model 4200 - environmental xprt · 5/9/2013 · contact us uk - dronfield land instruments...

© Land Instruments International, 2013

User Guide

Model 4200Dust/Opacity Monitor

Publication Nº 770-026Language: English

Issue 805 September 2013

Health and Safety InformationRead all of the instructions in this booklet - including all the WARNINGS and CAUTIONS - before using this product. If there is any instruction which you do not understand. DO NOT USE THE PRODUCT.

Safety Signs

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in death or personal injury.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury to the user or users, or result in damage to the product or to property.

NOTE

Indicates a potentially hazardous situation which, if not avoided, could result in damage or the loss of data.

Equipment OperationUse of this instrument in a manner not specified by Land Instruments International may be hazardous. Read and understand the user documentation supplied before installing and operating the equipment.

Protective Clothing, Face and Eye ProtectionIt is possible that this equipment is to be installed on, or near to, machinery or equipment operating at high temperatures and high pressures. Suitable protective clothing, along with face and eye protection must be worn. Refer to the health and safety guidelines for the machinery/equipment before installing this product. If in doubt, contact Land Instruments International.

Electrical Power SupplyBefore working on the electrical connections, all of the electrical power lines to the equipment must be isolated. All the electrical cables and signal cables must be connected exactly as indicated in these operating instructions. If in doubt, contact Land Instruments International.

StorageThe instrument should be stored in its packaging, in a dry sheltered area.

UnpackingCheck all packages for external signs of damage. Check the contents against the packing note.

Lifting InstructionsWhere items are too heavy to be lifted manually, use suitably rated lifting equipment. Refer to the Technical Specification for weights. All lifting should be done as stated in local regulations.

IMPORTANT INFORMATION - PLEASE READ

Contact Us

UK - DronfieldLand Instruments InternationalTel: +44 (0) 1246 417691E-Mail: [email protected]: www.landinst.com

USA - PittsburghAMETEK Land, Inc.Tel: +1 412 826 4444E-Mail: [email protected]: www.ametek-land.com

For further details on all LAND/Ametek offices, distributors and representatives, please visit our websites.

Return of Damaged GoodsIMPORTANT If any item has been damaged in transit, this should be reported to the carrier and to the supplier immediately. Damage caused in transit is the responsibility of the carrier not the supplier.

DO NOT RETURN a damaged instrument to the sender as the carrier will not then consider a claim. Save the packing with the damaged article for inspection by the carrier.

Return of Goods for RepairIf you need to return goods for repair please contact our Customer Service Department. They will be able to advise you on the correct returns procedure.

Any item returned to Land Instruments International should be adequately packaged to prevent damage during transit.

You must include a written report of the problem together with your own name and contact information, address, telephone number, email address etc.

Design and Manufacturing Standards

The Quality Management System of Land Instruments International is approved to BS EN ISO 9001 for the design, manufacture and on-site servicing of combustion, environmental monitoring and non-contact temperature measuring instrumentation.

Approvals apply in the USA

This instrument complies with current European directives relating to Electromagnetic Compatibility 89/336/EEC and Low Voltage Directive 73/23/EEC.

The Quality Management System of Ametek Motors (Shanghai) Co. Limited is approved to ISO9001:2008 for the Design and Manufacturing of Motors and the Manufacturing of Gas Analysers.Operation of radio transmitters, telephones or other electrical/electronic devices in close proximity to the equipment while the enclosure doors of the instrument or its peripherals are open, may cause interference and possible failure where the radiated emissions exceed the EMC directive.

The protection provided by both CE and IP classifications to this product may be invalidated if alterations or additions are made to the structural, electrical, mechanical or pneumatic parts of this system. Such changes may also invalidate the standard terms of warranty.

CopyrightThis manual is provided as an aid to owners of Land Instruments International’s products and contains information proprietary to Land Instruments International. This manual may not, in whole or part, be copied, or reproduced without the expressed written consent of Land Instruments International Ltd.

Copyright © 2012 Land Instruments International.

User Guide Model 4200 Dust & Opacity Monitor

Contents

1 Unpacking and Checking 1

1.1 Unpacking 11.2 Checking on Receipt 11.3 Instrument Serial Number 1

2 Health and Safety Warnings 2

2.1 Equipment Operation 22.2 Power Supply 22.3 Face and Eye Protection 22.4 Protective Clothing 22.5 Symbols Used 2

3 Theory of Operation 3

3.1 Theory 33.2 Beer-Lambert’s Law 43.3 Path Length Correction Factor (PLCF) 53.4 Examples of Different Path Length Correction Factors (PLCFs) 7

4 System Description 8

4.1 The System 84.2 Keypad Functions 124.3 Display Panel LEDs 13

5 Installation 14

5.1 Preliminary Considerations 145.2 Standpipe Installation 185.3 Alignment Tool 20

6 Air Purging 22

6.1 The Need for Air Purging 22

7 Electrical Installation 23

7.1 Cable Considerations 237.2 Sockets and Plugs 23

8 Alignment 25

8.1 Preliminary Alignment 258.2 Final Alignment 26

9 Configuration 28

9.1 Display Modes 289.2 Basic Display Flow Chart 289.3 Display Descriptions 29

User GuideModel 4200 Dust & Opacity Monitor

10 Calibration 31

10.1 Calibration Audit 3110.2 Linearity Filters 3210.3 Method 1 - Genuine Calibration (Opacity) 3210.4 Method 2 - Alternative Re-calibration (Opacity) 3410.5 Isokinetic Sampling for Dust Measurement 34

11 Maintenance 37

11.1 Periodic Maintenance Routines 3711.2 Cleaning the Optical Surfaces 3811.3 Recommended Spares 3911.4 Available Options 39

12 Troubleshooting 40

12.1 Error Codes 4012.2 Flashing Decimal Points 4012.3 First Line Servicing 41

13 Specification 42

13.1 4200 Dust & Opacity Monitor 42


1 Unpacking and Checking

1.1 Unpacking

Check all packages for external signs of damage. Check the contents against the packing note and identify them against the System Summary.

IMPORTANT

If any item has been damaged in transit this should be reported to the carrier and to the supplier immediately. DO NOT RETURN a damaged instrument to the sender as the carrier will not then consider a claim. Save the packing with the damaged article for inspection by the carrier.

1.2 Checking on Receipt

All equipment is thoroughly inspected before dispatch and no further checking should be required on receipt before installation.

1.3 Instrument Serial Number

The instrument serial number is recorded on a label on the instrument as shown below. It is recommended that the serial number and part number are recorded for future reference:

When in communication with Land Instruments International Service department it will save any confusion and expedite matters if these numbers are quoted.

Serial Number

Fig. 1-1 Model 4200 Dust & Opacity Monitor


2 Health and Safety Warnings

2.1 Equipment Operation

Use of this instrument in a manner not specified by LAND Instruments International may be hazardous.

