Open Circuit Voltage - Fronius TransPocket 150 Service Manual & Spare Parts List

Metrics
Primary  Secondary
Primary  Earth
Secondary  Earth
Open circuit volt- -
age -
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Open circuit voltage testing procedure:
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NOTE! If no conductive connection exists between the current sockets and the
mains plug contacts during the measurement, then the measurement must be
performed on every current socket/line.
Peak value measurement of open circuit voltage at the power source current sockets
The measurement must be performed using the "Measuring circuit for U
ment" (43,0001,0945)
The measurement must be performed in Electrode mode
The open circuit voltage must not exceed the value specified on the rating plate when
supplying the power source with rated welding voltage - tolerance +/- 10%
Connect the testing circuit and the multimeter to the power source
Set the multimeter to DC voltage measurement and the measuring circuit to U
Briefly press the Reset button to discharge the capacitors
Switch on the device
Adjust the potentiometer until the largest voltage value is shown
- Test voltage for all measurements -
500 V DC
- The insulation resistance must not be
below the limit values shown in the ta-
ble below
- The lowest measured value must be
entered in the test record
Key:
1 Measuring device
2 Test piece
9 Measuring line
Measuring point
Mains plug L/N  Current sockets
Mains plug L/N  Earth
Current socket  Earth
Measured
value
 5 M
 2.5 M
 2.5 M
measure-
0
PEAK
107