MODEL 275R POR TABLE ORT TURBINE GENERA TOR ENERAT PURGE GAS ANAL YZER NALYZER INSTR UCTION MANU AL NSTRUCTION ANUAL DANGER HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM. PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM. 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.
Copyright © 1999 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 917491580.
Table of Contents 1.0 INTRODUCTION 1.1 Features .............................................................................. 1.1 2.0 OPERATIONAL THEORY 2.1 Thermal Conductivity .................................................... 2.1 2.2 Electronic Components .................................................... 2.2 3.0 OPERATIONS 3.1 Front Panel.......................................................................... 3.1 3.1.1 Function Switch .................................................... 3.1 3.1.
Drawing List ........................................................................ A.4 CAUTION • • • Do not connect the instrument to a pressure source greater than psig. 30 psig This is a measurement instrument, NOT a safety instrument. This instrument is NOT explosion-proof or intrinsically safe and MUST NOT be used in hazardous areas.
Intr oduction 1.0 Introduction Intr oduction Introduction In order to help you make maintenance purging of turbine generators safer, Teledyne Analytical Instruments has developed the 275R Turbine Generator Purge Gas Analyzer. During maintenance of hydrogen-cooled turbine generators, the cooling gas (H2) is systematically replaced with carbon dioxide (CO2) and then air.
1.0 Intr oduction Introduction 1.
Operational Theor y 2.0 Theory Operational Theor y Theory The Model 275R Turbine Generator Purge Gas Analyzer can measure either the concentration of one component in a binary stream of gas, or the purity of a sample stream containing a composite mixture of impurities. 2.1 Thermal Conductivity The ability of a substance to conduct heat is called thermal conductivity.
2.0 Operational Theor y Theory During calibration, the bridge circuit is balanced with the reference gas; the zero of each range is set with its zero gas and the high end of the range is adjusted with span gas. The intervening points along the range (or ranges) of interest will produce a DC electrical signal representative of the analysis. 2.2 Electronic Components The temperature of the measuring and reference cell block is regulated to within 0.
Operations 3.0 Operations 3.1 Front Panel 3.1.1 Function Switch This switch is used to select the gas mixture range to agree with the composition of the sample. Gas compositions for which your analyzer is intended are hydrogen and carbon dioxide (0-100% H2 in CO2), or air and carbon dioxide (0-100% air in CO2), or purity of hydrogen (e.g. 90-100% H2 with 0-10% impurities). 3.1.
3.0 Operations 3.1.6 Analog Meter The meter has three scales: • 0-100% H2 in CO2 (green). • 0-100% air in CO2 background (black). • 90-100% H2 in air (red). The output of the circuitry for the 0-100% H2 in CO2 scale is nonlinear with the most sensitive area being at the low end. The other two scales are almost linear. A special meter dial is provided with markings located to accommodate these non-linearities so that extrapolation is not required. 3.1.7 Analog Output A 0-1 VDC output is provided.
Operations 3.0 2. With a mixture of 90% H2 and 10% N2 flowing through the analyzer, adjust the zero control potentiometer to read zero on the meter for Range 3. 3. With 100% H2 flowing through the cell, adjust the span controls to read full scale output in Ranges 1 and 3. 4. With air flowing through the cell, adjust the span control to read full scale output in Range 2. After calibration has been successfully concluded, connect the sample gas to the analyzer, and adjust the flow to approximately 0.
3.0 Operations 3.
Installation 4.0 Installation 4.1 Location WARNING: This instrument is not explosion-proof or intrinsically safe, and MUST NOT be used in hazardous areas. The instrument should be installed where it will not be subjected to: • direct sunlight. • drafts. • shock and vibration. • temperatures below 30 °F or above 110 °F. The analyzer should be placed as close as possible, subject to the above conditions, to the sample point, to minimize the effects of sample line lag time on the analysis.
4.0 Installation 4.3 Gas Connections The gas inlet and outlet connections are 1/8" tube fittings located on the upper left-hand corner of the rear panel. NOTE: Reducing-type pressure regulators will have to be installed at all gas supply sources. 4.3.1 Gases Air, hydrogen, carbon dioxide and a mixture of 10% nitrogen in hydrogen are needed to calibrate the unit. * WARNING: Hydrogen is a highly flammable gas. Care should be taken not to store it near flames or flammmable materials.
Installation 4.0 4.4 Pressure Regulation The following precautions must be observed for the incoming gas lines: a) The incoming gas line should be equipped with a pressure regulator. b) The sample line pressure regulator should be installed as close to the sample point as possible, to minimize sample line lag time. c) Sample pressure should be set somewhere between 5 and 30 psig psig; 10 psig is nominal.
4.0 Installation 4.
Maintenance & Troub leshooting 5.0 oubleshooting Maintenance & Troub leshooting oubleshooting Since no moving parts are used in the analyzer, no routine maintenance is required, other than checking the gas flow rate periodically. Symptom Cause What To Do 1. No output. a) Bad fuse. a) Check and replace fuse. b) The power supply of +15V and -15V may be defective. b) If faulty, change the power supply board. c) The bridge power supply (100 mA) may be defective.
5.0 Maintenance & Troub leshooting oubleshooting 5.
Appendix Appendix Specifications Ranges: Sealed reference gas: 0–100% H2 in CO2 0–100% air in CO2 90–100% H2 in air Helium Zero drift: <1% per day Accuracy: ±5% of full scale or better, depending on the range selected. Response time: Sample flowrate: Area classification: Signal output: Meter readout: 90% in 50 seconds. 0 to 0.5 SCFH. General purpose (non-hazardous) areas. 0 to 1 VDC. mVDC output also available. Integral analog meter. Operating temperature: +32 to +125 °F (0 to +52 °C).
Appendix Calibration Data Serial Number: Ranges: Output Signal: Recommended Zero Gases: 0-100% H2 in CO2 0-100% air in CO2 90-100% H2 in air 0-1 VDC 100% CO2 90% H2 with 10% N2 Recommended Span Gases: 100% H2 100% air Reference Gas: A.
Appendix Recommended Spare Parts List P/N QTY. DESCRIPTION C-51407 1 PC board, measurement B-30927 1 PC board, amplifier A-9306 1 PC board, power supply B-73363 1 Cell block assembly F9 5 Fuse, 1 amp H158 1 Heater, 18 watt cartridge type A minimum charge of $150.00 is applicable to spare parts orders. IMPORTANT: Orders for replacement parts should include the part number (if available) and the model and serial number of the system for which the parts are intended.
