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TROUBLESHOOTING AND REPAIR |
POWER WAVE 455 / PF-10 METER ACCURACY CHECK
WARNING
Service and repair should only be performed by Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in dan- ger to the technician or machine operator and will invalidate your factory warran- ty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to per- form the test/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed. Call
DESCRIPTION
This procedure will aid the technician in checking and calibrating meter displays.
This procedure takes approximately 30 minutes to perform.
MATERIAL NEEDED
DC ammeter and meter grade shunt, +/- 1% accuracy
DC voltmeter, +/- 1% accuracy
Resistive load bank
DSP, STT or other
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METER ACCURACY CHECK
1.With power off, locate DIP switch bank S2 on the
2.Set switch 8 to the up position.
3.Connect a resistive load between the out- put block of the
4.Turn machine on.
5.Using the Set Control on the
6.Adjust the resistive load and the left knob of the
7.After the load condition is set, accuracy is measured by comparing the meter of the
8.At conclusion of test, turn the power off and set the DIP switch to its original posi- tion.
PROCEDURE TO REPAIR IF METERS ARE OUT OF RANGE
If the measured voltage is not within the acceptable range, the Control PC board must be replaced. The Control PC board can not be calibrated.
If the measured current is not within the acceptable current range, adjust trimmer R126 on the Control PC board. R126 is located on the upper left corner of the Control PC board. If the display is still in error, either the Control PC board or LEM (Current Transducer) may be faulty.
