User Manual

GMC-I Messtechnik GmbH 55
Measurement with Current Clamp Sensor
EXTRA
A current clamp measurement is possible in this case, indepen-
dent of measuring functions R
PE
, I
PE
or I
G
, e. g. for measuring
current at permanently installed devices.
Schematic Diagram
Wiring Diagram
Set Measuring Parameters for Current Clamp Sensor
Measuring 
Parameter
Meaning
Measurement type
Suitable for connecting 
DUTs per
V – COM Display: A AC Permanent connection
V – COM 
(with mains)
Display: A AC; with mains at test
socket, e.g. for measuring SELV at
power supply units
Test socket
Polarity – only with PE-P1 (with mains)
L/N or N/L Polarity selection for mains voltage at test socket
Clamp factor
At the test 
instrument
Transmission factor 
current clamp sensor
Suitable clamps
1 V : 1000 A
(1 : 1000)
1 mV / 1 A WZ12C, Z3512A, 
METRAFLEX 3000
1 V : 100 A
(1 : 100)
10 mV / 1 A WZ11B, Z3512A, 
METRAFLEX 3000/300M
1 V : 10 A
(1 : 10)
100 mV / 1 A WZ12B, WZ11B, Z3512A, 
METRAFLEX 3000/300M
1 mV : 1 mA
(1 : 1)
1000 mV / 1 A WZ12C, Z3512A, 
METRAFLEX 300M
10 mV : 1 mA
(10 : 1)
100 mV : 1 mA
(100 : 1)
100 mV : 1 mA SECUTEST CLIP
1 V : 1 mA
(1000 : 1)
Test Sequence with Current Clamp Sensor
➭ Set the rotary switch to position EXTRA.
➭ Se
lect measuring function IZ.
➭ Se
t the clamp factor at the current clamp sensor.
➭ Clam
p Factor: Set the clamp factor at the test instrument and at
the current clamp sensor.
➭ Connec
t the plug of the current clamp with the V-COM jacks
of the test instrument.
➭ Enc
lose the cable of the consumer with the current clamp
sensor as shown in the diagrams.
➭ S
tart test: Press the START/STOP key. 

➭
The measured values are displayed. The measured
value recording symbol shown at the right appears.
Each time th
is key is pressed, the currently displayed
measured value is saved to the buffer.
➭ Te
rminate test: Press the START/STOP key. 
The memory symbol appears (disk with number of buff-
ered measured values) and prompts you to save the
measur
ed values under an ID number.
➭ In or
der to discard the buffered measured values,
press the ESC key and confirm with the key shown at
the right.
Set Measuring Range at Clamp and Parameters in the Test 
Instrument
SECUTEST PRO
SECULIFE ST
BASE(25)
Current Clamp Sensor SECUTEST PRO
SECULIFE ST
BASE(25)
Clamp Factor
Transformer Ratio
(switch*)
Measuring
Range
Display Range
with Clamp
WZ12C
1000 mV : 1 A 1000 mV : 1 A 1 mA... 15 A 0 A ... 300 A
1 mV : 1 A 1 mV : 1 A 1 A ... 150 A 1,0 A ... 300 A
WZ12B
100 mV : 1 A 100 mV : 1 A 10 mA... 100 A 0 A ... 300 A
WZ11B
100 mV : 1 A 100 mV : 1 A 0,5 A ... 20 A 0 A ... 300 A
10 mV : 1 A 10 mV : 1 A 5 A... 200 A 0 A ... 300 A
Z3512A
1000 mV : 1 A 1000 mV : 1 A 0,001 A... 1 A 0 A ... 300 A
100 mV : 1 A 100 mV : 1 A 0,01 A... 10 A 0 A ... 300 A
10 mV : 1 A 10 mV : 1 A 0,1 A ... 100 A 0 A ... 300 A
1 mV : 1 A 1 mV : 1 A 1 A... 1000 A 0 A ... 300 A
METRAFLEX 3000
100 mV : 1 A 100 mV : 1 A 0,01 A... 30 A 0 A ... 300 A
10 mV : 1 A 10 mV : 1 A 0,1 A ... 300 A 0 A ... 300 A
1 mV : 1 A 1 mV : 1 A 1 A... 3000 A 0 A ... 300 A
METRAFLEX 300M
1000 mV : 1 A 1000 mV : 1 A 0,001 A... 3 A 0 A ... 300 A
100 mV : 1 A 100 mV : 1 A 0,01 A... 30 A 0 A ... 300 A
10 mV : 1 A 10 mV : 1 A 0,1 A ... 300 A 0 A ... 300 A
100 mV : 1 mA SECUTEST CLIP
100 mV : 1 mA 0,1...25 mA 0,01 mA ... 3,00 A