Thermo Scientific TVA-1000B Instruction Manual - Geotech ...
Thermo Scientific TVA-1000B Instruction Manual - Geotech ...
Thermo Scientific TVA-1000B Instruction Manual - Geotech ...
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MI 611-185 – June 1996<br />
Theory of Operation<br />
AMPLIFIER<br />
PID 00000 PPM<br />
FID 00000 PPM<br />
%<br />
METER<br />
<strong>TVA</strong>-<strong>1000B</strong><br />
PID<br />
FID<br />
EXHAUST<br />
COLLECTOR<br />
ELECTRODE<br />
FLAME ARRESTOR<br />
LAMP<br />
JET<br />
IGNITION<br />
FILAMENT<br />
VENT<br />
AIR SAMPLE OUT<br />
COLLECTOR<br />
ELECTRODE<br />
AIR SAMPLE IN<br />
AIR SAMPLE IN<br />
HYDROGEN SUPPLY<br />
Figure 4. <strong>TVA</strong>-<strong>1000B</strong> Dual Detector Configuration<br />
Concentration Calculation and Calibration<br />
The concentration calculation is defined as the process that transforms a detector count into a<br />
displayed final concentration. The process is as follows:<br />
DETECTOR COUNT TRANSLATED INTO A STANDARD DETECTOR CONCENTRATION<br />
USING A DETECTOR COUNT VS. DETECTOR CONCENTRATION CALIBRATION CURVE.<br />
STANDARD DETECTOR CONCENTRATION IS CORRECTED TO A SPECIFIC GAS USING<br />
THE INSTRUMENT RESPONSE FACTOR.<br />
SPECIFIC GAS CONCENTRATION IS BACKGROUND CORRECTED (IF ENABLED)<br />
INSTRUMENT RESPONSE FACTOR AND BACKGROUND CORRECTED CONCENTRA-<br />
TION IS RF CORRECTED USING THE CURRENT ROUTE ENTRY RF (IF ANY)<br />
FINAL CONCENTRATION READING<br />
10
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