MK Products CobraTig 150 XM - Manual (Page 25)

CobraTig 150 Owner's Manual P/N 091-0541 - Page 25
Options from the CALIBRATION MENU include motor output and tachometer
feedback, current output and feedback, and arc voltage input.
In order to properly calibrate this machine, you will need the following: DC
power supply capable of producing 1.0 VDC to 20.0 VDC, a certified digital
multimeter, and various standard connection leads. To aid in the calibration
of this machine, purchase kit P/N 005-0251 (The instructions included with
the kit are for the model ACL Orbital Welder, they do not apply to this unit).
Use the instructions on the HELP screen for a full explanation on how to
calibrate this unit.
Help
Press this button to read a brief description of the CALIBRATION MENU
button descriptions and functions.
Main Menu
Press this button to return to the MAIN MENU.
1.8 VDC Calibration / 18 VDC Calibration
These two keys are used in conjunction for calibrating the arc voltage
feedback circuit. Use the information on the HELP screen to perform this
calibration procedure.
Connect an external DC voltage power supply to the shunt connectors
labeled ‘ARC VOLTAGE’ and adjust to 1.8 VDC input. Reference the
VDC bar graph on the LCD screen, and use the ADJUST UP or ADJUST
DOWN buttons to match bar graph to input value. Once bar graph value
is matched to the input value, press the 1.8 VDC button, this will set the
calibration.
Set the input to 18.0 VDC and repeat the above process. The procedure
will cycle through twice for an average reading and setting, then quit
when ready.
Adjust Up
Press this button to adjust the bar graph setting to match that of the ref-
erence value being read - voltage or current.
Motor Calibration
With the weldhead plugged into the CobraTig® 150 XM rear panel, the
motor voltage output to the weldhead, and tachometer feedback from the
weldhead rotor can be calibrated.