User Manual

56 GMC-I Messtechnik GmbH
Measurements: V/Hz/dB – PQ/ – MHz/% – Ω/nS/R
SL
– / – Temp – /m – W/Wh – A/Hz/thd
5.8.2 Current Measurement with Current Clamp Sensor
Voltage/Current Transformer Output
When a current clamp sensor is connected to the system multime-
ter (V input), all current displays appear with the correct value in
accordance with the selected transformation ratio. The only prere-
quisite is that the current sensor is equipped with at least one of
the below listed transformation ratios, and that the ratio has been
previously selected in the following menu (
Cl ip ≠ 0FF ) (see also
section 6.4).
Current Clamp Setup Menu
1nFo  ...  SET system  ...  CLIP
CLIP set: 1:1 / 10/100/1000 / 0ff 
The maximum allowable operating voltage is equal to the nominal
voltage of the current transformer. When reading the measured
value, additional error resulting from the current clamp sensor
must also be taken into consideration (default setting:
Cl ip = 0FF).
Harmonic Analysis with Current Clamp Sensor
Parameters for harmonic analysis:
See section 6.4.6 on page 71.
Trans. Ratio
CL IP
DMM Measuring Range Clamp Types
600 mV 6 V 60 V
1:1
1 m V / 1 mA
600.00 mA 6.0000 A 60.000 A WZ12C
1:10
1 mV / 10 mA
6.0000 A 60.000 A 600.00 A WZ12B, Z201A
1:100
1 mV / 100 mA
60.000 A 600.00 A 6000.0 A Z202A
1:1000
1 mV / 1 A
600.00 A 6000.0 A 60000 A
Z202A, Z203A,
WZ12C
MEASURE
SETUP
FUNC
ENTER
FUNC
ENTER
FUNC
ENTER
V~
1kHz
dB
V
V
[PQ]
~
R
x
Current
COM
V
Tem p
Ω
R
i
R
i
≥ 9 MΩ
R
i
≥ 17 MΩ (DC)
> 600 V:
> 30 V AC / > 35 V DC:
Max. 600 V (< 10 kHz)
!
max. 100 V (> 10 kHz)
P
max
= 6 x 10
6
V x Hz