPM and Hz. These values will continuously update but should stabilize, indicating that the tachometer is triggering reliably. If the RPM does NOT stabilize, adjust the position of the tachometer.

Ideal sensor positioning

Preparing to take a tachometer reading

Section 3 Sensors

40

Tachometer Signal from Keyphasor

If your machine has a proximity-probe-based tachometer (tach) sensor (e.g. Keyphasor), you can use this as the tach signal for your instrument. The sensor should have a buffered front-panel BNC output. This will ensure your instrument's measurements do NOT interfere with pre-existing speed measurements.

TIP: You can purchase Keyphasor LEMO connector tach cables through your local reseller.

You should adjust the Keyphasor proximity sensor gap so the driver box output is -8 V +/- 2 V (i.e. -6 V to -10 V) when the sensor is over the shaft. This is the normal mid-range position for these sensors. When the sensor is over the keyway, its output will be -14 V to -22 V (depending on the make and model).

A number of enhancements are available for instruments with serial numbers 45000 and higher when taking recordings with a Keyphasor tachometer:

There are two additional Keyphasor voltage threshold levels, making it easier to choose an appropriate threshold for the machines Keyphasor probe gap. The previous single threshold level was found to be incompatible with some Keyphasors that had non-standard gap settings. When you take a recording using a Keyphasor tachometer, your instrument will let you know if a recording is tach-triggered but no pulses are detected. You will then be shown the RPM measurements obtained at each threshold level and be prompted to select the one that provides the best measurement of the machines speed. When the recording is received into Ascent, your Keyphasor threshold level selection will be retained for future recordings on that machine.

The Tachometer input of these instruments is also sensitive to both positive and negative signal pulses. Consequently there is no longer a requirement to use the special Keyphasor Tach cable (black strain relief, product code KEY70258). Instead you can use either that cable or the TTL Tach cable (red strain relief, product code TTL70259).

Section 3 Sensors

41

In addition to the existing Tach Trigger and Off tachometer modes, it is possible to set the mode to RPM Only for all instruments and threshold levels (standard and Keyphasor). You can use the RPM mode when you need the tachometer to record machine running speed, but do not require tach triggering (e.g. when you take coast-down recordings on a machine with rolling element bearings). The disadvantage of selecting Tach Triggering is that spectral averaging will average away the non-synchronous peaks. This is not ideal when you are trying to find rollingelement bearing faults. Additionally, in Tach Trigger mode, the tach signal must be present. This means the recording cannot be completed if the tach is disconnected or faulty. In contrast, RPM Only mode records the speed if this is available. Consequently, if the tach signal is not present, the recording is still completed and its RPM value is set to the machines default speed.

The additional Keyphasor thresholds are available for the following measurement types:

Spectrum/Waveform Demodulation Time synchronous Averaging Bump Test Coast Down/Run-up Long Time Waveform Orbit Plot

Section 3 Sensors

42

Manual Keyphasor Threshold settings

If a recording is tach-triggered but no pulses are detected, your instrument will prompt you to select the appropriate Keyphasor threshold settings. However, you can also access these settings manually if required. To do this:

1. Use the KEY70258 or TTL70259 cable to connect the TACH input of your instrument to the buffered output of the Keyphasor proximitor.

2. Press or Measure.

3. Select the required measurement type > Press .

4. Press Tach. 5. Select the required threshold.

6. Press Tach to select ONE of these options: RPM only If you only want to record the machine speed (if

available) and do NOT require phase data, tach triggering, or time synchronous averaging.

Triggered If you want to capture phase and/or perform time synchronous averaging. You can also select this option if you are recording an Orbit plot and require revolution markers.

7. Use the keys provided to select the required threshold.

TIP: Use the default 13V setting if you are using a Keyphasor but

are unsure which threshold to select. Press Off if you will NOT

be using any form of tachometer. Press for help.

