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CALIBRATION
SEMIAUTOMATIC PW450 CURRENT CALIBRATION
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid elec- trical 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 perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical trou- bleshooting assistance before you proceed. Call
PROCEDURE DESCRIPTION
This procedure is necessary if the control and/or the shunt amplifier boards are replaced. The current control is the most critical function in the Power Wave machine.
MATERIALS NEEDED
Test and Calibration Overlay
A 300 amp, 30 volt resistance grid load
A small trimmer screwdriver
A calibrated DC ammeter accurate to read 300.0 amps +/- 1.0 amps.
A machine output triggering device such as the
SETUP PROCEDURE
1. Remove and install the replacement board in question.
Figure 8 – PC BOARD REMOVED BUT STILL CONNECTED
Lay Control Board on top of machine. Make sure it is snapped into the ground plane assembly and insulated from the case and other components.
Leads
POWER WAVE CALIBRATION