Troubleshooting Welding Power Source Issues; Power Source Calibration Procedure - Miller FieldPro Remote CE Owner's Manual

Table of Contents

7-6. Troubleshooting Welding Power Source Issues

If the welding power source is NOT responding after everything is connected, follow the items listed below before contacting the nearest

factory-authorized service agent:

Welding power source is plugged in and there is no power after turning on unit.

If unit is directly connected to a line disconnect box or plugged into a receptacle from a line disconnect box, be sure that the line disconnect switch

or main breaker is in the ON position.

Weld is not consistent from one welding application to another.

Be sure that work clamp is connected to a clean, paint-free area of pipe; otherwise, grind an area if necessary to make a good work connection.

Keep work clamp as close as possible to joint being welded.

Follow recommended settings in Operation section of manual to select a starting point for welding.

Recommended joint preparation and fit-up is 1/32-1/16 in (0.8-1.6 mm) land and a 1/8 in (3.2 mm) root opening.

Porosity in weld bead (TIG welding).

Check shielding gas supply that there is enough gas and supply is turned on.

Check shielding gas flow rate at regulator.

Check that gas pressure does not exceed 90 psi (621 kPa).

Check all shielding gas fitting and tighten if necessary.

Shield joint from wind.

FieldPro Remote does not turn on.

Check work sense lead connection. Be sure that the clamp is connected to a clean, paint-free area of the workpiece.

7-7. Power Source Calibration Procedure

At any point during voltage or amperage calibration, the IN USE button may be used to advance without saving the calibration. This may be useful

when only wishing to verify calibration and not change the settings. Press the ELECTRODE button at any point to exit calibration mode. Routine

calibration is not necessary for most applications, calibration is verified at the factory.

Required Equipment:

Calibrated voltage meter and ammeter

Load bank or shorting cable

Setup And Enter Calibration Mode:

1. Disconnect output cables including all accessories.

2. Turn power on.

3. To enter calibration mode, press and hold the STICK and IN USE buttons at the same time for 2 seconds. Display will show — — —

4. Release buttons. Display will show CAL. Output will be de-energized. Voltage and current meters should measure zero.

For Voltage Calibration, connect voltage meter across the output studs. + to ELECTRODE and − to WORK (open circuit load).

For Amperage Calibration, connect shorting cable or load bank at heavy load setting to output studs. Connect ammeter to measure output current.

If at any point the display reading is out of the allowed range, unit may need to have the calibration values defaulted. See below for default proced-

ure. If defaulting the calibration does not resolve the issue, the unit may require servicing.

If at any point the measured voltage or amperage readings are out of the allowed range or are not the correct polarity (+ or −), the unit may require

servicing.

Voltage Calibration Procedure:

1. When in calibration mode, open/disconnect load from output studs, then press the TIG button.

2. Verify the display shows 27.0 (±2.0).

3. Verify the voltmeter displays -27.0 (±2.0). Verify value is negative.

4. Using the − and + buttons, adjust the display to match the measured value.

5. Wait a few seconds, then verify display and voltmeter reading are the same.

6. Press the TIG button to save the calibration setting.

7. Verify the display shows 72.0 (±5.0), indicating open circuit voltage.

8. Verify the voltmeter displays -72.0 (±5.0). Verify value is negative.