2.2 Power Supply

Ascertain that all power lines are isolated before carrying out any work on the electrical connections. All the mains cables and signal cables must be connected in exact accordance with these operating instructions to avoid the risk of electric shock.

IMPORTANT

The protective earth conductor terminal on the mains connector must be properly terminated for operator safety. Continuity of the protective earth conductor MUST be checked before the unit is switched on for the first time.

2.3 Face and Eye Protection

Suitable eye and face protection must be worn when working on hot vessels and ducts! Special safety measures must be taken when working on a high-pressure duct.

2.4 Protective Clothing

Protective clothing must always be worn when working in the vicinity of hot vessels or ducts.

2.5 Symbols Used

Symbol Publication Description

ISO 3864 No. 8.3.6 Caution: risk of electric shock

ISO 3864 No. 8.3.1 Caution: refer to manual

IEC 417 No. 5017 Earth (ground) terminal

IEC 417 No. 5041 Caution: high temperature


3 Theory of Operation

3.1 Theory

When a beam of light crosses a medium containing smoke or dust particles some of the light is transmitted and some is lost due to scattering. The fraction which is transmitted is called the transmittance and the fraction which is lost is the opacity.

In the early days of emissions measurements, the opacity of the smoke leaving a stack was measured by the Ringelmann method in which a trained observer makes a visual estimate of its appearance.

Modern methods for opacity measurement still use the darkness of the stack gases (their opacity) to measure the amount of smoke present.

The Land Model 4200 uses a high intensity LED light source to project a beam of light across the stack; the amount of light lost in crossing the stack is the opacity and this can be related to the amount of dust and smoke present as described in Section 3.2.


3.2 Beer-Lambert’s Law

The mathematical relationship between the light transmitted by a medium and the quantity of pollutant present is known as the Beer-Lambert Law and may be written;

τ = I = e -acl

Io

where: τ = Transmittance Io = Intensity of light into the medium (see 1 below) I = Intensity of light out of the medium (see 2 below) a = Attenuation Coefficient c = Concentration of Pollutant l = Distance light beam travels through the medium (see 3 below)

Fig. 3-1

Since opacity (Op) = 1 - τ , the above equation becomes:

(1 - Op) = e-acl or Op = 1 - e-acl

Note that the quantity c is the amount of dust in the optical path. Optical Density (or extinction) is defined as:

OD = -log10τ

= -acl/2.303

or = k x OD where k = -2.303/al

By comparing a series of optical density measurements with gravimetric dust measurements taken at the same time, it is possible to determine the value of k.


3.3 Path Length Correction Factor (PLCF)

Opacity monitors may not always be mounted at the exit of a stack. Since the Ringelmann observer always views opacity at the exit of a stack, we must also introduce a factor to correct for the change in pathlengths between the measurement and exit diameters of the stack. It should also be pointed out at this time that the Land Model 4200 Dust & Opacity Monitor is a double pass instrument. This means that the light beam crosses the medium twice and hence experiences twice the amount of absorption as illustrated below. This must also be corrected in our system.

The Path Length Correction Factor (PLCF) is only relevant for Opacity measurements. It is the ratio between the diameter of the stack exit and the diameter of the stack at the point where the instrument is installed. For a parallel stack the PLCF is 1.0. For a tapering stack which is narrower at the exit than the base the PLCF is less than 1.0.

The Optical Path Length Ratio (OPLR) is the ratio between the diameter of the stack exit and the distance travelled through the stack gases by the beam. For a double-pass instrument like the Model 4200, the OPLR is equal to half the PLCF i.e.

OPLR = PLCF 2

The parameter used in the Model 4200 is the OPLR and it has a default value of 0.5 corresponding to a parallel-sided duct. In early instruments this parameter is labelled as PLCF.

Fig. 3-2 Double Pass System

Key

1. Light source lo 4. Reflector 2. Detector 5. Beam Splitter 3. Distance light beam passes through medium (l)


We can use the previous equations to calculate the opacity at the stack exit if we define the pathlength correction factor (PLCF);

PLCF = le lm

where: le = the exit pathlength

lm = the measurement pathlength

OPLR = PLCF 2

Ope = 1 - 10-OD × PLCF


3.4 Examples of Different Path Length Correction Factors (PLCFs)

Straight stack.Measurement pathlength and exit pathlength are equal.PLCF = 1.00 OPLR = 0.50

Example 1

Straight stack monitor on narrow duct. Measurement pathlength is less than exit pathlength. PLCF > 1.00 OPLR >0.50

Example 2

Straight narrows towards exit. Measurement pathlength is greater than exit pathlength. PLCF < 1.00 OPLR <0.50

Example 3


4 System Description

4.1 The System

The Land Model 4200 Continuous Opacity/Dust Monitoring System normally requires only two major components to complete a monitoring system. The double pass instrument is known as a transmissometer. A transmissometer installed with a retro-reflector on the opposing side of the stack or duct operate as a double pass cross stack opacity/dust monitor. The analogue output from the transmissometer is normally relayed to the user's data acquisition system.

There are several other optional parts available for the system: Air purge units which provide a stream of clean air to keep dust and stack gases away from the optical surfaces. Withouttheairpurgeunits,dustcouldrapidlybuildupontheopticalsurfacesandwouldcausetheopacityreadingstobeexcessivelyhighorevenresultincompletefailureanddamagetotheinstruments. Optional automatic fail safe shutters when properly installed protect the optical surfaces from corrosive stack gases in the event of air supply failure.

NOTE

Shuttersprovidetemporaryprotectiononly.Additionalprotectionisrequiredifthereisanyprolongedairpurgeoutage.

An optional weather cover can be used to provide added protection from the environment for the transmissometer. (See options in specification).


4.1.1 Transmissometer

The Land Model 4200 has been developed to be one of the most accurate and economical opacity/ dust monitors available. It uses a high-intensity LED source very low noise electronics and a sophisticated normalisation system to minimise calibration drift. The LED is electronically modulated at a frequency of 3kHz in order to reduce noise and eliminate errors due to background light. Electronic modulation eliminates the need for a mechanical chopper thus eliminating the need for moving parts.

A 4 digit 7 segment LED display combined with a simple 4 button keypad are all protected by a removable front detail plate allowing direct user interface for simplicity in alignment and setup.

The instrument is shown schematically with optional failsafe shutters in Fig. 4-1. Light from source LED1 passes through the diffuser and on to the 50/50 beamsplitter. The transmitted portion passes on to the lens which projects a well-defined collimated beam across the measuring path to the distant retro-reflector. Light returned from the retro is focused by the lens onto measurement detector Dm. The portion of light originally reflected by the beamsplitter falls on the concave mirror which focuses it onto reference detector Dr. The opacity value can be calculated from the ratio of the signals on the two detectors.