Section 3 Sensors

43

Selecting the appropriate voltage for your tachometer and machine

Section 3 Sensors

44

Semi-automatic Keyphasor Threshold Selection

If a recording is tach-triggered but no pulses are being detected, your instrument will prompt you to select the appropriate Keyphasor threshold. If you are performing a Tachometer Display measurement, you can also bring up the same semi-automatic selection screen. To do this:


2. Select Tachometer Display > Press .

3. Press Tach Threshold Your instrument scans through the 3V, 8V, 13V, and 18V threshold levels, displaying the RPM value detected at each one.

4. Use the keys provided to select the threshold that delivers a stable RPM reading and matches the expected speed of the machine you are testing The threshold value you selected will be used for all subsequent recordings on the machine you are measuring.

NOTE: Your instrument will increase the duration between thresholds to find lower RPM values. This process can take just over a minute. A value of zero will display if there is no RPM value.

Correcting the threshold setting for your tachometer and machine

Section 3 Sensors

45

Use Strobe Light

If you have a strobe light with an output signal, you should be able to connect it to the tachometer input of your instrument.

If your strobe light has a BNC connector and a TTL output (0 to 5 V), you can purchase a suitable cable (with a LEMO connector) from your distributor.

MORE: For more information on other types of connectors and signals, see Strobe Output and the Frequently Asked Questions.

Section 4 Measurement Types and their Uses

46


This section describes how to set up and take different measurement types. You will learn:

How to take different types of measurements The uses of different measurement types

Spectrum

A vibration spectrum is a chart of vibration amplitude versus vibration frequency. The vibration spectrum of a machine component shows the frequencies at which the component is vibrating and the amplitude of vibration for each of these frequencies.

Spectra consist of discrete spectral lines displayed at fixed frequency intervals. The height of each spectral line represents the amplitude of vibration at that frequency. The more spectral lines in a spectrum, the higher the resolution of the spectrum.

NOTE: Higher spectrum resolutions use more memory.

Simplified version of discrete vibration spectrum


47

The key parameters you need to set are the number of spectral lines and the Fmax. Doing so will ensure all crucial information is captured. To set these parameters:


2. Press to access the Measure menu.

3. Press to access the Spectrum Waveform. 4. Use the arrow keys on the left to select an existing parameter set or

press to create a new set > Set the parameters as required.

5. Press to start measuring.


48

Strobe Output

Your instrument can be used to regulate the output frequency of an attached strobe lamp. Alternatively, it can be used to read the output of a strobe as a tachometer signal. This capability is helpful when identifying the source of vibration and unbalance in high speed machinery. It is also useful as a means of visually inspecting the condition of equipment while it is in motion.

Depending on the capabilities of the strobe, machine speeds of up to 140 Hz, 8400 CPM are supported. Some strobe models may only support frequencies below approximately 80 Hz, 4800 CPM.

NOTE: This feature requires a LEMO-to-strobe (LEMO to twin 3.5 mm plugs) cable and a suitable externally-controllable strobe lamp.

Ensure you connect only one 3.5 mm plug at a time (either the black Read or red Drive plug. Connecting both Read and Drive plugs to the strobe's input and output sockets will typically force the strobe into external Drive mode. This will disable the strobe's ability to read and provide a tachometer signal to the instrument.

NOTE: To read tachometer speed from a strobe, the strobes output must be set to output a positive signal (NOT a negative one). This is only required on some strobe models, such as some Monarch models. Read the strobe's operating instructions for details.


49

To regulate the speed of a connected strobe:

1. Connect the LEMO-to-strobe cable's LEMO plug to the instrument's tachometer socket.

2. Connect the red Drive 3.5 mm plug to the strobe lamp's input socket. 3. Ensure the Read plug is disconnected. 4. Connect a vibration sensor to the instrument's vibration sensor input

(LEMO or BNC) and to the equipment you wish to measure.

5. Press Measure > Press Spectrum Waveform.

6. Press Spectrum Waveform The Spectral Lines and WFM Buffer screen will open.

7. Press Spec Wfm repeatedly until Spectrum displays.

8. Press to return to the Spectrum Waveform screen.

9. Press twice to start the measurement. 10. Wait until the spectrum measurement stabilizes,

11. Use the Cursor Left and Cursor Right keys to move the dotted vertical cursor line to a spectral peak below 140 Hz, 8400 CPM.

