isoHR685W-x-I-B_D00261_05_M_XXEN/12.2021
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Display
8. Display
8.1 Standard display
During normal operation, the ISOMETER® displays the message "OK" and below, the cur-
rently measured insulation resistance.
In the bottom line of the display, the set response values for "R(an)" are indicated. In the
example below,
R
an1
=100 k
Ω
und
R
an2
=20 k
Ω
.
The signal quality of the measurement suits the selected profile.
The better the signal quality, the faster and more exact the device can
measure.
The signal quality of the measurement does not suit the selected
profile.
Select a different measurement profile.
Update period between the measuring pulses.
IT system
2 GΩ
OK
R(an)
40kΩ/10kΩ
8.2 Fault display (active)
An active fault is displayed by
.
The upper part of the display turns orange and displays the fault message.
Depending on the type of fault, the LEDs "ALARM 1", "ALARM 2" or "SERVICE" are activat-
ed.
In the following example, a resistance has been detected. Since the values
R
an1
=100 k
Ω
and
R
an2
=20 k
Ω
are both below the set response value, „ALARM 1“ and „ALARM 2“ have
been triggered.
If several fault messages have appeared, you can navigate through the faults using the
and
buttons.
If the value falls below
R
an1
in a DC system or a DC offset is detected in an AC system, ad-
ditional detailed information regarding the DC offset will be displayed.
1/4
7 kΩ
7 kΩ
Insulation fault