This is true only if the responsiveness of the detectors and the gain of their associated electronics remains constant. In practice temperature variations and ageing of the components means that this cannot be achieved. The Model 4200 uses a novel method (Fig. 4-1) to compensate for such changes by using LED2 to flood both Dm and Dr with light. Because it uses no focusing optics there is no possibility of misalignment and so any relative change in sensitivity between Dm and Dr will lead to a change in the ratio of signals from LED2. By alternating LED1 and LED2 between the measure and normalisation mode approximately once every second the normalization procedure is then effectively continuous.

The instrument is controlled by a sophisticated electronic system with a microprocessor which performs the calculations required to perform the normalisation.


Transmissometer measurement mode (Shutters optional)

Fig. 4-1

1 Transmissometer Unit 2 Retroreflector Unit3 Fail-safe Shutter Unit4 Beamsplitter5 Detector (Measurement)6 Detector (Reference) 7 Collomating Lens8 Span Calibration Filter9 Zero Point Reflector10 Reflector11 LED 112 LED 213 Mirror


4.1.2 Retro-reflector

The retro-reflector is a small passive unit enclosing to IP65/NEMA4 specifications a removable reflector (especially easy to clean). The reflecting surface uses embedded corner cube technology. This technology is specifically designed to reflect the beam of light directly back along the line of transmission with a very large tolerance factor to whatever angle the light beam is received. A light restrictive aperture is factory selected to suit the path length required by the customer making it unnecessary for any further correction on site. A pair of alignment sighting aids are also contained within the unit.

4.1.3 Transmissometer Weather Cover (optional)

A fibre glass weather cover (option) can be provided that will give added protection to the transmissometer from the environment.

4.1.4 Auto Failsafe Shutters (optional)

Both the transmissometer and the retro-reflector can be further protected from air supply failure to the air purges by the automatic failsafe shutter option. The shutter responds instantly to any failure of air supply fan unit air mover and will automatically shield the instruments delicate optics from the immediate ingress of dust and gases that would occur.

Note

The automatic failsafe shutter (when operated) should not be relied upon as a permanent means of protection but as a temporary protection until the problem is rectified.

Air blowers/Airmovers should be operational at all times when the instrument is mounted on the stack, otherwise damage to the system may occur.

4.1.5 Calibration Filters (optional)

Two calibration filters (options) can be supplied for use in conjunction with manual calibration checks and/or calibration audits for linearity checks.


4.2 Keypad Functions

The keypad located on the transmissometer display panel has four keys:

Key Descriptionofoperationanddisplay

Mode When progressively pressed steps through:

• Normal Opacity/Dust display

• Calibration check

• Dust gain (if Dust selected)

• Set alarm

• Set output range. The current loop output will output opacity with the output range configurable between 10 - 100% (in 5% steps) or dust in the range between 10 and 1000mg/m3 (in steps of 10mg/m3).

• Time Constant sets the signal damping between a range of 0-999.

• Set output low level (0, 2 or 4mA)

• Set alignment mode.

Note

Holding the key down for 10 seconds will also enter calibration mode.

F1 Save key. Main function to retain in memory any parameter changes.

F2 Often referred to as the 'UP' key changes the value of parameters chosen by the Mode key. Acts as a toggle in the case of Opacity/Dust selection.

F3 Often referred to as the 'DOWN' key changes the value of parameters chosen by the Mode key. Acts as a toggle in the case of Opacity/Dust selection.

Fig. 4-2 Keypad


4.3 Display Panel LEDs

+5V When illuminated, indicates the presence of the 5 volt supply rail to the circuit boards.

Alarm When illuminated, indicates a high Opacity/Dust alarm condition.

SystemOK When illuminated, indicates no detected fault conditions and instrument is in normal operating mode ( not in calibration or alignment mode).

4.3.1 Relays

Two sets of relay contacts are available terminating at the transmissometer signal socket. These provide for the Alarm and System OK facilities.

See the Installation - Electrical section for connection detail (section 6.0).

4.3.2 Output

Currentloop

• The single current loop output is configurable for a lower current of 0, 2 or 4 mA.

• The upper value will always be 20mA.

• When configured for Opacity, the current loop output range is configurable in 5% steps between 10 to 100%.

• When configured for Dust, the current loop output range is configurable in 10mg/m3 steps between 10 to 1000mg/m3.

Note

Due to limitations on the display, 1000mg/m3 is displayed as 999mg/m3

RS232

The RS232 socket is for Land Instruments International Service use only.


5 Installation

5.1 Preliminary Considerations

The transmissometer should be mounted on the stack or duct in a position where it can detect a representative concentration of dust across the stack/duct diameter. For new plant systems the transmissometer's location should be planned during the design stages; for existing systems it is critical that the best possible location be selected. If the monitor is to be used for regulatory compliance the location should be approved by the appropriate agency.

At the measurement location there should be as much negative pressure as possible for example a stack updraft. The mounting area must have a safe walkway; if necessary a sufficiently large and accessible platform should be constructed (Figure 5.1).

Measurement errors may result if the transmissometer is exposed to strong vibrations or if the stack/duct changes shape as the gas temperature changes. If these are problems which cannot be avoided a vibration free mounting can be installed. Land Instruments International can provide recommendations for vibration free mountings upon request.

The ambient temperature at the mounting location must fall between -20°C and +55°C (-4°F and 131°F). If necessary heating ventilation or isolation should be used to ensure this temperature range is not exceeded.

Fig. 5-1 Measurement Area Platform


Installation Site Requirements Model 4200

Fig. 5-2 Installation Dimensions for Instrument

Key 1. Transmissometer

2. Fail Safe Shutter

3. Retro-Reflector

4. Flange to flange pathlength


IMPORTANT : Mounting Guidelines1. The Transmissometer (1) requires approximately 400mm (16in) with

automatic fail safe shutters or 250mm (10in) without automatic fail safe shutters as a minimum distance beyond the stand pipes for installation (In addition adequate clearance for access is required for operation).

2. The Retro-Reflector (3) requires approximately 300 (12in) with automatic fail safe shutters or 165mm (7in) without automatic fail safe shutters as a minimum distance beyond the stand pipes for installation.

3. Additional clearance is required of approximately 1m (39in) for mounting and removal procedures.

4. A minimum clearance of 200mm (8in) directly below the instrument is required for purge air and electrical connections.

5. The maximum recommended air hose length between the blower and the air purge is 7m (23ft). Donotexceedthiswheninstallingtheblowerunit(s).

6. Measurement Pathlength (4) is factory set and cannot be changed by the user.


Fig. 5-4 Standpipe Mounting Flange

Key 1. 3 Studs Shown on 100.0PCD 4. Rubber Sealing Ring

2. Spherical Washers 5. M10 Nuts

3. Disc Spring Washers

Fig 5-3 Standpipe Mounting Flange - Dimensions


5.2 Standpipe Installation

The Land Model 4200 is supplied with two mounting flanges with sleeves which are used to mount the transmissometer onto the stack/duct. The sleeves are 128 mm [5.24in] long (Fig 5-3/5-4). If necessary, shorten or lengthen the sleeves when mounting to obtain the proper measurement path. Unstable mounting bases such as thin sheet metal walls may require supplemental bracing (Figure 5-5).

