NF BP4620, Instruction Manual

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7.6 Backup Battery
BP4620
7-7
7.6 Backup Battery
The contents of memory ( refer to “4.7 Memory Functions”) and other required parameters
and data are backed up by the BP4620's internal lithium battery.
The backup period varies depending on the temperature and use conditions, but when left without
power it is approximately five years.
The backed up contents are checked at power-on, and if the contents have become degraded, an
error message is displayed
( refer to “6.1 Error Messages”) and the values of the BP4620 are
reset to the initial values ( refer to “4.7 Memory Functions”) .
If the backed up contents have been lost due to battery exhaustion, the
icon blinks.
In such cases, the battery must be replaced. Contact NF Corporation or our agents.