Delta OHM HD2817T Series, Manual

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20mA, and the measured temperature exceeds 100°C or is lesser than 0°C, an error is
generated.
You can select multiple error sources: any of them can trigger the alarm.
You can set a delay before generation of an alarm ( Delay ). During this time the relay does not
switch and no alarm is signalled. The alarm time is expressed in seconds. If you set this
parameter to 0, there is no trigger delay. For example, if you set 10 seconds, the alarm
triggers after 10 seconds if the error condition persists during this time.
Position of the relay RL3 contact in case of alarm:
Mode “ Energized on error ”: in normal conditions the relay contact is open. In case of alarm,
the contact will close.
Mode “ De-energized on error ”: in normal conditions the relay contact is closed. In case of
alarm, the contact will open. This condition can be used to check the correct power supply
of the instrument: indeed, as soon as it is interrupted, the instrument turns off and the
relay RL3 contact opens. The opening can generate an alarm through an external device.
Mode “ Force OFF ”: it blocks the relay contact in the always-open state.
Mode “ Force ON ”: it blocks the relay contact in the always-closed state.