Riken Keiki GD-3EC, Technical Manual

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6. Alarm Activation 6-1 Gas alarm activation
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6-1-2 Contact operation (auto reset)
If auto reset is set, the contacts will activate when the gas concentration reaches or exceeds the alarm setpoint.
The contact operation is automatically reset when the gas concentration falls below the alarm setpoint.
<Alarm pattern (H-HH)>
<Alarm pattern (L-H)>
<Alarm pattern (L-LL)>
(Oxygen deficiency alarm)
Normal Alarm Reset
■
ALM1 alarm lamp (red)
■
ALM2 alarm lamp (red)
■
ALM1 alarm contact
■
ALM2 alarm contact
Gas concentration
Normal Alarm Reset Alarm Reset
Gas concentration
■
ALM1 alarm lamp (red)
■
ALM2 alarm lamp (red)
■
ALM1 alarm contact
■
ALM2 alarm contact
Normal Alarm Reset
Gas concentration
■ ALM1 alarm lamp (red)
■ ALM2 alarm lamp (red)
■ ALM1 alarm contact
■ ALM2 alarm contact