User Manual

40 GMC-I Messtechnik GmbH
Measurements: V/Hz, , , Temp (°C/°F), , M
@UISO
, A/Hz
Caution: High-Voltage!
Do not touch the conductive ends of the test probes when the
instrument has been activated for the measurement of insulation
resistance.
You may otherwise be exposed to a current of 2.5 mA
(limited in the measuring instrument), and although this is
not life endangering, the resulting electrical shock is quite
discernible.
If, on the other hand, measurement is being performed on a
capacitive device under test, for example a cable, it may be
charged with up to approximately 1200 V.
Touching the device under test after measurement has been
performed is life endangering in this case!
Selecting the Test Voltage (U
ISO
= 50 to 1000 V)
The desired test voltage can be selected in the “SET” menu (see
also section 6.4):
1nFo  ...  SET rAtE  ...  v1so
... 500, 1000 V* 
* Selectable test voltages and the default value depend upon the
respective device variant.
The selected test voltage appears at the display during testing.
5.7.2 Performing the Insulation Measurement
➭ Starting the insulation resistance measurement:
Press and hold the U
ISO ON / OFF key until the display settles in,
in order to measure insulation resistance.
Insulation resistance measurement is ended by releasing the
key.
Auto-ranging is active during insulation resistance measurement.
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
FUNC
ENTER
002 . 00
M 
M
ISO
FUNC
ENTER
UISO ON / OFF
000 . 0
V
Activate
Test V oltage
DC
AC
TRMS
500 V
ISO 500 V
M
@UISO
V
1M