Hypertherm PHC Sensor - Manual (Page 43)

Section 2: Installation and Setup 43
SW15 Torch Breakaway Switch
on (Sw NO) Open on Breakaway – Use normally open switch input *
off (Sw NC) Close on Breakaway – or switch not used
For the standard lifter, the torch breakaway uses a normally open proximity switch. When the breakaway is
installed, the switch closes. When the breakaway is tripped, the switch opens again.
SW16
Arc Voltage Calibration Mode
on Display actual arc voltage during idle state for calibration
off Normal – Display set arc voltage during Idle state *
For normal operation, this switch should be set to OFF.
This switch is used to display the actual arc voltage on the PHC display. This allows the arc voltage to be
calibrated by adjusting the Arc Voltage adjustment pot. When the calibration mode is active, the PHC displays
“X.X.X.” with the X’s indicating the measured arc voltage and all the decimal points on to indicate calibration
mode.
When calibration mode is active the display can be temporarily overridden by adjusting either the kerf detect
level or the stall force. If you adjust either the kerf detect or stall force, a 0 to 10 reference level displays
temporarily. After one second of inactivity the display reverts to the measured arc voltage.
NOTE: The arc voltage calibration procedure should be performed on all new installations
because the actual measured arc voltage accuracy is a combination of the individual plasma interface
and control units.