Function
22
isoEV425_D00126_09_M_XXEN/03.2019
3.2.7
Password protection
(on, OFF)
If password protection has been activated (on), settings can only be made
subject to the correct password being entered (0...999).
3.2.8
Factory setting FAC
Activating the factory settings will reset all modified settings - with the excep-
tion of the interface parameters - to the default values used when the device
was delivered.
3.2.9
External, combined test or reset button T/R
Reset = Press the external button < 1.5 s
Reset followed by a test = Press the external button > 1.5 s
Stop measuring function = Press and hold the external button
The stop function can also be triggered via an interface command and in this
case it can only be reset via the interface. Only one ISOMETER® may be control-
led via a test/reset button. A galvanic parallel connection of several test or re-
set inputs for testing multiple insulation monitoring devices is not allowed.
3.2.10 Fault memory
The fault memory can be activated or deactivated with the parameter "M" in
the menu "out". When the fault memory is activated, all pending LED and
alarm messages remain available until they are deleted by using the reset but-
ton (internal) or if the supply voltage
U
s
is turned off.
3.2.11 History memory HiS
When the first error occurs after clearing the history memory, all measured
values (that are marked in the table in
) are saved in the history
memory. This data can be read out using the "HiS" menu item. In order to be
able to record a new data record, the history memory must first be cleared via
the menu using "Clr".