Important: The flanges must be mounted so that the transmissometer directly faces the retro-reflector across the centre of the stack/duct. Since most applications involve a vertical stack the axis common to both flanges must be level or perpendicular to the direction of gas flow. The flanges must be aligned so that the deviation in the mounting angle between the two flanges does not exceed 1°.

Accurately mark the centre of each flange on the stack and punch a locating mark through the liner onto the inner stack plating. Cut a hole from the liner large enough to allow eventual welding of the O.D. of the flange stub to the stack. A hole is then cut through the stack plate material at the punched location mark on the transmissometer unit side of the stack. A 6 mm to 12 mm [0.25in to 0.50in] pilot hole at the retro-reflector locating mark can also be cut at this time.

Ensure that the mounting flange installation positioning marker is in the 12 o'clock position and tack weld the transmissometer flange into place. The mounting flange plate must be aligned parallel to the stack wall. These conditions must be carefully met to ensure success in accomplishing proper alignment.

Fig. 5-5 Standpipe Mounting Flange - with Reinforcement

Key 1. Installation Positioning Marker 2. Optional Reinforcement (Customer Supplied)


Cut a hole around the retro-reflector pilot hole, large enough to allow eventual welding of the OD of the flange stub to the stack wall. The mounting flange plate must be aligned parallel to the stack wall.

Important

The Land Model 4200 Opacity Monitor is factory set to the flange-to-flange measuring path as specified by the customer at the time of sale. During the welding and alignment procedures, be sure the flange-to-flange measurement path does not exceed ±1% of the distance specified.

If the measuring path is easily accessible and short enough, the flanges can be aligned with an alignment tube (Fig 5-6). First slide the alignment tube through both flanges. Then, ensure the specified flange-to-flange measuring path is maintained to within ±1%, and tack weld the retro reflector flange in place. Make the necessary adjustments and weld the transmissometer flange in place. Finally, make the necessary adjustments and weld the retro-reflector flange in place.

Fig. 5-6


5.3 Alignment Tool

When the measurement length is too long to use an alignment pipe, Land Instruments International can supply a flange alignment tool to aid in aligning the flanges. Contact Land Instruments International if this part is required.

The flange alignment tool consists of two plates which are mounted to the flanges (Fig. 5-7a). One plate supports a light source and the other plate supports optics with a target in the centre. When the flanges are properly aligned the light spot must be located in the centre of this target (Fig. 5-7b).

To use the flange alignment tool, follow these instructions:

Important

During the welding and alignment procedures be sure the flange-to-flange pathlength is accurately maintained. Ensure flange orientation is correct.

1) Tack weld the standoff pipes to the stack - diametrically opposite.

2) Remove the 3 - locknuts and 24 disc springs from each flange and safely store.

3) Use the free running nuts supplied with the alignment kit in place of the locknuts

4) Mount the flange alignment tool according to Fig. 5-7b.

5) Align standpipe No 1 by sighting the optics in alignment tool. Weld standpipe 1.

6) Reverse the flange alignment tools (switch components around).

7) Align standpipe No 2 by sighting the optics in alignment tool. Weld standpipe 2.

8) Replace the disc springs and locknuts on the bolts (Fig. 5-3/5-4).


Fig. 5-7b

Fig. 5-7a


6 Air Purging

6.1 The Need for Air Purging

It is important to supply air to the integral air purge units to ensure the optical system remains clean during operation.

Standard Air Purge Unit Fail Safe Shutter Air Purge Unit Part Number 703-0022 Part Number 703-0732

Though negative pressure within a stack may draw sufficient air through the air purge nozzle, to prevent a build up of dust and fumes, a positive pressure air supply is recommended in all installations.

PurgeAirFlowRequirementis16cfm(27m3/hr)toeachsideoftheinstrument.

Refer to the User Guide supplied with your Blower or Air Mover for more information.


7 Electrical Installation

Caution

ALWAYS TURN OFF POWER BEFORE PERFORMING ANY ELECTRICAL WORK.

7.1 Cable Considerations

The following cable considerations are the responsibility of the customer.

1) Power supply and wiring to the fan/blower units -

Fan motor ratings: 230V 50Hz 600VA.

110V 50Hz 600VA

110V 60Hz 720VA

2) Power supply and wiring to the transmissometer:

85 to 264V 50-60Hz maximum rating 10VA

3) Alarm and signal wiring to from transmissometer to customers own data recording facilities.

Note

Use screened / shielded cables for signals. Maximum loop resistance 1000 ohm

General comments

Fan/blower units are selected to operate at 230V : 50Hz, 110V : 50Hz or 110V : 60Hz and having been factory selected for the required voltage, as indicated by the customer at the time of sale.

The system should have the capability of being totally electrically isolated. Land Instruments International recommend that a suitable isolating switch/circuit breaker or fuse is fitted to the power source. Interconnections can be made using flex - conduit or flexible conduit.

7.2 Sockets and Plugs

The transmissometer has two male plugs protected by a screwed sealing blanking cover these should be removed when connecting up and replaced whenever the unit is disconnected to protect the terminations. Supplied in separate packaging are two sets of components to make up

1) A nine pin socket for the signal cable which has crimped style terminals capable of accepting 24/28 AWG wires

2) A power socket which has 3 way and ground/earth screw fastening terminals.

Terminal connections to these sockets are shown in tables Fig 7-1.


7.2.1 Flexible Conduit Size

The sockets also have a PG9 thread suitable for connecting directly to flexible conduit. PG (Panzerroht Gewind) is a European conduit thread size used extensively throughout the continent for electrical applications.

SignalCableSocket/PlugTerminationsPlugpinnumber Description NormalTerminalState

1 System OK Relay Open2 System OK Relay Closed3 System OK Relay Common4 High Alarm Relay Open5 High Alarm Relay Closed6 High Alarm Relay Common7 Current Loop Output +ve8 Current Loop Output -ve9 Current Loop Output Screen

Fig. 7-1

PowerSupplySocket/PlugTerminationsPlugpinnumber NormalTerminalState

1 Line/Live2 Return/Neutral3 Not Used

Ground/Earth

Note

The normal state of the relay contacts is when the condition is System OK and the Alarm is not active.


8 Alignment

8.1 Preliminary Alignment

Correct installation and accurate alignment are essential if the Land Model 4200 is to function properly and meet its design specification.

Important

Ensure the air purge units, fans/airmovers are functioning and providing purge air to the transmissometer and retro-reflector units before installation begins.

