Equipment Required; Calibration - AMC 1ACO Instructions Manual

Table 6: Test points and trimpots allocation
Reference Points
Signal
Test Points
WARNING
ALARM
Ground
WARNING
Trimpots
ALARM
Span
FIGURE 8: Gas Monitor 1ACO Test Points and Trimpots.
The AMC-S2e supplies a linear 1.0 to 3.3V DC signal to the monitor. This translates to a 0.4 to
1.32 volt DC signal at TP4.
transmitters full scale calibration. The WARNING threshold is set using trimpot RV5. The
ALARM threshold is set using trimpot RV6.

5.6.1 Equipment Required

•
Digital multimeter with a minimum display range of 0 to 10.0 VDC.
•
Miniature screwdriver trimmer adjustment tool.
•
Zero & Span gases (contact AMC for information)

5.6.2 Calibration

The AMC-S2e is delivered already calibrated from the factory. When the AMC-S2e-CO is
calibrated, it will have a 3.3V at TB1 (or 1.32V at TP4) output in the presence of 100 PPM CO
gas. The zero gas output of the AMC-S2e varies from unit to unit. This calibration procedure
Gas Monitor 1ACO One-Channel Monitor
Sensor
TP4
TP5
TP6
TP7
RV5
RV6
R1
The alarms are set to correspond to some fraction of the
R1
TP7
1
JB8
JB10
TB1
16
TP6
RV6
RV5
TP5
TP4