MKS Baratron 122A Series, Руководство пользователя

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Chapter Four: Operation How To Adjust the Zero
15
Chapter Four: Operation
How To Adjust the Zero
The 122 transducer zero should be adjusted by first pumping to a pressure below the gauge
resolution, and then setting the ZERO potentiometer for an output of zero volts (display reads
“0000”).
Note
The gauge should be in place and allowed to warm-up for at least 15
minutes before making this adjustment. Refer to Table 2, page 16, for
recommended zero pressure levels to use with various ranges of
transducers.
If available pressures are not sufficiently low to set the transducer zero, a vacuum leak detector
may be used. In this case, mount the transducer on the leak detector in the same plane of
orientation as where it will be used.
In production operations such as semiconductor manufacturing, it is recommended that the
transducer zero be verified and adjusted, if necessary, each time the equipment is shut down for
routine maintenance.
Note
Type 122 transducers are calibrated to specifications (refer to Appendix A:
Product Specifications, page 19) at the factory and every effort is made to
ensure that shipments arrive at your location free of defects or need for
further calibration other than zero adjustment. It is advised that users do
not attempt adjustments other than zero.