Teledyne 9700 instruction manual Response of Combustible Sensor to Various Gases

Page 49

 

 

Flue Gas Analysis System

Appendix

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Response of Combustible Sensor to Various Gases

Response factors have been determined to relate the sensor output of a specific compound to the output obtained using methane. A list of some typical compounds is given in Table 1 along with their LEL (Lower Expo- sure Limits) values. To determine the output of the sensor for any of the gases listed, compared to the same concentration of methane, multiply the reading obtained by the factor listed. For example, if the output is cali- brated with methane at 2%, the output for ethylene at 2% would be 2.0% X 1.26 = 2.52% methane equivalent.

TABLE 1: Detector Response To Various Gases

COMPOUND

LEL*

RESPONSE FACTOR

Methane

5.0

1.00

Hydrogen

4.0

0.86

Carbon Monoxide

12.5

0.32

Ethane

3.0

1.20

Ethylene

2.7

1.26

Acetylene

0.5

1.39

Propane

2.2

1.42

Propylene

2.0

1.33

Butane

1.9

1.54

Hexane

1.1

1.50

Cyclohexane

1.3

1.44

Heptane

1.05

1.59

Benzene

1.3

1.50

Pentane

1.5

1.45

Toluene

1.2

1.48

Ethylene oxide

3.6

0.76

Methyl Ethyl

1.8

0.96

Ketone

 

 

Methyl Acrylate

2.8

0.59

*Taken from Fire Hazard Properties of Flammable Liquids, Gases and Volatile Solids, National Fire Protection Agency.

NOTE: For compounds not listed in Table 1, consult the factory.

TELEDYNE BROWN ENGINEERING

A-5

Analytical Instruments

Image 49
Contents Model Flue Gas Analysis System Important Notice WarrantyTable of Contents Maintenance & Troubleshooting Introduction Flue Gas Analysis SystemOverview Sample Conditioning General InformationSample Conditioning Oxygen Analyzer Section Standard FeaturesOxygen Analyzer Section General Information Optional Features General Information Combustible Gas Analyzer Section Combustible Gas Analyzer SectionGeneral Information Compound LEL Response Factor Operating Controls and Indicators Meter Trim Recessed Secondary ControlsAnalog Output Current MAX Load Output Impedance Oxygen Analyzer Theory of OperationTheory of Operation Combustible Analyzer Detector Flue Gas Analysis System Theory of Operation Power InstallationOutput Signal Voltage Electrical ConnectionsInterconnection Diagram Output Signal Current Alarm and/or Control CircuitryInstallation Startup of Oxygen Analyzer OperationPreliminary Meter ZeroingInitial Calibration and Equilibration Flue Gas Analysis System Operational Calibration Routine Operational Calibration ProcedureStartup of Combustibles Analyzer Operation System Startup Span GasAnalyzer Startup Sample System StartupOperation Maintenance Flue Gas Analysis System Maintenance & TroubleshootingRoutine Maintenance Oxygen Cell ReplacementCell Warranty Water Strainer Spray NozzleFilter Condensate Trap Combustible SensorPump TroubleshootingGeneral Oxygen Analyzer .2.2.1 Inability to Calibrate Inability to Calibrate Combustible Analyzer SectionNo Alarm With High Gas Level Lamp Failure Appendix SpecificationsOxygen Analysis Section Appendix ModelModel 9700 System Standard Unit Only Recommended Spare Parts ListReference Drawings Response of Combustible Sensor to Various Gases Appendix Model Supporting Equipment for Flue Gas Analysis Systems Figure A-1 Typical Dry Probe Maintenance General Maintenance for CC-2B Series PumpsRepair Appendix Model Flue Gas Analysis System Figure A-3 Pump Assembly Flue Gas Analysis System Figure A-4 Replacing Flex-I-Liner Replacing the Liner in the Flex-I-Liner PumpFlue Gas Analysis System