Riken Keiki GD-3EC, Technical Manual

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6. Alarm Activation 6-1 Gas alarm activation
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6
Alarm Activation
6-1 Gas alarm activation
6-1-1 Alarm activation
The product issues an alarm when the detected gas or oxygen concentration reaches or exceeds the alarm
setpoint. (Auto reset or self-latching)
NOTE
 The alarm setpoints (first and second alarms) and alarm pattern (auto reset or self-latching) are set at the
factory before shipping.
 An alarm delay time (default setting: 2 seconds) is set to prevent accidental alarm activation. This should
be canceled if not required.
<Gas concentration display>
If the reading exceeds the detection range (full scale exceeded), “∩∩∩∩” appears on the LED display.
<Power/alarm lamp display>
The alarms are two-step alarms. The alarm lamps light up when the corresponding alarm setpoint is reached or
exceeded.
The alarm lamps (ALM1 and ALM2) light up in red. The display appears as follows.
The power lamp (POWER) remains lit in green.
<First alarm> <Second alarm>
ALM1 lit (red) ALM1 and ALM2 lit (red)
NOTE
 If the alarm pattern is set to self-latching, the alarm will continue even when the gas concentration falls
below the alarm setpoint.
Operate the keys to cancel the alarm state after confirming that there is no gas present in the vicinity.
Alarm lamp (ALM1)
Alarm lamp (ALM2)
Alarm lamp (ALM1)