To mount the transmissometer and retro-reflector heads, it is necessary to remove the three M10 nuts (315.044) and spherical washers (703.022) from the mounting studs, leaving the stack of disc springs (318.327) in place. Place the mounting flange of the head onto the studs and replace the spherical washers and M10 nuts. Tighten the nuts until the gap between the instrument flange and the mounting flange is 13.5 ± 0.5mm (0.53in ± 0.02in). Do not over-tighten the nuts as sufficient adjustment must be left in the disc springs to permit final adjustment. The space between the instrument flange and the mounting flange will be sealed with the rubber sealing ring provided, but until final alignment is completed this should be left off.

Fig. 8-1

Key

1) 3 Studs Shown on 100.0PCD 4) Rubber Sealing Ring

2) Spherical Washers 5) M10 Nuts

3) Disc Spring Washers

Connect the transmissometer to the power supply and apply power.


8.2 Final Alignment

Warning

Eye and face protection must be worn when looking into hot gases.

8.2.1 Retro-reflector Alignment

1) The instruments should be mounted and roughly aligned by the methods previously described. Adjustment nuts must not be over tightened.

2) The fan/blowers and system air purges should be fully operational.

3) Power should be already supplied to the transmissometer.

4) Remove the two securing screws securing the plate on top of the retro-reflector unit. Lift up to remove plate from retro-reflector.

Note

Observe the two alignment sighting tubes secured behind plate.

5) 1st level - Look through the aperture on the front of the retro-reflector and adjust the nuts X and Y (shown in Fig. 7-1) until the flashing light from the transmissometer is centrally aligned (see note). Nut X adjusts the horizontal while nut Y adjusts the vertical position of the spot. The third nut should only be used to adjust tension.

Make sure the spring washers are only under moderate tension: if the tension becomes excessive it is very likely that the third nut has been over tightened or the mounting flange may not have been fitted accurately.

6) 2nd level - Remove the shorter of the two alignment tubes from the cover plate. Re-check and refine the alignment by viewing through the short tube and using the procedure described in the last paragraph. Replace the short alignment tube onto the retro-reflector cover plate.

7) 3rd level - Remove the longer of the two alignment tubes from the cover plate. Re-check and refine the alignment further by viewing through the long tube and using the procedure described in the last paragraph. Replace the long alignment tube onto the retro-reflector cover plate. Replace the retro-reflector plate back into the retro-reflector unit.

8) Check all the adjusting nuts are under tension. The retro-reflector unit is now aligned.

Note

If no flashing light is visible it is possible the transmissometer is grossly misaligned or the instrument is malfunctioning.


8.2.2 Transmissometer

When the retro-reflector has been correctly aligned, the transmissometer should be aligned in a similar fashion, though in this case the alignment target is permanently visible in the sight aperture and it is simply necessary to centre the reflected flashing spot on the target by adjusting nuts X and Y on the transmissometer unit. Follow the procedure:

1. Remove the front detail plate on the transmissometer (Fig. 7-2). This exposes the sighting hole display LEDs and keypads. Viewed through the hole in the PCB the ringed target is illuminated and clearly visible located on the instrument casting behind the PCB.

2. Press the left hand Key marked MODE - Step through the displays until an I shown in the left hand side of the display e.g.

3. Adjust X and Y nuts on transmissometer unit until light is in centre of target. In the alignment mode the light is continuous (not flashing) and the figure in the right hand side of the display will now read an arbitrary figure of around 500. The transmissometer is now aligned.

Fig. 8-2

Key

1) Front Detail plate 3) Retroreflector Top Cover Plate

2) Transmissometer Top Cover Plate 4) Sighting Hole


9 ConfigurationSeveral parameters are user configurable and must be set prior to commissioning the Model 4200. They are all accessible through the keypad and viewed on the LED display.

9.1 Display Modes

The leading digit on the display indicates the present mode, except for SET OUTPUT.

MODE LEADING DIGIT DISPLAY

OPACITY 'o' DUST 'd' DUST GAIN 'F'CAL CHECK 'c'SET ALARM LIMIT 'A'SET OUTPUT RANGE 'r'SET OUTPUT 0-20, 2-20 or 4-20TIME CONSTANT 't'INTENSITY 'i'

9.2 Basic Display Flow Chart

BLANK DISPLAY

OPACITY 'o' DUST 'd'

CAL CHECK 'c' 'c'

SELECT UNITS- 'OPAC' 'duSt'

DUST GAIN 'F'

SET ALARM 'A' 'A'

SET O/P RANGE 'r' 'r'

SET OUTPUT '4-20' '4-20'

TIME CONSTANT 't' 't'

INTENSITY 'i' 'i'

The above chart shows the two flow paths of the display when either OPACITY or DUST is chosen as the required display unit. The flow path starts from the blank display which can either be accessed by stepping through with the MODE key or, will after 10 minutes of no key operation, automatically revert to the blank display.

Note

The normal running/operating display is either OPACITY ‘o’ or DUST ‘d’


9.3 Display Descriptions

Step through the selections by pressing the Mode key

OPACITY/DUST display Normally this will display the opacity value in % or dust concentrations in mg/m3 dependent on which has been selected. Opacity readings will be in the range of 00.0% to 100%. Dust readings will range from 0 to 999mg/m3.

Note

In either mode the decimal point will flash if the values are out of range.

In cases where a serious fault occurs, an error notice will appear on the display showing a leading 'Er' followed by a coded error number. Contact Land Instruments International service department.

CAL CHECK display 'c'- Always displays the value in terms of opacity. This display is used for calibration audits (Checks on zero and span).

SELECT UNITS display 'OPAC' - 'duSt' by toggling the F2 & F3 keys, either opacity or dust readings will be displayed and output.

DUST GAIN 'F' - This display is only entered if dust is selected. The gain value can be set between 1 and 9999. This is represented on the display as 0.001 and 9.99.

SET ALARM 'A'- High alarm limits in the range of 1.0 to 99.9 % for opacity or 1 to 999mg/m3 for dust can be set.

Note

This limit will require resetting if the output option is changed. i.e. dust to opacity.

SET RANGE 'r'- Adjusts the current loop output upper span value (20mA) to be represented as a percentage opacity value of between 10 to 100%, in steps of 5%, and dust between 10 to 1000mg/m3 in steps of 10mg/m3.

Note

Due to limitations on the display a current loop output of 1000 is shown as 999

TIME CONSTANT 't' - This is a signal damping facility adjustable between 0 and 999 seconds. The recommended setting should just allow variations of the signal value to be distinguished but avoid rapid spikes and depressions. The time constant number represents the time response of the output to reach 90% of the final step change value. (Default value=1)

INTENSITY 'i' - This is an arbitrary figure between 0 and 999. The factory alignment figure at a fixed pathlength (user selected) is 500. Over range is indicated by the decimal points on the display flashing.


Full Display Flowchart

Fig. 9-1


10 Calibration

10.1 Calibration Audit

To perform a calibration audit remove the front detail plate (Fig. 10-1) from the transmissometer to expose the display/ keypad unit. The display may be blank as a time out facility operates in the software. Press the Mode key (left key on keypad) until 'c' is displayed on the left hand side of display. e.g.

