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  • iTeledyne Analytical Instruments

    Thermal Conductivity Analyzer

    OPERATING INSTRUCTIONS FOR

    Model 2020Thermal Conductivity Analyzer

    HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORINGSYSTEM.

    PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.

    HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSISTFOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.

    ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING. BEFORECONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/MANAGER.

    DANGER

    P/N M6767708/06/1999

    ECO # 99-0323

  • Teledyne Analytical Instrumentsii

    Model 2020

    Copyright 1999 Teledyne Analytical Instruments

    All Rights Reserved. No part of this manual may be reproduced, transmitted, tran-scribed, stored in a retrieval system, or translated into any other language or computerlanguage in whole or in part, in any form or by any means, whether it be electronic,mechanical, magnetic, optical, manual, or otherwise, without the prior written consent ofTeledyne Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-1580.

    Warranty

    This equipment is sold subject to the mutual agreement that it is warranted by us freefrom defects of material and of construction, and that our liability shall be limited toreplacing or repairing at our factory (without charge, except for transportation), or atcustomer plant at our option, any material or construction in which defects becomeapparent within one year from the date of shipment, except in cases where quotations oracknowledgments provide for a shorter period. Components manufactured by others bearthe warranty of their manufacturer. This warranty does not cover defects caused by wear,accident, misuse, neglect or repairs other than those performed by Teledyne or an autho-rized service center. We assume no liability for direct or indirect damages of any kind andthe purchaser by the acceptance of the equipment will assume all liability for any damagewhich may result from its use or misuse.

    We reserve the right to employ any suitable material in the manufacture of ourapparatus, and to make any alterations in the dimensions, shape or weight of any parts, inso far as such alterations do not adversely affect our warranty.

    Important Notice

    This instrument provides measurement readings to its user, and serves as a tool bywhich valuable data can be gathered. The information provided by the instrument mayassist the user in eliminating potential hazards caused by his process; however, it isessential that all personnel involved in the use of the instrument or its interface, with theprocess being measured, be properly trained in the process itself, as well as all instrumenta-tion related to it.

    The safety of personnel is ultimately the responsibility of those who control processconditions. While this instrument may be able to provide early warning of imminent danger,it has no control over process conditions, and it can be misused. In particular, any alarm orcontrol systems installed must be tested and understood, both as to how they operate andas to how they can be defeated. Any safeguards required such as locks, labels, or redun-dancy, must be provided by the user or specifically requested of Teledyne at the time theorder is placed.

    Therefore, the purchaser must be aware of the hazardous process conditions. Thepurchaser is responsible for the training of personnel, for providing hazard warningmethods and instrumentation per the appropriate standards, and for ensuring that hazardwarning devices and instrumentation are maintained and operated properly.

    Teledyne Analytical Instruments, the manufacturer of this instrument, cannotaccept responsibility for conditions beyond its knowledge and control. No statementexpressed or implied by this document or any information disseminated by the manufactur-er or its agents, is to be construed as a warranty of adequate safety control under theusers process conditions.

  • iiiTeledyne Analytical Instruments

    Thermal Conductivity Analyzer

    Specific Model Information

    The instrument for which this manual was supplied may incorporate one or moreoptions not supplied in the standard instrument. Commonly available options are listedbelow, with check boxes. Any that are incorporated in the instrument for which thismanual is supplied are indicated by a check mark in the box.

    Instrument Serial Number: _______________________

    Standard Options Included in the Instrument with the Above Serial Number:

    q 2020L: Gas selector panel consisting of sample/ref flow meters withstainless steel control valves, tubing and fittings.

    q 2020C: Auto Calibration valves (zero/span) built-in gas selector paneland control valves are electronically controlled to providesynchronization with the analyzers operations.

    q 2020R: Sealed reference TC cell (application dependent, contactfactory).

    Special Options:

    q 2020F: Groups C & D Flame Arrestors with Flow Control Gas Panel.

    q 2020H: Stainless Cell Block with Gold Filaments.

    q 2020O: Groups B Flame Arrestors with Flow Control Gas Panel.

    q 2020P: Groups C & D Flame Arrestors with Cal Valves and FlowControl Gas Panel.

    q 2020Q: Groups B Flame Arrestors with Cal Valves and Flow ControlGas Panel.

  • Teledyne Analytical Instrumentsiv

    Model 2020

    Table of Contents

    1 Introduction

    1.1 Overview ........................................................................ 1-11.2 Typical Applications ....................................................... 1-11.3 Main Features of the Analyzer ....................................... 1-21.4 Model Designations ....................................................... 1-31.5 Operator Interface (Front Panel) .................................... 1-3

    1.5.1 UP/DOWN Switch ................................................ 1-41.5.2 ESCAPE/ENTER Switch ..................................... 1-5

    1.6 Recognizing Difference Between LCD & VFD ............... 1-51.7 Equipment Interface (Rear Panel) .................................. 1-51.8 Gas Connections ........................................................... 1-6

    2 Operational Theory

    2.1 Introduction .................................................................... 2-12.2 Sensor Theory ............................................................... 2-1

    2.2.1 Sensor Configuration .............................................. 2-12.2.2 Calibration ............................................................... 2-22.2.3 Effects of Flowrate and Gas Density ....................... 2-32.2.4 Measurement Results ............................................. 2-3

    2.3 Electronics and Signal Processing ................................ 2-32.4 Temperature Control ...................................................... 2-5

    3 Installation

    3.1 Unpacking the Analyzer ................................................. 3-13.2 Mounting the Analyzer ................................................... 3-13.3 Electrical Connections (Rear Panel) .............................. 3-3

    3.3.1 Primary Input Power .............................................. 3-33.3.2 Fuse Installation..................................................... 3-43.3.3 Voltage Selections ................................................. 3-43.3.4 Analog Outputs ...................................................... 3-43.3.5 Alarm Relays ......................................................... 3-63.3.6 Digital Remote Cal Inputs ...................................... 3-73.3.7 Range ID Relays .................................................... 3-83.3.8 Network I/O ............................................................ 3-93.3.9 RS-232 Port ........................................................... 3-93.3.10 Remote Probe Connector ...................................... 3-10

    3.4 Gas Connections ...........................................................3-113.4.1 Sample System Design .........................................3-133.4.2 Pressure and Flow Rate Regulation ......................3-14

  • vTeledyne Analytical Instruments

    Thermal Conductivity Analyzer

    3.4.3 VENT Exhaust .......................................................3-143.4.4 SAMPLE Gas.........................................................3-153.4.5 REFERENCE Gas .................................................3-153.4.6 ZERO Gas .............................................................3-163.4.7 SPAN Gas ..............................................................3-16

    3.5 Testing the System ........................................................3-16

    4 Operation

    4.1 Introduction .................................................................... 4-14.2 Using the Data Entry and Function Buttons................... 4-2

    4.2.1 Mode/Function Selection ....................................... 4-24.2.1.1 Analysis Mode ............................................... 4-24.2.1.2 Setup Mode ................................................... 4-4

    4.2.2 Data Entry .............................................................. 4-54.2.2.1 ENTER .......................................................... 4-54.2.2.2 Escape ........................................................... 4-5

    4.3 The System Function ..................................................... 4-64.3.1 Setting the Display ................................................. 4-64.3.2 Setting up an Auto-Cal ........................................... 4-64.3.3 Password Protection .............................................. 4-7

    4.3.3.1 Entering the Password

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