Operation and setting
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IRDH375_D00124_05_M_XXEN/01.2020
6.5.5 Setting the real-time clock (Clock) (IRDH375B)
The setting of the real-time clock is the time base for the memory and for the
automatic self test. In case of failure of the supply voltage, the real-time clock
keeps running for approximately 30 days. When the device will be switched
on after this period, a flashing "C" appears on the display and the clock has to
be set again.
6.5.6 Setting the date (Date) (IRDH375B)
As well as the time, the date is required for the memory, too. In the event of
power supply failure, the date function is not influenced for at least 30 days. If
the device is switched on again after this period, a new setting of date and
time of the real-time clock is required.
6.5.7 Specifying the starting time of the automatic self test (Test)
(IRDH375B)
If the 24h self test is activated in the ISO ADVANCED menu, it is possible to set
the time (hour) when the self test is to be carried out by means of the
"TEST: 12:00" sub menu. Then the self test is automatically carried out once a
day at a given time. If the 1 hour auto test has been selected, the self test will
be carried out at every full hour.
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