Bender ISOMETER IRDH275, Manual

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Operation and setting
50 IRDH275_D00122_03_M_XXEN/05.2017
6.4 Menu ISO SETUP: Setting of the basic ISOMETER®
functions
All alarm functions such as Alarm 1 and Alarm 2 (prewarning and main alarm),
the operating principle of the alarm relays K1 and K2 (N.O = N/O operation,
N.C = N/C operation) and the fault storage behaviour are set in this menu. The
current output for the IRDH275B can be selected from two value ranges.
6.4.1 Response values Alarm 1 and Alarm 2
The response values Alarm 1 and Alarm 2 are selected with the UP/DOWN
keys and stored with the ENTER key.
6.4.2 Operating principle of the alarm relays
K1/K2 are factory set to N.O Test, that means N/O operation. When the supple-
ment "Test" has been selected, the alarm relays switch over during a manual
self test.
If, for any reason, the alarm relays may not switch over during a manual self
test, the settings N.C or N.O are to be selected.