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Gossen Metrawatt METRA HIT 27I Manual

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10 GMC-I Messtechnik GmbH
7 Voltage and Frequency Measurement
7.1 Voltage Measurement [V]
Ð Select voltage type V or V~/Hz with the rotary selector
switch as appropriate for the measured quantity.
Ð Connect the measurement cables as shown.
The “⊥” connector jack should be grounded.
Ð 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 (Ω, mΩ,
MΩ) 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
Ð Select the 3 V measuring range.
Ð Plug the measuring cables into the instrument and
connect the free ends to each other.
Ð 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.
Ð 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 μs. 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 μs. It has a continuous load capacity of 1200 V
RMS
.
Additional influence error caused by the KS30 measuring
adapter amounts to approximately –2%.
7.1.3 Voltage Measurements at Above 600 V
Voltages of greater than 600 V can be measured with a high-
voltage probe, e.g. the HV3
1)
or the HV30
2)
from GMC-I
Messtechnik GmbH. It is absolutely essential to ground the
bonding terminal. Observe all applicable safety precautions!
1)
HV3: 3 kV
2)
HV30: 30 kV, for direct voltage only
FUNC FUNC
V
Hz
V~
Hz
226
.
000
050
.
00
m
Ω
S+S–
VΩ°C
Voltage Measurements at Above 600 V
with the HV3 High-Voltage Probe
black
black
red
x1000
x100
… 10 …


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Gossen Metrawatt METRA HIT 27I Quick start guide - English, German - 4 pages

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Gossen Metrawatt METRA HIT 27I Quick start guide - French - 4 pages


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