Troubleshooting and repair – Lincoln Electric INVERTEC SVM199-A User Manual
Page 56
VOLTAGE AND CURRENT CALIBRATION PROCEDURE (continued)
CALIBRATION CHECK
The calibration of the V450-PRO can be checked
using a resistive load bank with the V450-PRO in
mode 200. Mode 200 is a constant current test
mode.
NOTE: Before attempting to calibrate the voltage
or current setting of the V450-PRO, be
sure to read the entire voltage or current
calibration section. If the steps are not
completed quickly, the machine will auto-
matically leave the calibration mode with-
out changing the calibration settings. The
voltage and current calibration settings of
the V450-PRO are completely indepen-
dent of each other. Adjusting one will not
affect the other.
1. Press and hold in the Mode SELECT button.
2. Turn on the V450-PRO.
3. Rotate the Output Knob, while still holding the
mode select button in, until the displays read
“mode 200”.
NOTE: Machines with an Advanced Process
Panels do not have a mode select button.
Use the same procedure except hold in
the Memory button on the advanced
process panel instead of the mode select
button.
4. Release the Mode SELECT/MEMORY but-
ton and the machine will be in mode 200.
5. With the machine in mode 200 apply a resis-
tive load to the welding output terminals
(approximately .087 ohms) set the machine
output to 300 amps and enable the Weld
Terminals. (Weld Terminals Select ON).
6. Using the test meters note the output voltage
and current.
7. The V450-PRO voltmeter must match the test
meter reading to within +/- 1 volt.
8. The V450-PRO ammeter must match the test
meter within +/- 5 amps.
9. If the voltmeter does not meet the specification
then proceed to the Voltage Calibration
Procedure.
10. If the ammeter does not meet the specification
then proceed to the Current Calibration
Procedure.
VOLTAGE CALIBRATION
NOTE: If the Mode SELECT/MEMORY button is
not pressed within 30 seconds after
adjusting the Output Control knob the
machine will leave the calibration mode
and use the previous calibration settings.
1. Connect the resistive load band (approximate-
ly .087 ohms) and test voltmeter to the welding
output terminals.
2. Press and hold in the Mode SELECT/MEMO-
RY button.
3. Turn on the V450-PRO.
4. Rotate the Output Control knob until the dis-
play reads “vol cAL”.
5. Release the Mode SELECT/MEMORY but-
ton.
6. Adjust the Output Control knob until the actu-
al output voltage reading on the test voltmeter
is 20volts +/- .5 volts.
7. Wait for the machine’s output to be automati-
cally turned off and then back on.
8. Adjust the Output Control knob again if nec-
essary to make the actual voltage output 20
volts +/- .5 volts.
9. Wait for the machine’s output to be automati-
cally turned off and then back on.
10. Repeat the above two steps if necessary.
11. Press and release the Mode SELECT/MEM-
ORY button to save the calibration.
TROUBLESHOOTING AND REPAIR
F-16
F-16
INVERTEC® V450-PRO