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SECTION 5
Clipping Fault Adjustment
Locate R-34 Gain adjust potentiometer. Adjust DETECTOR voltage using the Diagnostic screen
until the voltage is 4.24 volts. If the reference voltage is properly set, the clipping fault will go
away after the unit samples the next zone.
Note - It may take several minutes for a voltage change to appear on the diagnostic screen
due to the cycle time of the monitor from zone to zone.
If the clipping fault remains, the reference voltage must be verified and corrected if needed.
Locate TP1 (+) and TP2 (-) on the HGM300 main PC board (they are found to the left of R-33
the reference adjust potentiometer).
Connect a voltmeter to TP1 and TP2. Use R-33 (Ref. Adj.) to adjust the reference voltage to
5.000VDC +/- 0.002.
SECTION 6
TP1 (+)
TP2 (-)
R34 - Gain
A
djust
R33 - Reference Adjust
5.000 VDC +/- 0.002 VDC
Rev 3/2/09
10