Emerson Rosemount 700XA Reference Manual page 191

Reference Manual
2-3-9000-744
If the second calibration also fails this check, the GC raises a system alarm, Calibration
Energy Value Check Fail.
Recommended actions
6.1.26 Stored Data Integrity Failure
Archived results, event logs, and alarm logs are stored as records in the instrument
database along with a CRC16 checksum. When the data is retrieved, the gas
chromatograph (GC) recomputes the checksum and checks the stored checksum against
the calculated checksum. If they don't match, the GC raises a Stored Data Integrity Failure
alarm.
Recommended actions
6.1.27 ROM Checksum Failure
The gas chromatograph (GC) recomputes the firmware checksum at periodic intervals. If
the calculated checksum varies from the original value, the GC raises a ROM Checksum
Failure alarm.
Recommended actions
6.1.28 Sample Fluid Unavailable
The stream switching sequence defined in the Custom Logic configuration failed to
successfully execute.
Rosemount 700XA
1. Ensure the calibration gas bottle is open and not low or empty.
2. Check analyzed concentration results for each individual component versus
calibration gas concentrations in the Component Data table.
3. Adjust timed events if necessary.
1. Reset archives using the dialog under MON2020 → Logs/Reports Menu.
NOTICE
All archived data in the GC will be lost.
2. If this problem recurs, replace the central processing unit (CPU) board.
1. Re-flash the GC controller firmware in Rosemount MON2020: Tools → Upgrade
Firmware.
NOTICE
All archived data in the GC will be lost.
2. If this problem recurs, replace the central processing unit (CPU) board.
Troubleshooting
June 2022
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