Remove the top cover on the transmissometer (Fig. 10-1) by loosening the two securing screws and sliding the cover forward. DO NOT REMOVE THE YELLOW/GREEN WIRE.

Fig. 10-1

Key 1) Front Detail Panel

2) Filter Holders

3) Top Covers

10.1.1 Zero check

Retrieve the zero reflector holder (dispatched in separate packaging) part number 703.051. Place the holder in the calibration filter position 1 (nearest the stack see Fig. 10-1 - see note) with the reflecting surface towards the display end of the instrument. After a few seconds the display reading will settle down, the final figure will indicate the zero drift of the instrument.

Note

The zero reflector must be pressed fully down in to a near vertical position (Fig. 10.2). To achieve this keep pressure against the filter holder spring.

Correct method for mounting zero reflector in holder.

Fig. 10-2


10.1.2 Span Check

Remove the reflector holder and turn it into the reverse plane so that when placed in the same filter holder position (1) as before. The blank, non reflective surface is now facing towards the display end of the instrument. After a short period of time the display value should read 100. This represents 100% opacity any deviation from this value signifies the span drift.

If either drift is unacceptable, outside the instrument specification (< 2%), or local authority requirements, then a re-calibration is required. See the following re-calibration procedure.

10.2 Linearity Filters

Two (optional) filters are available that can be obtained from Land Instruments International. They represent a nominal 8% and 20% opacity. These filters can be introduced into a calibration audit procedure to confirm the linearity of the system.

1) On completion of the calibration audit check for zero and 100% span continue with the following steps:

2) Place the zero reflector holder with the reflecting surface facing the display end of the transmissometer in the position nearest the stack.

3) Place the 20% filter in the other vacant filter holder position.

4) Allow the display reading to settle and the display should indicate 20% (opacity).

5) Follow steps 3 and 4 this time using the 8% filter. The display should read 8% opacity.

Note

When filters are supplied they will have documentation giving single pass and double pass calibration values. Unlike the normal operating mode readings done in the constants mode do not have the benefit of adjustment with a path length correction factor in the software (such as the above checks). Readings taken with the linearity filters should be compared against the double pass calibration values supplied with the filters not single pass values.

10.3 Method 1 - Genuine Calibration (Opacity)

If the calibration audit has shown that the calibration of the Model 4200 is outside the acceptable range first of all ensure that all optical surfaces are clean and the optical path is not obstructed. If re- calibration is needed it must be carried out by a Land Service Engineer or other competent person.

Re-calibration must only be carried out under clear stack conditions with the process off or in laboratory conditions with the transmissometer set to the correct flange-to-flange path length. If clear stack conditions are not possible then use Method 2 (This method does not calibrate out any changes with the retro-reflector - i.e. dirty reflector).


Ensure that the instrument is correctly aligned and the optical path is clear.

1) Remove the top cover plate on the transmissometer.

2) The display must be blank (normally the software operates a time out facility after 10 minutes). The blank screen can also be displayed by stepping through the menu. Press and hold the Mode key (5 seconds) until the display indicates Ixxx, the value on the right hand side should normally be around 500 if still correctly aligned. Check the reflected light spot is in the centre of the target viewed through the sighting hole. (See the alignment procedure if necessary).

Note: In this mode (align) the target light is continuously illuminated.

3) Press and hold the Mode key (5 seconds) until the word 'Zero' appears on the display. The target light will now be flashing.

4) Press and hold the Mode key again (approx 2 seconds until decimal points start to flash). This initiates the zero calculation.

5) At the end of the zero measurement the word 'Span' (ie 100% opacity) is displayed.

6) For instruments with a path length less than 5 metres: place the zero reflector holder (supplied as a separate item) into the filter holder position nearest the stack with the blank side (non reflective) nearest the display. For instruments with a path length greater than 5 metres: remove the top plate from the retroreflector assembly. The retroreflector element is attached to this plate. Its removal eliminates the possibility of any reflected light causing errors in calibration.

7) Press the Mode key and hold until the decimal points on the display start to flash, release the key. After a short period the decimal point lights will stop flashing and the word 'bal' (Balance) appears on the display. See the BALANCE note below.

8) Place the Zero reflector in the holder so that the side with the reflector on is now facing the display end and replace into the same filter holder position as before.

9) Press the Mode key until the decimal points on the display flash.

10) On completion of the balance measurement the opacity reading is restored. When the zero reflector holder is removed the true stack value will be displayed.

11) Replace the cover plate (and the retroreflector top plate if necessary)

The Model 4200 is now correctly calibrated for opacity.

Note

BALANCE - This measurement is taken so that a compensation factor can be placed in the software to compensate for the difference in reflectivity between the reflector on the zero reflector holder and the retro-reflector is accounted for.


10.4 Method 2 - Alternative Re-calibration (Opacity)

Re-calibration of the system may be carried out using this method with the units still in position on the stack, without clear stack conditions.

Note

This method does not calibrate out any changes with the retro-reflector. i.e. dirty reflector.

1) Remove the top cover plate on the transmissometer.

2) Insert the zero reflector holder in the filter position nearest the stack with the reflector facing the display end of the transmissometer.

3) The display must be blank (normally the software operates a time out facility after 10 minutes). The blank screen can also be displayed by stepping through the menu.

Step through with the Mode key until the display indicates CXXX.

4) Press and hold the F1 key until the word 'Zero' appears on the display. The target light decimal point will flash indicating the instrument is automatically setting the zero point.

When the decimal point stops flashing the display value should be 0.00.

5) Place the zero reflector holder (supplied as a separate item) into the filter holder position nearest the stack with the blank side (non reflective) nearest the display.

6) Press the F2 key and hold for 2 seconds until the decimal points on the display start to flash the display should now read C100

7) Remove the Zero reflector holder. Replace the transmissometer cover plate.

9) Press the Mode key until the display reads 0XXX (opacity value)

10) The calibration procedure is now complete.

10.5 Isokinetic Sampling for Dust Measurement

The customer is responsible for contacting and arranging for an appropriate agency to perform isokinetic sampling measurements on the emissions from the stack. The customer should prepare the Opacity/Dust monitoring system so that measurements can be made at the same time as the isokinetic samples are taken. When the results from the isokinetic samples are received, the instrument can be adjusted accordingly to conform to the average reading.


10.5.1 Preparation

The unit should be fully aligned and operational. Certain parameters as follows should be set in preparation.

Select the Dust range by pressing the Mode key until the words 'OPAC' or 'duSt' is displayed. Toggle the selection with F2 or F3 keys to select 'duSt'. Press F1 and hold key until display flashes on & off to save change.

Set the Dust Gain: Step through the selections using the Mode key until 'F' is displayed in the right hand side of the display. Use F2 or F3 keys to set the Dust Gain factor to 0.1. Press F1 key to save. (This value will need changing when the isokinetic sampling results are known).

