Teledyne API – Model T300/T300M CO Analyzer
Troubleshooting and Service
275
11.6.3.2.
ADJUSTING THE SYNC/DEMODULATOR, CIRCUIT GAIN
To adjust the sync/demodulator circuit gain:
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.
6. Remove the Sync/Demod Housing
•
Remove the two mounting screws.
•
Carefully lift the housing to reveal the sync/demod PCA.
Figure 11-19: Location of Sync/Demod Housing Mounting Screws
7. Adjust potentiometer VR1 until
CO MEAS
reads 4500 mV ± 300 mV
VR1
Adjustment Made Here
Figure 11-20: Location of Sync/Demod Gain Potentiometer
06864D DCN7562
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