Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 284)

Troubleshooting and ServiceTeledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 284
10. Remove the one (1) screw fastening the GFC Wheel/mask assembly to the GFC
motor hub.
11
12
Figure 12-18: Removing the GFC Wheel
11. Remove the GFC Wheel/mask assembly.
12. Follow the previous steps in reverse order to put the GFC Wheel/motor assembly
back together.
12.6.3. CHECKING AND ADJUSTING THE SYNC/DEMODULATOR,
CIRCUIT GAIN (CO MEAS)
12.6.3.1. CHECKING THE SYNC/DEMODULATOR CIRCUIT GAIN
The GFC7001T/GFC7001TM Analyzers will operate accurately as long as the
sync/demodulator circuit gain is properly adjusted. To determine if this gain factor is
correct:
1. Make sure that the analyzer is turned on and warmed up.
2. Set the analyzer display to show the STABIL or CO STB test function.
3. Apply Zero Air to Sample Inlet of the analyzer.
4. Wait until the stability reading falls below 1.0 ppm.
5. Change the analyzer display to show the CO MEAS
 The value of CO MEAS must be > 2800 mV and < 4800 mV for the
instrument to operate correctly.