AMC 1022M Series Instruction Manual page 17

NOTE
THE FOLLOWING PROCEDURE IS FOR REMOTE SENSOR ONLY. IF A TRANSMITTER IS
USED, REFER TO ADJUSTMENTS IN CALIBRATION SECTION 3.2 IN THE APPROPRIATE
TRANSMITTER MANUAL.
The low alarm adjust is used to establish the low alarm trip point. This is done by exposing the sensor being
calibrated to the low alarm gas concentration and adjusting the LO trimmer clockwise until the yellow LED
just lights.
The high alarm adjust is used to establish the high alarm trip point. This is done by exposing the sensor
being calibrated to the high alarm gas concentration and adjusting the HI trimmer clockwise until the red
LED just lights.
NOTE
IF A SENSOR HAS BEEN REPLACED, ADJUST THE SIGNAL FIRST AND THEN PROCEED
WITH LOW ALARM AND HIGH ALARM ADJUST. SIGNAL CALIBRATION IS PERFORMED
USING A DIGITAL MULTIMETER SET TO MEASURE DC VOLTAGES TO TWO (2)
DECIMAL PLACES (E.G. 0.00 V).
The signal adjust is used to set the sensitivity of a sensor. This is done by exposing the sensor to the low
alarm concentration of gas. The voltage associated with signal can be measured at the test point
immediately above and to the left of the SIG trimmer as shown in Figure 3-1. The voltage measured at the
signal test point should be approximately 3.0 volts.
AMC- - - - 1022M AMC AMC AMC 1022M 1022M 1022M
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