Riken Keiki SD-1D-AS, Operating Manual

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6 Operations and Functions 6-1. Gas alarm activation
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6
Operations and Functions
6-1. Gas alarm activation
Gas alarm: Triggered when the concentration of detected gas reaches or exceeds the alarm setpoint value.
<<Auto-Reset>>
NOTE
The alarm setpoint is factory-set. Although the alarm delay time (standard: 2 seconds) works in the
detector to prevent a false activation, it can be cancelled if not needed.
<Display Operation>
Gas Concentration Display
In case of over the detection range (Over Scale), " ∩∩∩∩ " is displayed on the LED.
Power Indicator Lamp (POWER: Green)
During operation, this lights up continuously.
Alarm Indicator Lamp (ALM: Red)
It lights up when the alarm setpoint value is reached to or exceeded.
<Alarm Activation>
It lights up when the gas concentration reaches or exceeds the alarm setpoint value. (only when the alarm is
used)
The alarm activation is reset automatically when the gas concentration drops below the alarm setpoint
value.
Alarm delay time (2 seconds)
Alarm lamp (ALM)
Alarm setpoint C
onc
en
tr
ation
0
Time