Arc Machines 227 - Manual (Page 71)

MODEL 227
OPERATION MANUAL
Doc # 740063 Rev E
SECTION VII - CALIBRATION
7.0 INTRODUCTION
This procedure is intended for calibration/certification of system performance by the
user. Expect for the Current Servo all system functions are controlled by the
processor and no calibration points or steps are required . Rotation and Wire Feed
calibration are contained in Section V.
An examination of internal electronics will find several adjustment points. These
points are “Factory Pre-set” only and ARE NOT adjusted by the user.
WARNING
All personnel attempting to calibrate, trouble-shoot, or repair this system must be
familiar with its operation. They must understand the circuits and have a complete
understanding of the controls and their interrelationships.
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 a
welding machine.
Any testing or recording instruments connected to any points in the machine or to the
welding head may be exposed to extremely high transient voltage at the time the arc
starter operates . ENSURE THAT ALL TEST EQUIPMENT IS DISCONNECTED
DURING ARC START.
NOTE
Wire Feed and Rotation (Travel) Calibration, in conjunction with a Weld Head, are
performed on a frequent basis and are covered as part of Section V (operation).
7.1 EQUIPMENT REQUIRED FOR CALIBRATION
1. Digital Multimeter (DMM), minimum 4 - digit readout. Suggested: Fluke Model
8060A or equal . The meter must have floating inputs (not connected to line or
chassis ground) of minimum 1 megohm input impedance. Battery operated
devices are recommended.
2. Screwdriver, Calibration, small slot with 6” shaft and a 3/32 Allen Wrench
3. Any Weld Head rated for 100 amps or more pipe that will not melt away with
100 amperes or a manual torch set up on flat plate.
4. External Shunt, 1 mv/amp, PN 13B272504-01 (optional)
5. Dial Calipers
7.1