Operation and setting
55
IRDH575_D00089_05_M_XXEN/01.2020
6.5 ISO ADVANCED menu: Setting of the extended
functions
6.5.1 External coupling device (AGH: no = factory setting)
Coupling devices cannot be connected to the IRDH575.
6.5.2 Selecting the system leakage capacitance range
This menu allows to select the maximum system leakage capacitance C
e
max.
You can select between two different ranges: 150 µF or 500 µF. Adaptation
within the selected range is carried out automatically. Please note that the ba-
sic measuring time will be increased to approximately 10 seconds when the
setting is C
e
= 500 µF. Please also consider C
e
max for the EDS-System, refer to
curves at page 104. Factory setting = 150 µF.
6.5.3 Changing the measuring principle from AMP to DC
(Measure: AMP)
The DC measuring principle (reduced measuring time) is only suitable for pure
AC systems. Factory setting = AMP.
6.5.4 Setting the repetition time for automatic self tests
(Autotest: 24h)
The time for the repetition of automatic self tests can either be set to 1 hour
or to 24 hours or can be deactivated. Factory setting = 24 h
6.5.5 Setting the real-time clock (Clock)
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.
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