TIP: For more precise positioning of the cursor, zoom into the

spectrum display using the X Axis Zoom key. NOTE: The 1X peak should typically be the largest peak on normally functioning rotating equipment.

12. Press ALT then Extended Commands to open the Extended Graph Commands window.

13. Select Strobe Light > Press A strobe icon will display over the vertical cursor line on the spectrum display.

14. Point the strobe lamp at the rotating equipment and activate The rotating component matching the frequency selected on the spectrum display will appear to freeze in place, or move slowly, allowing a visual inspection.


50

15. To change the frequency of the strobe light to another peak, or to fine-tune the frequency, select another spectral peak on the graph using the cursor keys The strobe light frequency will change to match the new peak's frequency > Cycle through each spectral peak to identify the components generating vibrations at each frequency.

NOTE: Clearing the cursors (ALT then ) will NOT disable the strobe cursor. To cancel the cursor you must exit the spectrum measurement screen.

Read Speed of Connected Strobe

To read the speed of a connected strobe:

1. Connect the LEMO-to-strobe cable's LEMO plug to your instrument's tachometer socket.

2. Connect the black Read 3.5 mm to the strobe lamp's output socket Ensure the Drive plug is disconnected and the strobe is set to Positive Signal Mode (POS) if required by the strobe model.

3. Activate the strobe lamp and adjust the output rate as required.

NOTE: The strobe frequency must be kept below 140 Hz, 8400 CPM.

4. Press Measure > Press Tach.

5. Press Tach Type repeatedly to set the tachometer to Standard The current frequency of the strobe light will display.


51

Waveform

Waveforms show how vibration levels change over time. A vibration waveform chart represents a series of equally spaced discrete sample points connected by straight lines. The chart shows the vibration level (amplitude) at each time interval during the measurement period. The more sample points in a spectrum, the higher the resolution of the waveform (but the more memory used).

The key parameters you need to set are the duration and number of samples.

The duration determines the equivalent Fmax value. If you later transfer the waveform to Ascent and display it as a spectrum, the Fmax value will be used on the chart.

The number of samples controls the number of spectral lines used when you transfer the waveform to Ascent and display it as a spectrum.

To access this measurement type:


2. Press Spectrum Waveform. 3. Press the arrow keys on the left to select an existing parameter set

(or press to create a new set). 4. Set the parameters as required.

5. Press to start measuring.


52

Demodulation

The demodulation process looks for repetitive patterns created by impact events that lie embedded within a time waveform. The process works by extracting the low amplitude, high frequency impact signals and then tracing an 'envelope' around these signals to identify them as repetitions of the same fault. The resulting spectrum, with the low frequency data removed, will now clearly show the high frequency impact signals and harmonics.

Demodulation is also useful as an early warning device as it detects bearing tones before they are visible in a normal spectrum.

The high frequency signals that demodulation aims to extract are very localized, therefore extra care must be taken to ensure the accelerometer is set up correctly. Ensure that the:

Accelerometer is mounted close to the signal source. Accelerometer is well coupled, using either stud mounting or a

very strong magnet on bare metal. A handheld probe or stinger is NOT recommended.

Accelerometer mounting is consistent between visits, otherwise trend plots of overall RMS values will be meaningless.

The bandwidth you select determines which range of frequencies the demodulation process will use. If possible, your instrument will suggest a suitable demodulation bandwidth using the machine's default RPM when configuring a demodulation recording.

For most standard speeds (above 1000 RPM), a bandwidth of 2 - 10 kHz will typically be recommended and automatically selected when you

open the Bandwidth window ( Bandwidth after selecting a measurement type of Demod).


53

The table includes typical bandwidth recommendations that may be made by your instrument, based on the default machine speed:

Demod Bandwidth Recommended Speed Range

250 Hz - 10 kHz 3000 RPM

To view the full range of available bandwidths on the instrument, select Show Complete List at the bottom of the bandwidth selection list.

If a default machine speed has NOT been configured, your instrument will NOT be able to recommend a bandwidth. You will need to manually select a bandwidth option suitable for the application. In this case, you can use the following steps to determine an appropriate b

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