Bender ISOMETER iso1685DP, Руководство пользователя

Страница: 12 / 56

Function Function
iso1685DP_D00272_02_M_XXEN/07.2017
15
3.3.4 Deactivating the device
When the device is deactivated, the coupling unit of the device is galvanically isolated
from the system being monitored.
The device does not measure the insulation resistance, the message Device inactive ap-
pears on the display. The IT system is NOT being monitored!
The device uncouples itself from the system to be monitored through an internal system
isolating switch.
Activation or deactivation is done via
• a digital input
• the menu item Alarm settings
• the BMS bus
The standby mode of the ISOMETER®, for example, enables application in coupled sys-
tems, since in interconnected systems only one insulation monitoring device is allowed
to be connected in each system.
3.3.5 Measured value transmission
All recorded measured values, operating messages and alarms are made available via the
BMS bus.
3.4 History memory
All warnings, alarms and device errors are stored in the internal history memory with date
and time stamp. The time the event started, the time of acknowledgement and the end
of the event are recorded. The history memory can be called up and reset via the device
menu (
see "History" on page 37 ).
3.5 Self test
3.5.1 Self test after connection to the supply voltage
Once connected to the supply voltage, all internal measurement functions, the compo-
nents of the process control such as data and parameter memory as well as the connec-
tions to earth are checked. The self test is completed after approx. 60 s. Afterwards, the
normal measurement mode begins.
If a device error or a connection fault is detected, the corresponding alarm will be indicat-
ed in the display as well as via the alarm relay K3 (31-32-34). This relay continuously oper-
ates in N/C operation, i.e. it de-energises even in case of a complete device failure.
During this self test, when the device is being started, the alarm relays are not switched.
The test has been run and the result was positive.
The test has been run and the result was negative.
The test is running.
TEST
√ Measurement
√ System
Coupling
Calibration
55 %
√