
Gas Monitor 1ACO One-Channel Monitor
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PRODUCT DESCRIPTION
3.1 GENERAL DESCRIPTION
The Gas Monitor 1ACO monitor is a one channel gas monitoring system incorporating state of
the art sensing technology using micro-controller based design to provide continuous, reliable
surveillance of surrounding air for traces of hazardous gases (listed in Section 2). The monitor
comes with the following features, see Figures 1 and 2.
3.1.1 MONITOR FEATURES
1. RUN/FAULT/OFF INDICATOR:
A green LED
RUN: LED on
FAULT: LED flashing
OFF: LED off
2. WARNING INDICATOR:
Warning levels of gas are indicated by a yellow LED.
Warning concentrations are indicated in Section 2
3. ALARM INDICATOR:
Alarm levels of gas are indicated by a red LED. Alarm
concentrations are indicated in Section 2
4. POWER TERMINAL BLOCK:
For line voltage connections of 120 VAC, 60 Hz
5. TRANSFORMER:
A Class II, step down transformer powers the internal
circuitry and remote sensor at low voltages. Located
underneath the PCB
6. INTERNAL WIRING HEADER:
Provides wiring connection points as follows:
1,2,3
- Relay coils
4,5,6,7,8
- Reserved
9,10
- Acknowledge switch
11,12
- Audio alarm indicator
7. AUDIO ALARM INDICATOR:
The buzzer will activate for Alarm, Warning
(configurable) and fault conditions, with a distinct tone
for each one
8. RELAY SETUP JUMPERS:
Used to independently configure the Warning and Alarm
relays as Normally Energized or Non-Energized
9. TEST SWITCH:
The test switch is provided to electronically simulate
alarms in order to test audio and relay functions
10. TRIP POINT ADJUSTMENT:
Sets the Signal adjust, Alarm and Warning
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