Set the Output Range to 200: Step through the selections using the Mode key until 'r' is displayed in the left hand side of the display. Use F2 or F3 keys to set the display value to 200. ( This gives a sensible range on the current loop output during this test so that a chart recording can be used for averaging the values). Press F1 and hold key until display flashes on & off to save change.

Select the Dust mode display: Step through the selections using the Mode key until 'd' is displayed in the right hand side of the display. The display will now be displaying the dust values in the stack.

10.5.2 Sample Readings

In order to calculate the Model 4200 for dust measurements it is necessary to know the average dust value measured by the instrument during the period of isokinetic sample. If several samples are taken, it is necessary to know the average reading for each sample. It is possible to take readings directly from the instrument's LED display a more satisfactory alternative is to use a chart recorder or data acquisition system.

Note

The indicated dust value will not at this stage be an accurate measurement of the amount of dust present since the Dust Gain has been set to an arbitrary value.

10.5.3 Calculating the new Dust Gain Factor

When the samples have been analysed gravimetrically it will be possible to plot a graph of isokinetic dust density against the Model 4200 dust value. Plot a 'best fit' straight line passing through the origin and calculate the gradient of the line. The Dust Gain can be calculated as Dust Gain factor = Gradient * 0.1

Where the value 0.1 is the original Dust Gain Factor.

See worked example, Fig. 10.3.


e.g. Worked example - For a particular process four isokinetic samples were taken.

Sample number Dust Value mg.m-3 Isokinetic Dust Measured by 4200 Measurement

1 80 101 2 62 65 3 147 190 4 165 196

Fig. 10-3

Dust Gradient (sample from graph, shown with dotted lines): 150/125 = 1.20

Dust Gain Factor = Gradient * 0.1 = 1.20 * 0.1 = 0.120

10.5.4 Input new Dust Gain Factor

Set the Dust Gain. Step through the selections using the Mode key until 'F' is displayed in the left hand side of the display. Use F2 or F3 keys to set the New Dust Gain factor to the new calculated value. Press F1 and hold key until display flashes on & off to save change.

10.5.5 Reset Output Range

Reset the range value to the desired operating range as required. The instrument is now calibrated for Dust measurements.


11 Maintenance

11.1 Periodic Maintenance Routines

The Land Instruments International Model 4200 has been designed for a minimal amount of routine maintenance in normal applications. To ensure a maximum monitor lifetime, however, the following maintenance schedule has been developed. Remember that the air purge system should always be left on, even if the boiler is off, to prevent any contamination of the optics. In exceptionally dirty facilities the time periods below should be shortened.

Item Part Maintenance ProcedureAir Hoses (1.5ft / 5ft) 318.239 90 days Examine hoses for holes or leaks.

Test all hose clamps for tightness.Pre-filter 701.893 90 days Dust level should be below the

line. Remove, empty, wipe out and replace.

Filter cover/ Rubber cup

N/A 90 days Remove the filter from the filter housing. Remove the rubber cup, then empty, wipe out and replace.

Filter Element 317.441 90 days Examine for holes or rips. Wash thoroughly, dry, then replace. Replace annually with a new filter.

Blower 110V 50Hz 230V 50Hz 120V 60Hz

317.444 317.448 317.448

90 days Check for bearing noise. bear-ing failure and subsequent blower failure can be detected early. Check blower air flow to be sure that the blower is performing normally. Dirty air filters or clogs may reduce air flow and cause undue stress on the blowers.

Optics N/A 90 days Check and clean the optics.Air Purge N/A 90 days Check that there is a continu-

ous stream of purge air into the stack. Check that there is no ash buildup inside the standpipes that could block the light path.

During the regularly scheduled maintenance periods, any optional equipment (i.e. shutters, purges, weathercovers) should be checked for correct operation. If any potential problems are noted, the equipment should be repaired or replaced if necessary.


11.2 Cleaning the Optical Surfaces

After prolonged use, it is likely that some contamination will occur on the optical surfaces of the Model 4200. The time taken for significant contamination to occur depends very much on the nature of the installation. but in a typical situation it should be sufficient to clean the optics every 90 days. Two optical components should be cleaned, using the lens cloth supplied by Land Instruments International.

Note

Always ensure the lens cloth is kept clean. A dirty lens cloth can scratch the optical surface and cause permanent damage to the Model 4200. Replacement lens cloths can be purchased from Land Instruments International. Warning: avoid finger contact with the reflector surface.

Disconnect the power and signal cables before commencing. To clean the retro-reflector remove the top plate on the retro-reflector loosen the 2 securing screws, slide the plate towards the stack until clear of the securing screws, then lift up and out to expose the reflector plate. Carefully wipe the surface of the retro-reflector with the lens cloth then replace the plate in a reverse sequence. Tighten the two securing screws.

To clean the mains lens, open the transmissometer housing by undoing the four M8 nuts that secure the main body to the purge assembly. Do not disturb the purge assembly.

Remove the two M4 screws holding the lens assembly securing plate, remove the plate and gasket . Withdraw the lens assembly. Wipe the lens using the lens cloth. Replace in the reverse order (renew gasket if necessary). Check all nuts and screws are fully tightened.


11.3 Recommended Spares

Quantity Description PartNº Comments1 Lens cloth 320.8041 Air Filter Element 317.441 Replacement element for air blower unit1 Reflector Element 322.600 Replacement reflector for retro-reflector

38mm ID Hose 306.046 Hose for failsafe shutters/fan/blowersHose clips (Terry) 318.068 Securing clips for above hose

1 Screen Filter 317.561 Replacement element for screen filter

11.4 Available Options

Quantity Description PartNº Comments2 Air Mover 703.0131 Fan unit Voltage and frequency detail required

1 or 2 Auto shutters 703.0731 Weather cover 703.069 For transmissometer only1 Alignment unit 703.070 2 parts - Light transmitter - optical

receiver1 Std. cal. filter NV15 8% 322.8001 Std. cal. filter NV15 20% 322.8011 Air line filter unit 700.834

Note

The alignment unit (703.070) if available may be supplied on a basis rental from Land Instruments International. Contact Land Instruments International Sales department for details.


12 Troubleshooting

12.1 Error Codes

Only a limited number of possible errors can be detected by the microprocessor system in the transmissometer and they are displayed as an error code.

e.g. ER15

This signifies a serious malfunction of the system. Contact Land Instruments International for advice and service.

Error identification table

Identification Number

Fault Plus Plus Plus

1 M LED Failure2 F LED Failure3 M LED Failure F LED Failure4 ADC Overrange5 M LED Failure ADC Overrange6 F LED Failure ADC Overrange7 M LED Failure F LED Failure ADC Overrange8 Checksum Error9 Checksum Error M LED Failure10 Checksum Error F LED Failure11 Checksum Error M LED Failure F LED Failure12 Checksum Error ADC Overrange13 Checksum Error ADC Overrange14 Checksum Error ADC Overrange F LED Failure15 Checksum Error ADC Overrange F LED Failure

12.2 Flashing Decimal Points

On normal operating display, indicate opacity or dust readings out of the instrument operating range.


