MC 9: System time lost (battery empty)
Published on by Ben Betzler, Reactor Physics Engineer
CLAIM:
- Day changes on each start
- Instrument time not correct
ANALYSIS:
Battery is at the end of its lifetime.
Technical/spares:
Ref.
135945 Battery & XTAL Timekeeper, for Mainboard MC 9
Info:
The MC 9 battery has a typical lifetime of 10 years; According our experience, first difficulties with empty/dead batteries start from a battery age of 7+ years.
If the battery is empty or nearly empty, the unit is losing its settings as language (e.g. change to default=German ), time, date, T-probe calibration values, etc. Such a battery must be replaced!
When the battery [empty] warning occurs for the 1st time, the unit might already have lost important data and therefore unconditionally requires service from a trained service technician! The battery must be replace and a full Operational Qualification (OQ) must be performed, e.g. to define calibration parameters, etc.!
Battery change:
We recommend to replace batteries after 7+ years in use at the next occasion.
If the battery is replaced, before any data loss error occurred, the procedure is simpler than after an error occurred.
The procedure for battery change is related and similar to FW exchange. There is no specific document for battery change available. Use the following information.
A) Battery replacement before an error occurred:
Info from battery manufacturer STMicroelectronics:
Citation AN1012, page 18/33:
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