Open Circuit Voltage - Fronius TransTig 170 Service Manual

NOTE!
If the current sockets and the contacts on the mains plug do not have a conductive
connection during the measurement, the measurement must be carried out with
each individual current socket / line.
Measurement
Primary  Secondary
Primary  Ground
Secondary  Ground
Open circuit volt- -
age
-
-
-
Open circuit voltage test sequence:
-
-
-
-
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Peak value measurement of the open circuit voltage at the current sockets of the pow-
er source
The measurement must be carried out with the "measuring circuit for U
ment" (43,0001,0945)
Measurement must be performed using the 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 test circuit and multimeter to power source
Set multimeter to voltage measurement DC and measuring circuit to U
Briefly press the Reset button to discharge the capacitors
Turn the device on
Adjust the potentiometer until the maximum voltage value is displayed
- Test voltage for all measurements 500
V DC
- The insulation resistance must not be
less than the values specified in the ta-
ble below
- The lowest measured value must be
entered in the log
Key:
1 Measuring instrument
2 Test object
9 Measuring line
Measurement point
Mains plug L / N current sockets
Mains plug L / N  ground
Current sockets  Ground
Measured
value
 5 M
 2.5 M
 2.5 M
measure-
0
PEAK
39