Lincoln Electric INVERTEC V450-PRO - Manual (Page 28)

D-3 MAINTENANCE D-3
INVERTEC V450-PRO (CE)
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.
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 button 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 specifica-
tion then proceed to the Voltage Calibration
Procedure.
10. If the ammeter does not meet the specifica-
tion then proceed to the Current Calibration
Procedure.
NOTE: Before attempting to calibrate the voltage
or current setting of the V450-PRO, be sure to
read the entire voltage or current calibration sec-
tion. If the steps are not completed quickly, the
machine will automatically leave the calibration
mode without changing the calibration settings.
The voltage and current calibration settings of the
V450-PRO are completely independent of each
other. Adjusting one will not affect the other.
VOLTAGE CALIBRATION
1. Connect the resistive load band (approximate-
ly .087 ohms) and test voltmeter to the weld-
ing output terminals.
2. Press and hold in the Mode Select/Memory
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 button.
6. Adjust the output control knob until the actual
output voltage reading on the test volt meter
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/Memory
button to save the 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 previ-
ous calibration settings.