Maintenance 5
Keysight U1253B User’s and Service Guide 153
Figure 5-4 Performing self-test
Table 5-2 Error messages
Error Error message
OVER LIMIT
1 No battery inside
2 Faulty battery
3 Battery is fully charged
CHARGE ERROR
1 If charging battery more than 12 V or less than 5 V
2 In 3 minutes, if the battery voltage does not go
upwards then charge error
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