12.3 First Line Servicing

In the event of a failure with the system, the customer should make some provisional checks and actions before calling Land Instruments International Service department.

1) Always leave the fan/blowers operating while the transmissometer is in position on the stack.

2) On no account remove the main cover to the transmissometer with the power supply still switched on.

3) Remove the front detail panel on the transmissometer to reveal the display unit. Check the state of the LED indicators.

If:

a) The 5v LED is OFF. Check the power supply source to the unit is switched on. Fuse failures or overload trip of circuit breakers should not be replaced or reset until the cause of failure has been identified and remedied.

Check all cables and connections are in place and not damaged.

b) The SYSTEM OK light is Off. This indicates a fault has been detected. Check the instrument is not set in the align or calibration mode.

c) Alarm LED is ON. This indicates a high opacity condition which may be due to fault conditions.

This can occur if the purge unit is blocked or the auto failsafe shutter (if fitted) has operated and remains in the failsafe position (closed).

If the system is alignment has been disturbed an alarm indication may occur. Check alignment.


13 Specification

13.1 4200 Dust & Opacity Monitor

System PerformanceOperating Principle: Cross-stack TransmissometerOperating Wavelength: 623 ±20nmLight Source: High Intensity LED (lifetime > 5 years)Accuracy: ±2% Opacity (Based on single pass

opacity with 95% confidence coefficient)Repeatability: ±2% (±5% for pathlengh > 7.5m/25ft)Resolution: ±0.25%Drift: <2% of Opacity/Dust per monthAngle of Projection: <5°Angle of View: <5°Response Time: 5 second to 90% of the final value after

step changeUser set average time: 1s - 59s 1min to 59min or 1hr to 8hrsFlange to Flange Pathlength: 0.3m to 10m (1ft to 32ft) minimum flange

to flange width

Calibration

Method Push buttons for setup calibration alignment mode

Check: Manual Zero and Span CheckLinearity: Built in Audit JigDust: Single Calibration Constant

Transmissometer

Dimensions: 404x 127 x 157 (Length x Width x Height) 16in x 5in x 6in (Length x Width x Height)

Weight: 5Kg (11 lb)

Retro-Reflector

Dimensions: 200 x 127 x 127 (Length x Width x Height) 7.9in x 5in x 5in (Length x Width x Height)

Weight: 2kg (4.4 lb)

Display

Type: Easy access via removable cover panel on transmissometer

Size: 4-digit: red LEDParameters: 0-99.99%; 0-999mg/m3 also used for

configuration and diagnostics


Inputs/Outputs

Current Loop Outputs: 0, 2, 4 to 20mA Relays: 1. System OK 2. Zero Cal in progress 3. Span Cal in progress 4. High level alarm (1) 5. High level alarm (2) 6. Maintenance

Relay

Contact Type/Rating: Single pole changeover 1A at 24Vdc, 0.5A at 125Vac, for System OK and High Alarm

Environmental Protection

Operating Temperature: -20 to +55°C (-4 to +131°F) Maximum Flue Gas Temperature: 600ºC (1112ºF) Protection Rating: IP65/NEMA4Safety: Conforms with EN 61010Electromagnetic Compatibility (EMC): Conforms with EN50 081 & EN50 082

Electrical Data

Power Rating: 10WVoltage: 100 - 240V a.c. Frequency: 50/60 HzFuse rating and characteristics: 3.15A (T)

Continuous product development may make it necessary to change these details without notice.

Issue 6 July 2013

Gas Monitoring Products

Standard Terms of WarrantyLand Instruments International warrant all products of our own manufacture to be within specified limits of calibration,if any, when despatched from our works. Also that they are free from defects in material and workmanship fornormal use and service when used for their intended purpose within the limits of our specification. The period ofwarranty, with respect to defects in material and workmanship, will be one year from date of despatch, or readinessfor despatch should delivery be delayed by the customer who has been notified of the readiness at or after theacknowledged estimated date of despatch.

Land Instruments International guarantees to repair any defective workmanship or replace at its own option anydefective parts in any product of its manufacture, provided that the defective instrument is returned to our worksfree of charge and securely packed. Also, provided that the said goods are found to be solely defective due to faultydesign, materials or workmanship and not by improper use or accident.

Items which under their normal course of use or storage, age or deteriorate e.g. measuring cells, batteries, vacuumtubes, thermocouples, are not covered by this warranty, and will be charged for if replaced together with labourcharges for any work found not to be covered by the warranty and any transport or import charges incurred by LandInstruments International at the customers expense.

Equipment or components purchased by Land Instruments International from other manufacturers and used with orwithin Land Instruments International equipment bear only the warranty of the original manufacturer.Warranty work will only be carried out on site on receipt of an official order from the customer who will be chargedfor all travelling time plus travelling and living expenses involved to carry out the work. Should the said faulty opera-tion not be the cause of the instrument’s faulty design, materials or workmanship, but due to application conditions,Land Instruments International reserve the right to charge additionally for all labour on establishing this atthe customer’s works.

Warranty cover is subject to the correct planned maintenance being done in accordance with the published serviceschedule. Failure to follow the planned maintenance will void the warranty terms. Any warranty claim in this eventwill be at the discretion of Land Instruments International.Whilst every care is taken in the manufacture of our products, we can accept no responsibility for any consequentialloss, however caused, through the failure of any of our products to operate accurately or correctly.

All products except 4500 MkIIIThe standard warranty on new instruments is a 1-year return-to-base warranty, including all electrochemical cells. Ifrepairs are performed at site, then travelling time and expenses will be charged at standard rates. Purchased SpareParts are warranted for 1 year from date of shipment, carriage included. If a Spare Part is supplied under warranty,then this part is only warranted for the residue of the applicable warranty period. Calibration filters are not warrantedagainst any damage or change in characteristic that may occur due to mishandling.

Model 4500 MkIIIThe standard warranty on new instruments is a 3-year return-to-base warranty. If repairs are performed at site, thentravelling time and expenses will be charged at standard rates. Purchased Spare Parts are warranted for 1 year fromdate of shipment, carriage included. If a Spare Part is supplied under warranty, then this part is only warranted forthe residue of the applicable warranty period. Calibration filters are not warranted against any damage or change incharacteristic that may occur due to mishandling. The 4500 MkIII light source has a lifetime warranty.

Exclusions1. Warranty subject to the analysers being used in the manner for which they were designed2. Warranty subject to all recommended maintenance being performed as defined in the operatingor service manual or in the quotation3. The following consumable items are specifically excluded: All filters, Electrochemical cells, ChemicalDrying Agents, Batteries.

model 4200 - environmental xprt · 5/9/2013 · contact us uk - dronfield land instruments...

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