Electrical Tests; Insulation Resistance; Open Circuit Voltage - Fronius AccuPocket 150 Service Manual

Electrical tests

Insulation resist-
ance
1
2
9
IMPORTANT!
If no conductive connection exists between the welding current sockets during
the measurement, then the measurement must be performed on every current
socket.
Open circuit
-
voltage
-
-
-
Performing the measurement
-
-
-
-
-
Measuring device
Test piece
Instrument leads
Peak value measurement of open circuit voltage at the power source current
sockets
The measurement must be performed using the "Measuring circuit for U0
measurement"
The measurement must be performed in "Electrode" mode
The open circuit voltage may not exceed the value specified on the rating
plate for a power source supply at rated welding voltage
Connect the measuring circuit and the multimeter to the power source
Set the multimeter to DC voltage measurement and the measuring circuit to
UPeak
Briefly press the Reset button to discharge the capacitors
Adjust the potentiometer until the largest voltage value is shown
Enter the measured voltage value in the test record
- Test voltage for insulation meas-
urement 500 V DC
- Insulation resistance must be at
least 2.5 MΩ
- Must be measured from the cur-
rent sockets to the tab on the cas-
ing (behind the control panel)
- The lowest measured value must
be entered in the test record
43