Gossen MetraWatt METRAHIT T-COM PLUS, Operating Instructions Manual

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28 GMC-I Messtechnik GmbH
Measurements: V/Hz –

– – Temp – – m – A/Hz
5.1.2 Alternating Voltage and Frequency Measurement V AC and Hz
with Selectable Low-Pass Filter
➭
Set the
CL iP
parameter to
0FF
in the current clip setup menu.
Otherwise all measured values are displayed in amperes, and
are corrected by the amount resulting from the selected trans-
formation ratio for an interconnected clip-on current sensor.
1nFo 
...
 SET

rAtE 
...
 CL IP
1
/
10
/
100
/
1000
/
0ff 
➭
In accordance with the voltage or frequency to be measured,
turn the rotary switch to V~ or Hz.
➭
Connect the measurement cables as shown.
The “

” connector jack should be grounded.
Voltage Measurement
Note
An intermittent acoustic signal warns the operator if the
measured value exceeds the upper range limit in the 600 V
range.
Make sure that a current measuring range (“A”) has not been
activated, when the multimeter is connected for voltage
measurement! If the fuse’s blowing limits are exceeded as a result
of operator error, both the operator and the instrument are in
danger!
➭
You can switch back and forth between voltage measurement
with and without low-pass filter.
➭
Repeatedly press the FUNC | ENTER multifunction key, until the V
or V/Fil unit of measure appears at the display.
Frequency Measurement
➭
Apply the measured quantity is the same way as for voltage
measurement.
➭
Manually select the measuring range for the voltage amplitude.
When the instrument is switched to frequency measurement,
the previously selected voltage measuring range remains ac-
tive.
➭
You can switch back and forth between frequency
measurement with and without low-pass filter.
Repeatedly press the
FUNC | ENTER multifunction key, until the
Hz or Hz/Fil unit of measure appears at the display.
Lowest measurable frequencies and maximum allowable
voltages are included in chapter 9, “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
“Voltage Comparator”.
We recommend measuring voltage without the low-pass
filter first, in order to be able to detect any dangerous
voltages.
A 200 Hz low-pass filter can be activated if required, in order to
filter out capacitively induced high frequency pulses of greater
than 200 Hz, for example when performing measurements at
cables, i.e. undesired voltages of greater than 200 Hz can be
suppressed.
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
FUNC
ENTER