Bender ISOMETER isoEV425 Manual page 21

Function
Operating time
ae
The operating time t is the time required by the ISOMETER® to determine
ae
the measured value. The insulation resistance measured value depends on
the insulation resistance R and the system leakage capacitance C . High sys-
F e
tem leakage capacitances and system interferences lead to longer operating
times.
Response delay
on
The response delay t is set uniformly for all messages in the menu "t" using
on
the parameter "ton". This delay can be used for interference suppression in
the case of short measuring times. An alarm will only be signalled when a
threshold value of the respective measured value is violated for the period of
t without interruption. Every time the threshold value is exceeded within
on
the time t , the response delay "ton" restarts once again.
on
Every alarm message listed in the alarm assignment has its own timer for t .
on
Delay on release
off
The delay on release t can be set uniformly for all messages in the menu "t"
off
using the parameter "toff".
An alarm will continuously be signalled until the threshold value of the re-
spective measured value is not exceeded (including hysteresis) for the period
of t without interruption. Each time the threshold value is not exceeded for
off
the period of t , the delay on release t restarts once again. Every alarm mes-
off off
sage listed in the alarm assignment has its own timer for t .
off
Start-up delay
After connection to the supply voltage U the alarm indication is supressed for
S
the preset time (0...10 s) specified for parameter "t".
isoEV425_D00126_09_M_XXEN/03.2019 21