Teledyne 2000XTC User Manual

OPERATING INSTRUCTIONS FOR

2000 XTC

Thermal Conductivity Transmitter

P/N M74838

ECO: 04-0203

REV 1

Toxic gases and/or flammable liquids may be present in this monitoring system.
Personal protective equipment may be required when servicing this instrument.
Hazardous voltages exist on certain components internally which may persist

for a time even after the power is turned off and disconnected.
Only authorized personnel should conduct maintenance and/or servicing.

DANGER

Teledyne Analytical Instruments

2000 XTC

Before conducting any maintenance or servicing, consult with authorized
supervisor/manager.

Copyright © 2002 Teledyne Analytical Instruments

All Rights Reserved. No part of this manual may be reproduced, transmitted, transcribed,
stored in a retrieval system, or translated into any other language or computer language 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 of Teledyne 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 free from
defects of material and of construction, and that our liability shall be limited to replacing or
repairing at our factory (without charge, except for transportation), or at customer plant at our
option, any material or construction in which defects become apparent within one year from the
date of shipment, except in cases where quotations or acknowledgements provide for a shorter
period. Components manufactured by others bear the 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 authorized service center. We assume no liability for direct
or indirect damages of any kind and the purchaser by the acceptance of the equipment will
assume all liability for any damage which may result from its use or misuse.

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

Important Notice

This instrument provides measurement readings to its user, an d serves as a to ol by whic h valuable
data can be gathered. The information provided by the instrument may assist the user in
eliminating potential hazards caused by his process; however, it is essential that all personnel
involved in the use of the ins t rum ent o r its in terfa ce , wi th t he p rocess be i ng m easu red, be pr operl y
trained in the process itself, as well as all instrumentation related to it.

The safety of personnel is ultimately the responsibility of those who control process conditions.
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 or control
systems installed must be tested and understood, both as to how they operate and as to how
they can be defeated. Any safeguards required such as locks, labels, or redundancy, must be
provided by the user or specifically requested of Teledyne at the time the order is placed.

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

Teledyne Analytical Instruments, the manufacturer of this instrument, cannot accept
responsibility for conditions beyond its knowledge and control. No statement expressed or
implied by this document or any information disseminated by the manufacturer or its agents, is
to be construed as a warranty of adequate safety control under the user’s process conditions.

Teledyne Analytical Instruments ii

Thermal Conductivity Transmitter

Specific Model Information

It is not recommended that this instrument be used for analysis on any
other gas or gas mixture than that specified at the time of purchase.
Thermal conductivity analyzers are calibrated at the factory for a specific
application using a known gas mixture that is representative of the
customers’ process. Using this instrument to analyze any other gas mixture
may result in serious error. Consult the factory for additional information
for gas analysis not specified at the time of purchase.

Instrument Serial Number: _______________________

Instrument Range: _______________
Calibrated for: _______________
Background Gas: _______________
Zero Gas: _______________
Span Gas: _______________

Teledyne Analytical Instruments iii

2000 XTC

Safety Messages

Your safety and the safety of others is very important. We have
provided many important safety messages in this manual. Please read these
messages carefully.

A safety message alerts you to potential hazards that could hurt you or
others. Each safety message is associated with a safety alert symbol. These
symbols are found in the manual and inside the instrument. The definition
of these symbols is described below:

GENERAL WARNING/CAUTION: Refer to the instructions
for details on the specific danger. These cautions warn of
specific procedures which if not followed could cause bodily
Injury and/or damage the instrument.

CAUTION: HOT SURFACE WARNING: This warning is specific
to heated components within the instrument. Failure to heed the
warning could result in serious burns to skin and underlying
tissue.

WARNING: ELECTRICAL SHOCK HAZARD: Dangerous voltages
appear within this instrument. This warning is specific to an
electrical hazard existing at or nearby the component or
procedure under discussion. Failure to heed this warning could
result in injury and/or death from electrocution.

