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2750
User Manual
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Teledyne 2750 User Manual

Turbine Generator Gas Analyzer
OPERATING INSTRUCTIONS FOR
MODEL 2750
Turbine Generator Gas Analyzer
P/N M76700
4/09/2012
DANGER
for a time even after the power is turned off and disconnected. Only authorized personnel should conduct maintenance and/or servicing.
Before conducting any maintenance or servicing, consult with authorized supervisor/manager.
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Model 2750
Copyright © 2012 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 use r, an d serves as a tool b y 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 instrument or its interface, with the process being measured, be properly 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.
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Turbine Generator Gas Analyzer
Specific Model Information
The instrument for which this manual was supplied may incorporate one or more options not supplied in the standard instrument. Commonly available options are listed below, with check boxes. Any that are incorporated in the instrument for which this manual is supplied are indicated by a check mark in the box.
Instrument Serial Number: _______________________
Options Included in the Instrument with the Above Serial Number:
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Model 2750
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.
NOTE: Additional information and comments regarding a
No
Symbol
CAUTION: THE ANALYZER SHOULD ONLY BE USED FOR THE
specific component or procedure are highlighted in the form of a note.
PURPOSE AND IN THE MANNER DESCRIBED IN THIS MANUAL.
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Turbine Generator Gas Analyzer
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 and operation 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.
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Model 2750
Table of Contents
Safety Messages .......................................................................... iv
Table of Contents ......................................................................... vi
List of Figures ............................................................................. viii
List of Tables ................................................................................ ix
Introduction ................................................................................. 11
1.1 Overview 11
1.2 Analysis Ranges 11
1.3 Enclosure 12
1.4 Connections 13
1.5 Operator Interface 14
Theory of Operation ................................................................... 15
2.1 Thermal Conductivity 15
2.2 Electronics 17
Installation ................................................................................... 19
3.1 Electrical Connections 19
3.2 Gas Connections 20
3.2.1 Vent Line 21
3.2.2 Pressure Regulation 21
3.3 Calibration 22
3.3.1 Zero Calibration Procedure 23
3.3.2 Span Calibration Procedure 26
Setup and Operation ................................................................... 31
4.1 Setup 31
4.2 Operation 32
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Turbine Generator Gas Analyzer
Maintenance ................................................................................. 35
5.1 Routine Maintenance 35
5.1.1 Instrument Cleaning 35
5.1.2 Periodic Calibration 35
5.1.3 Leak Checking 35
5.2 Troubleshooting 36
Appendix ...................................................................................... 39
A.1 Specifications 39 A.2 Spare Parts List 40
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Model 2750
List of Figures
Figure 1-1: Front View of the Model 2750 ..................................... 12
Figure 1-2: Gas Connections ......................................................... 13
Figure 1-3: Electrical Connections ................................................. 13
Figure 1-4: Interface Panel ............................................................ 14
Figure 3-1: Electronics Block Diagram .......................................... 17
Figure 3-1: Electrical Connections ................................................. 20
Figure 3-2: Gas Connections ......................................................... 21
Figure 3-3: Interface Panel Showing Calibration Switch Position .. 23 Figure 3-4: Interface Panel Showing Calibration Switch Position .. 24
Figure 3-5: H2/CO2 Trim Pot ......................................................... 24
Figure 3-6: Cal Switch in H2/AIR Position ..................................... 25
Figure 3-7: H2/AIR Zero Trimpot ................................................... 25
Figure 3-8: Range Switch in AIR/CO2 Position ............................. 27
Figure 3-9: AIR/CO2 Span Trimpot ............................................... 27
Figure 3-10: Range Switch in H2/CO2 Position ............................. 28
Figure 3-11: H2/CO2 Span Trimpot ............................................... 28
Figure 3-12: Range Switch in H2/AIR Position .............................. 28
Figure 3-13: H2/AIR Span Trimpot ................................................ 29
Figure 4-1: Power and Output Connections to the Model 2750 ..... 32
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Turbine Generator Gas Analyzer
List of Tables
Table 2-1: Thermal Conductivity for Selected Gases .................... 15
Table 4-1: Troubleshooting ............................................................ 36
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Model 2750
DANGER
COMBUSTIBLE GAS USAGE
This is a general purpose instrument designed for use in a non-hazardous area. It is the customer's responsibility to ensure safety especially when combustible gases are being analyzed. The potential for gas leaks always exist.
