Knob Calibration; Transducer Calibration - Graco Ultimate 490 XT Operation, Parts

Knob Calibration

NOTE: Knob calibration should be
performed whenever a new pressure control
(potentimeter) is installed or the control
board is replaced.
1. To perform knob calibration, enter
secondary menu by holding menu
button while powering sprayer.
2. Use menu button to navigate to knob
calibration screen.
3. Set potentiometer to max spray
position, just before TurboClean.
4. Hold menu button until display shows
pass.
5. Turn potentiometer knob back to OFF
position before restarting and reusing
the sprayer.
3A9095C
Digital Display

Transducer Calibration

NOTE: Transducer calibration should be
performed whenever a new transducer is
installed or the control board is replaced.
1. Perform Pressure Relief Procedure,
page 14.
2. To perform transducer calibration, enter
secondary menu by holding menu
button while powering sprayer.
3. Use menu button to navigate to 0 (zero)
calibration screen.
4. Make sure dump valve is open and that
there is no pressure in sprayer.
5. Press and hold menu button until
display shows pass.
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