Password Protection (On, Off); External Test/Reset Button (T/R); 2.3.17 History Memory His - Bender ISOMETER isoCHA425 Manual

ISOMETER® isoCHA425
The delay on release t can be set uniformly for all alarm messages using the parameter 'toff', while each alarm
off
message specified in the alarm assignment has its own timer for t .
off
An alarm message will be signalled until the limit value of the respective measured value is no longer violated
(including hysteresis) for the duration of t without interruption. Each time a limit value is no longer violated
off
during t , the delay on release 'toff' restarts.
off
Start-up delay t
After connecting the supply voltage U , the alarm output is suppressed for the time set in parameter
S
't' (0...10 s).

2.3.15 Password protection (on, OFF)

If password protection is activated (on), settings can only be made after entering the password (0...999). For its
activation, see chapter 4.7.

2.3.16 External test/reset button (T/R)

Functions
• Reset = press the external button < 1.5 s
• Reset + self test = press the external button > 1.5 s
• Stop measuring function = press and hold the external button
When the measuring function is stopped, the display shows 'StP'.
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 controlled via an external test/reset button.
A galvanic parallel connection of several test or reset inputs for testing multiple insulation monitoring devices
is not allowed.

2.3.17 History memory HiS

The history memory saves exclusively the measured values for the first fault. The history memory must first be
cleared before new measured values can be saved.
The values checked in the table in section 'Displaying measured values' can be saved.
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