The operator of this equipment should fully understand the principles of operation for this instrument. Misuse of this product in any manner, tampering with its components, or unauthorized substitution of any component may adversely affect the safety of this instrument.
WARNING
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.
WARNING: USING NON-COMBUSTIBLE GASES CAN EXPOSE
THE USER TO THE RISK OF ASPHYXIATION. ALWAYS USE CAUTION WHEN WORKING WITH ANY GAS IN CONTAINED AREAS; MAKE SURE THERE IS PROPER VENTILATION AVAILABLE IN THE WORK AREA. TAI RECOMMENDS THE USE OF SAFETY MONITORS TO ENHANCE USER SAFETY.
WARNING: THERE ARE NO USER SERVICEABLE PARTS
CONTAINED IN THIS ANALYZER. FOR SERVICE OR REPAIR, CONTACT TELEDYNE ANALYTICAL INSTRUMENTS FOR QUALIFIED SERVICE PERSONNEL OR AN RMA NUMBER.
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Turbine Generator Gas Analyzer Introduction
Introduction
1.1 Overview
The Model 2750 Turbine Generator Gas analyzer is a portable microcontroller based three-channel analyzer designed to measure the concentration of a single gas component in a binary mixture of gases. A special thermal conductivity cell responds to the difference in thermal conductivity between the components of a gas mixture and produces a signal output which is linearized over the specific range of interest. Each channel is separately linearized for enhanced accuracy. The cell is maintained at a fixed temperature to minimize any thermally induced error.
This analyzer is specifically designed for use during the maintenance of turbine generators. The three ranges allow the user to monitor the turbine’s blanketing gas as the turbine is in use or during maintenance. It provides a range of 80%- 100% hydrogen in a background (impurity) of air for hydrogen purity monitoring. Two ranges, 0-100% hydrogen in a background of CO background of CO2 are used to monitor the blanketing gas during the purge cycles. During normal operation the turbine is blanketed with 100% hydrogen. For maintenance the hydrogen is first purged from the enclosure with CO2 for fire safety. This process is followed by an air purge for worker safety. This process is reversed prior to bringing the turbine back into service.
, and 0-100% air in a
2
1.2 Analysis Ranges
The Model 2750 has 3 separate user selectable analysis ranges controlled by a 3-position rotary switch.
Standard analysis ranges include:
0-100% hydrogen in CO2  0-100% air in CO2  80-100% hydrogen in air
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Introduction Model 2750
The thermal conductivity sensor senses the thermal conductivity (T/C) or heat transfer rate of the sampled gas mixture and produces an electrical signal proportional to its heat conductivity. The T/C of the two gases in the mixture are significantly different. Because of this difference, the T/C of the gas mixture will be proportional to the percentage of each gas in the mixture. The resulting raw signal from the sensor is linearized and ultimately converted into a concentration readout on the digital display. Although it is possible to obtain a digital readout using almost any binary mixture of gases with a reasonable thermal conductivity difference, this instrument is designed and internally calibrated for only those gases and analysis ranges listed above. Any other mixture will produce erroneous results. Contact the factory if your application requires an analysis range not listed above.
1.3 Enclosure
The Model 2750 is a portable instrument housed in a rugged impact resistant NEMA 4X polyethylene enclosure which can easily be set up at the point of analysis and field-calibrated. The top of the case opens to reveal the operator interface panel. The analysis section is located in the cover section of the enclosure. See Figure 1-1.
Figure 1-1: Front View of the Model 2750
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