10
DranTech PMIT User’s Guide
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!
!
M
ake sure that a current measuring function (
Ω
, m
Ω
,
M
Ω
) 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
7.1.2 Transient Overvoltages
The multimeter is protected against transient overvoltages of up
to 4 kV with rise times of 1.2, and halftimes of 50
μ
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
μ
s. It has a
continuous load capacity of 1200 V
RMS
. Additional influence
error caused by the KS30 measuring adapter amounts to
approximately –2%.
FUNC
FUNC
V
Hz
V~
Hz
226.000
050.00
m
Ω
S+
S–
V
Ω°
C
– (+)
~
+ (–)
~
max. 600 V (3 kHz)
V: 0.1 mV
…
600 V
Hz: 1 Hz
…
3 kHz
Measuring Ranges:
