User Manual

GMC-I Messtechnik GmbH 7
7 Voltage Measurement
➭ Depending upon the voltage to be measured, set the
rotary selector switch to V
or V .
➭ Connect the measurement cables as shown. The “”
connector jack should be grounded.
Note!

The 600 mV measuring range can only be selected
manually with the MAN / AUTO key.
If the measured value exceeds 60 V DC or 40 V AC
the symbol appears at the display.
An intermittent acoustic signal warns the operator if
the measured value exceeds the upper range limit
value of 600 V in the 600 V range.
Attention!
!
Make sure than none of the current measuring ranges
(neither “mA” nor “A”) are activated when connecting
the multimeter for the performance of voltage
measurements! If fuse trip limits are exceeded as a
result of operator error, both the operator and the
instrument are in danger!
Zero Balancing  REL in the V AC und V DC Measuring Range
You can select the reference point in the V AC and V DC
measuring range:
➭ Plug the measuring cables into the instrument and
connect the free ends to each other.
➭ After selecting the measuring range, briefly press the two
HOLD and MAN / AUTO keys.
The instrument acknowledges zero balancing with an
acoustic signal and „0“ ( 1digit) and  REL appears at the
LCD, depending on the measuring range. The voltage
displayed at the moment the key is pressed is automatically
substracted from all subsequent measured values.
Zero balancing can be deleted:
– by briefly pressing the MAN / AUTO key, which is
acknowledged with an acoustic signal,
– by switching the instrument off.
7.1 Transient Overvoltages
The multimeter is protected against transient overvoltages of
up to 6 kV with rise times of 1.2, and halftimes of 50 s. For
measurements at transformers or motors with long pulse
durations etc., we recommend the use of our KS30
measuring adapter. It provides protection against transient
overvoltages of up to 6 kV with rise times of 10, and halftimes
of 1000 s. It has a continuous load capacity of 1200 V
RMS
.
Additional influence error caused by the KS30 measuring
adapter amounts to approximately –2%.
MAN
AUTO
brief
V=
– (+)
+ (–)
max. 600 V
V=: 600 mV  600 V
Measuring Ranges:
!
6V 60 V
60 V  600 V
600 V  600 mV
600 mV  6V
>60V:
> 600 V:
20.00
V
DC
acoustic signal
MAN
AUTO
brief
V~
Max. 600 V (1 kHz)
V~: 600 mV  600 V
(45 Hz  1kHz)
Measuring Ranges:
~
!
> 600 V:
6V 60 V
60 V  600 V
600 V  600 mV*
600 mV*  6V
* manual only
20.00
V
AC
~
>40V:
acoustic signal