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Gossen Metrawatt METRAHIT ULTRA Manual

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30 GMC-I Messtechnik GmbH
V/Hz, Ω, Temperature, and A/Hz Measurements
Frequency Measurement in the V (DC+AC) Switch Position
Ð Connect the measured quantity in the same way as for voltage
measurement.
Ð Manually select the measuring range for the voltage amplitude.
Ð Repeatedly press the multifunction key FUNC | ENTER until the
unit of measure Hz appears at the display.
Lowest measurable frequencies and maximum allowable volt-
ages are listed in section 8, “Technical Data”,.
Measurement with Low-Pass Filter
Attention!
!
Be aware of the fact that dangerous voltage spikes are not
displayed during this type of measurement (see also “Volt-
age Comparator”). We recommend measuring voltage with-
out the low-pass filter first, in order to be able to detect any
dangerous voltages.
A 1 kHz low-pass filter can be activate if required, in order to filter
out high frequency pulses of greater than 1 kHz, for example
when performing measurements at pulsed motor drives, i.e. un-
desired voltages of greater than 1 kHz can be suppressed.
The active low-pass filter is indicated by the FILTER display. The
multimeter is automatically switched to manual measuring range
selection.
Specified measuring accuracy is not reached with signals of
greater than 100 Hz when the filter is active.
V~ & Filter
!
CL ip
=
0FF
!
V
1kHz
dB
Reference value
Current measured value
V
229
.
20
V
229
.
20
V
Hz
50
.
0000
Hz
FUNC
ENTER
FUNC
ENTER
229
.
00
V
10
.
00
dB
dB
FUNC
ENTER
FUNC
ENTER
DC
AC
TRMS
DC
AC
TRMS
229
.
00
V
050
.
000
Hz
FILTER
MAN
DC
AC
TRMS
1kHz
V~
R
:
00.775
V
050
.
000
Hz
V
Hz
Hz
V
… 30 …


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