8. Alarm Function
8-1. Gas alarm activation
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8.
Alarm Function
8-1. Gas alarm activation
"Gas alarm" is triggered in the gas detector with a blinking alarm lamp, buzzer sound and blinking gas
concentration display when the concentration of detected gas reaches or exceeds the alarm setpoint
values. (Auto-reset operation)
When the gas concentration falls below the alarm setpoint, the alarm activation will be reset automatically.
There are two types of gas alarm: first alarm (WARNING) and second alarm (ALARM).
To enable gas alarm, set it to ON and specify an alarm setpoint using “Alarm setpoint setting” (P. 46) in the
user mode.
Alarm type
First alarm
Second alarm
Alarm lamp
Repeatedly blinks at about one-second
intervals.
Repeatedly blinks at about 0.5-second
intervals.
Buzzer
Repeatedly sounds strong and weak
beeps at about one-second intervals.
Repeatedly sounds strong and weak
beeps at about 0.5-second intervals.
LCD display
Gas concentration and WARNING blink
Gas concentration and ALARM blink
<Alarm Pattern of Lamp and Buzzer>
A slow or quick intermittent operation is performed depending on the alarm type.
1-second interval
0.5-second interval
Second alarm setpoint
First alarm
setpoint
Tim
Alarm lamp
Buzzer
Co
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