Technician Symbol: All operations marked with this symbol
are to be performed by qualified maintenance personnel only.

No

Symbol

CAUTION:

NOTE: Additional information and comments regarding a
specific component or procedure are highlighted in the form of a
note.

THE ANALYZER SHOULD ONLY BE USED FOR THE
PURPOSE AND IN THE MANNER DESCRIBED IN THIS
MANUAL.

Teledyne Analytical Instruments iv

Thermal Conductivity Transmitter

IF YOU USE THE ANALYZER IN A MANNER OTHER
THAN THAT FOR WHICH IT WAS INTENDED,
UNPREDICTABLE BEHAVIOR COULD RESULT
POSSIBLY ACCOMPANIED WITH HAZARDOUS
CONSEQUENCES.

This manual provides information designed to guide you through the
installation, calibration operation and maintenance of your new analyzer.
Please read this manual and keep it available.

Occasionally, some instruments are customized for a particular
application or features and/or options added per customer requests. Please
check the front of this manual for any additional information in the form of
an Addendum which discusses specific information, procedures, cautions
and warnings that may be peculiar to your instrument.

Manuals do get lost. Additional manuals can be obtained from
Teledyne at the address given in the Appendix. Some of our manuals are
available in electronic form via the internet. Please visit our website at:
www.teledyne-ai.com.

Teledyne Analytical Instruments v

2000 XTC

Table of Contents

List of Figures viii
List of Tables ix
Introduction………………………………………………………………1

1.1 Overview 1

1.2 Typical Applications 1

1.3 Main Features of the Transmitter 2

1.4 Operator Interface 2

Operational Theory……………………………………………………...5

2.1 Introduction 5

2.2 The Thermal Conductivity Sensor 5

2.3 Sample System 7

2.4 Electronics and Signal Processing 9

2.4.1 Transmitter 9

2.4.2 Galvanic Isolator 10

2.5 Connection Cable 11

Installation………………………………………………………………12

3.1 Unpacking the Transmitter 12

3.2 Mounting the Transmitter 13

3.3 Mounting the Interface Unit 13

3.4 Gas Connections 14

3.5 Electrical Connections 15

3.6 Calibration 17

3.6.1 Adjusting Internal Temperature 18

3.6.2 Zero Calibration 19

3.6.3 Span Calibration 20

Teledyne Analytical Instruments vi

Thermal Conductivity Transmitter

Maintenance…………………………………………………………….22

4.1 Routine Maintenance 22

4.2 Troubleshooting 22

4.3 Fuse Replacement 24

Appendix………………………………………………………………...26

Specifications 26
Recommended Spare Parts List 28
Reference Drawings 28

Index……………………………………………………………………...29

Teledyne Analytical Instruments vii

2000 XTC

List of Figures

Figure 1-1: XTC Transmitter Modules…………………………………..3
Figure 2-1: Thermal Conductivity Sensor ………………………………6
Figure 2-2: Recommended External Sample System…………………8
Figure 2-3: Internal Piping………………………………………………..8
Figure 2-4: Block Diagram of 2000 XTC………………………………..9
Figure 2-5: Model 2000 XTC External Wiring Diagram……………..11
Figure 3-1: Mounting Dimensions for Sensor Unit…………………...13
Figure 3-2: Mounting Dimensions for Interface Unit…………………14
Figure 3-3: Power and Output Connections to Galvanic Isolator…..16
Figure 3-4: Cable Connection to Galvanic Isolator Module…………16
Figure 3-5: Temperature and Calibration Adjustment Location…….18
Figure 4-1: Cable Identification in Transmitter………………………..24
Figure 4-2 Fuse Location………………………………………………25

Teledyne Analytical Instruments viii

Thermal Conductivity Transmitter

List of Tables

Table 3-1: Heater Temperature…………………………………..19
Table 3-2: Concentration from Output Current………………….21

Table 4-1 Troubleshooting………………………………………...222
Table 4-2: Fuses……………………………………………………244

Teledyne Analytical Instruments ix

2000 XTC

DANGER

COMBUSTIBLE GAS USAGE

This instrument is approved as an intrinsically safe gas
analyzer for usage in a category (ib) Group IIC hazardous area.
This approval applies only to the equipment specified and
installed in accordance with the information contained within
this manual. It is the customer's responsibility to ensure
safety, especially when combustible gases are being analyzed
since the potential of gas leaks always exists.

