70 1100 Series DAD and MWD Reference Manual
3 Troubleshooting and Test Functions
Calibration Values Invalid
The calibration values read from the spectrometer ROM are invalid.
After recalibration, the calibration values are stored in ROM. The processor
periodically checks if the calibration data are valid. If the data are invalid or
cannot be read from the spectrometer ROM, the error message is generated.
Probable Causes
• Defective detector main board.
• Defective optical unit.
Suggested Actions
✔ Exchange the detector main board.
✔ Exchange the optical unit.
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