Chapter Five: Operation
How To Use the SYSCHK Feature
83
How To Use the SYSCHK Feature
Refer to System Check Calibration, page 61, for a description of the SYSCHK feature.
1. Verify that all vacuum fittings are tight.
2. For an absolute transducer, pump down the system to a base pressure less than the
resolution of the transducer. For a differential transducer, equalize the pressure on both
the reference port (Pr) and the measurement port (Px).
Refer to the transducer manual for pump down instructions.
3. Press the [
CAL
] key to enter the calibration screen.
4. Press an arrow key, ( [
] or [
] ), until the system check screen appears.
Ch 1
9.8799 Volts
SYSCHK
The SYSCHK reading should be between 9.5 and 10.5 Volts. A SYSCHK value outside
this range, indicates a problem with the pressure transducer or its cable.
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