The Diagnostics Feature
Chapter Eleven: Troubleshooting
300
Code 9999: Factory Calibration
MKS Instruments performs factory calibration procedures on the 146 instrument. Part of the
calibration procedure involves entering Code 9999 while the 146 unit is attached to other
instrumentation. When 9999 is entered, the abbreviation CAL appears in the main display.
Nothing further can be done with this code because the 146 unit is not attached to the appropriate
calibration instrumentation. The 146 unit must be powered off to exit Code 9999.
Caution
1. If the code 9999 is shown in the main display, the Fail-Safe
feature has failed its self-test. Return the 146 unit to MKS for
repair.
2. If the number 26 appears in the main display, the relays did not
go to their default values within 26 milliseconds (the maximum
time on the counter). Return the 146 unit to MKS for repair.
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