Riken Keiki GD-3EC, Technical Manual

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7. Maintenance 7-3 Performing tests (test mode)
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7-3-2 Performing alarm test
Test to check whether an alarm is triggered when the reading reaches the alarm setpoint.
WARNING

Depending on the settings, contact and gas concentration outputs may be activated during alarm testing,
even in maintenance mode. Take care during alarm testing.
NOTE
 The procedure in step 3 is required even if the product is a no alarm relay model. Note that the contact
will not operate even when [on] is selected.
1 Press the ▲ or ▼ key in maintenance mode several times
to select [2-0], then press the SET key.
2 Press the ▲ or ▼ key to select [2-0.1], then press the SET
key.
3 Press the ▲ or ▼ key to select [oFF] or [on], then press the
SET key.
Select [on] if the setting for the contact used is alarm only or
alarm or fault, or [oFF] if the setting is other than those.
4 Press the ▲ or ▼ key to increase or decrease the reading.