User manual

10 GMC-I Messtechnik GmbH
7 Voltage and Frequency Measurement
7.1 Voltage Measurement [V]
➭ Select voltage type V or V~/Hz with the rotary selector
switch as appropriate for the measured quantity.
➭ Connect the measurement cables as shown.
The “” connector jack should be grounded.
➭ The V~/Hz selector switch position: Each time the FUNC key is
pressed, voltage and frequency measurement are
alternately selected, and switching is acknowledged with
an acoustic signal. The respective measured quantity is
displayed at the LCD.
Note!
An intermittent acoustic signal warns the operator if
the measured value exceeds the upper range limit in
the 600 V range.
Attention!
!
Make sure that a current measuring function (, m,
M) or a C measuring function () has not been
selected when the multimeter is connected for
voltage measurement!
If fuse blowing limits are exceeded as a result of
operator error, both the operator and the instrument
are in danger!
7.1.1 Zero Balancing in the 3 V DC Measuring Range
➭ Select the 3 V measuring range.
➭ Plug the measuring cables into the instrument and
connect the free ends to each other.
➭ Press the FUNC key.
The instrument acknowledges zero balancing with an
acoustic signal, and „0.0000 V“ and the “ZERO” symbol appear
at the display. The voltage value measured at the moment the
key is pressed serves as a reference value (2000 digits). It is
automatically subtracted from all subsequent measured
values. If the measuring range is changed (MAN key), the
ZERO function only remains active (at the display and in
memory) for the selected measuring range.
➭ Zero balancing can be deleted:
– By once again pressing and holding the FUNC key, which
is acknowledged with two acoustic signals
(ZERO is deleted in the display)
– By switching the instrument off
7.2 Frequency Measurement [Hz]
➭ Select the V~/Hz measuring function with the rotary
selector switch.
➭ Apply the measured quantity as described under voltage
measurement.
➭ Briefly press the FUNC key in order to measure frequency.
The frequency values appears at the main display. The
frequency measuring range can be selected
subsequently by pressing MAN|AUTO. The previously
selected voltage measuring range remains active.
➭ The instrument can be switched from frequency
measurement back to alternating voltage measurement
by pressing the FUNC key once again. This selection is
acknowledged with an acoustic signal.
Note!
Frequency measurement is only possible if the
measuring signal passes through zero (AC coupling).
FUNC FUNC
V
Hz
V~
Hz
226 . 000
050
. 00
m
S+S–
VC
– (+)
~
+ (–)
~
max. 600 V (3 kHz)
V: 0.1 mV  600 V
Hz: 1Hz  3kHz
Measuring Ranges: