Gossen MetraWatt SECUTEST ST BASE - Page 75

Gossen Metrawatt GmbH 75
Measurement with Current Clamp Sensor
Current clamp measurement is possible in this case independent
of measuring functions R
PE
, I
PE
and I
E
, e.g. for measuring current
at permanently installed DUTs.
Schematic Diagram
Wiring Diagram
Setting Measuring Parameters for a
Current Clamp Sensor
Test Procedure with
Current Clamp Sensor
➭ Set the rotary switch to the EXTRA position.
➭ Select the Current (via clamp) measuring function.
➭ Set the clamp factor at the current clamp sensor.
➭ Clamp factor: Set clamp factor at the test instrument to the
same value as at the current clamp sensor.
➭ Connect the current clamp to the V-COM sockets at the test
instrument.
➭ Enclose the consuming device’s cable with the current clamp
sensor as shown in the schematic diagrams.
➭ Start the test: Press the START/STOP key.
➭ The measured values are displayed. The measured
value recording icon shown at the right appears. Each
time this key is pressed, the currently displayed mea-
sured value is saved to buffer memory.
➭ End the test: Press the START/STOP key.
The save icon appears (floppy disk showing the num-
ber of measured values stored to buffer memory) and
prompts you to save the measured values to a test ob-
ject ID number.
➭ Press the ESC key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Setting Measuring Range at the Clamp and Parameters at the Test
Instrument
Measuring
Parameter
Meaning
Meas. Type
Suitable for
DUT Connection via
V – COM Display: A AC Permanent connection
V – COM
(with mains)
Display: A AC: with mains to test
socket, e.g. for measuring protec-
tive extra-low voltage at power
packs
Test socket
Polarity – only for V-COM (with mains)
Normal Selection of polarity for mains voltage to the test socket
Reversed
Clamp Factor
At tester Clamp transformation ratio 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)
EXTRA
100 mV : 1 mA
(100 : 1)
100 mV : 1 mA SECUTEST CLIP
1 V : 1 mA
(1000 : 1)
Test Instrument Current Clamp Sensor Test instrument
Clamp factor
Transformation
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 ... 1A 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 ... 3A 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
Measuring
Parameter
Meaning