Operation and configuration
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isoLR275_D00127_00_M_XXEN/07.2018
5.4 Menu ISO SETUP: Setting of the basic
ISOMETER® functions
This menu is used to set the alarm functions Alarm1 and Alarm2 (prewarning
and alarm), the operating principle of the alarm relays K1 and K2 (N.O = N/O
operation, N.C = N/C operation), the fault storage behaviour and a selection of
two current output ranges.
For UL applications:
In order to ensure the proper functioning of the relay outputs, a manual, peri-
odic self-test where the relay outputs are switched, has to be carried out by
the user (delivery condition).
5.4.1
Response values Alarm1 and Alarm2
The response values Alarm1 and Alarm2 are selected with the Up/Down
button and stored with the Enter button.
5.4.2
Operating principle of the alarm relays
K1/K2 are factory-set to N.O Test, that means N/O operation. When the
supplement "Test" has been selected, the alarm relays switch over during a
manual self test.
If the operating principle of the alarm relays does not have to be changed
during a manual self test for any reason, N.C or N.O. has to be selected.
K1: N.C Test
= N/C operation contacts 11-12-14, with relay test
(the alarm relay is energised during normal operation)
K1: N.O Test
= N/O operation contacts 11-12-14, with relay test
(the alarm relay is deenergised during normal operation)
K1: N.C
= N/C operation contacts 11-12-14, without relay test
(the alarm relay is energised during normal operation)
K1: N.O
= N/O operation contacts 11-12-14, without relay test
(the alarm relay is deenergised during normal operation)
K1: Flash
= Flashing function contacts 11-12-14
(The alarm relay switches and the LED flashes in the event
of an alarm message at approx. 0.5 Hz)