WARNING

The customer should ensure that the principles of operating of
this equipment are well understood by the user and that the
instrument as well as any approved support equipment is
properly installed. Misuse of this product in any manner,
tampering with its components, or unauthorized substitution of
any component may adversely affect the certification and
safety of this instrument.

Since the use of this instrument is beyond the control of
Teledyne, no responsibility by Teledyne, its affiliates, and
agents for damage or injury from misuse or neglect of this
equipment is implied or assumed.

Teledyne Analytical Instruments x

Thermal Conductivity Transmitter Introduction

Introduction

1.1 Overview

The Teledyne Analytical Instruments 2000 XTC Thermal Conductivity
Transmitter is an instrument designed to analyze the gas concentration of a
binary gas mixture. This manual covers the CENELEC/ATEX approved
model 2000 XTC Thermal Conductivity Transmitter. These units are rated as
intrinsically safe and may be used in Class I, Group A, B, C, D, Div. 1 (North
America) and EEx ib IIC T3 (IEC/Europe) hazardous environments.

1.2 Typical Applications

The 2000 XTC Thermal Conductivity Transmitter is versatile. It is
capable of measuring the gas concentration of a species in a binary or
pseudo-binary mixture of gases over a concentration range. The specific
species and gas mixture as well as the analysis range employed is fixed
at the factory for your specific application. Typical applications for this
transmitter include:

Determining the gas concentration of a binary gas, for

•

instance, Ar or N2 in air

•

Analyzing the methane (CH4) concentration in natural gas
(80-100% CH4) sample

•

Analysis of H2 in various backgrounds

•

CO2 safety monitoring

•

Specific gas mixer and process control applications

•

Semiconductor manufacturing

•

Petrochemical process control

•

Quality assurance

Typical instrument ranges for this instrument include:

•

H2 in N2 (or air)

0-5%, 0-8%, 0-10%, 0-20%, 0-100%

Teledyne Analytical Instruments 1

Introduction 2000 XTC

He in N2 (or air) •

0-5%, 0-8% 0-10%, 0-30%, 0-100%

Natural Gas in Methane

•

0-20%, 0-50%, 0-100%

Nitrogen (or air) in CO2

•

0-10%, 0-20%, 0-50%, 0-100%

1.3 Main Features of the Transmitter

The 2000 XTC Thermal Conductivity Transmitter is sophisticated
yet simple to use. It provides a 4-20 mA output signal proportional to
the concentration of one component of a gas mixture. The signal is
based on the difference between the thermal conductivity of the sampled
gas compared to calibration points. The main features of the analyzer
include:

Integral isolated safety barrier classified as intrinsically safe

•

for hazardous area use.
Nema 4X, IEC 60529 and IP 66 rated sensor housing

•

ATEX approved for EEx ib IIC T3 (Europe)

•

4-20 mA signal output proportional to the concentration of

•

one of the gases in the mixture.
Long-lifetime solid state thermal conductivity sensor

•

•

Temperature controlled cell block provides excellent zero
and span stability over a wide temperature range

•

Versatile analog signal processing IC.

•

Easy installation

1.4 Operator Interface

The user does not interact with the transmitter directly. The
standard 2000 XTC Thermal Conductivity Transmitter provides a 4-20
mA output signal proportional to the concentration of the gas being
analyzed. This signal can be used to drive devices such as displays,
concentration alarms, user-supplied devices, or it can be monitored
using a chart recorder.

Teledyne Analytical Instruments 2