Manual

80 Gossen Metrawatt GmbH
18 Measurement with Accessory Sensors
18.1 Current Measurement with Current Clamp Sensor
Bias, leakage and circulating current up to 1 A, as well as leakage
current up to 1000 A can be measured with the help of special
current clamp sensors, which are connected to sockets 15 and
16.
Attention!
!
Danger: High-Voltage!
Use only current clamp sensors which are specifically of-
fered as accessories by Gossen Metrawatt GmbH.
Other current clamp sensors might not be terminated
with an output load at the secondary side. Dangerously
high voltage may endanger the user and the device in
such cases.
Attention!
!
Maximum input voltage at the test instrument!
Do not measure any currents which are greater than
specified for the measuring range of the respective
clamp. Input voltage for clamp connector sockets 15
and 16 at the test instrument may not exceed 1 V!
Attention!
!
Be sure to read and adhere to the operating instructions
for current clamp sensors and the safety precautions in-
cluded therein, especially those regarding the approved
measuring category.
Select Measuring Function
Select Measuring Range at the Current Clamp Sensor
Set Parameters
The transformation ratio parameter must be correspondingly set
at the test instrument depending upon the respectively selected
measuring range at the current clamp sensor.
Specifying limit values results in automatic evaluation at the end of
the measurement.
Connection
Start Measurement
Press the OK key to stop
the measurement.
Test
Instrument
Clamp Meters Test
Instrument
Transforma-
tion Ratio
Parameter
WZ12C
Switch
Z3512A
Switch
WZ12C
Measuring
Range
Z3512A
Measuring
Range
Measuring
Range
1:1
1 V / A
1 mV / mA
x 1000
[mV/A]
1 mA …
15 A
0 … 1 A
5 …
999 mA
01:10
100 mV / A
— x 100 [mV/A] — 0 … 10 A
0.05 …
10 A
1:100
10 mV / A
— x 10 [mV/A] — 0 … 100 A
0.5 …
100 A
1:1000
1 mV / A
1 mV / A x 1 [mV/A]
1 A …
150 A
0 … 1000 A
5 …
150A/999A
Test Instrument Clamp Test
Instrument
Transformation Ratio
Parameter
METRAFLEX P300
Switch
METRAFLEX P300
Measuring Range
Measuring
Range
1:1
1 V / A
3 A (1 V/A) 3A 5 … 999 mA
01:10
100 mV / A
30 A (100 mV/A) 30 A 0.05 … 10 A
1:100
10 mV / A
300 A (10 mV/A) 300 A 0.5 … 100 A
SENSOR
Clamp
output range
Limit Value:
I < and I > Limit Value
U
L
 R
L