AMC 1ACO, Инструкция по эксплуатации, Страница: 18 / 22

Gas Monitor 1ACO One-Channel Monitor
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Table 6: Test points and trimpots allocation
Reference Points Sensor
Signal TP4
WARNING TP5
ALARM TP6
Test Points
Ground TP7
WARNING RV5
ALARM RV6 Trimpots
Span R1
TB1
TP7
RV6
R1
RV5
TP4
TP5
TP6
JB8
JB10
1
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. The alarms are set to correspond to some fraction of the
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