Arc Machines 205 WDR - Manual (Page 49)

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O P E R A T O R ’ S M A N U A L
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5.2 CURRENT OUTPUT CALIBRATION
This procedure is intended for calibration/verification of output current by the user. True
verification of current output for Quality Control purposes must be performed with a calibrated
External Calibration Shunt. This shunt may be obtained from Arc Machines, Inc. (Part Number
13B072511-01).
All personnel attempting to calibrate, trouble-shoot, or repair the Model 205 must be
familiar with its operation. They must understand the circuits and have a complete
understanding of the controls and their relationships.
All personnel must be aware of the location of hazardous voltage-carrying
conductors, terminals, heat sinks, etc. and must employ safety precautions when working
with the Model 205.
EQUIPMENT REQUIRED
• Digital Multimeter (DMM), minimum 4-digit readout. The meter must have
floating inputs (not connected to line or chassis ground) with a minimum of
1 mega ohm input impedance. Battery operated devices are recommend.
Suggested: Fluke Model 8060A or equivalent.
• AMI Fusion Weldhead rated for 150 amperes and a pipe or tube that will
not melt away with 150 amps applied. As an alternative a manual torch
can be set up on a flat plate (refer to Section 5.2.2).
• AMI External Shunt, 1 mV/amp, Part Number 13B072511-01 (optional).
• Argon or other acceptable GTAW gas source.