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102 Agilent U1251A/U1252A User’s and Service Guide
5 Maintenance
6 The smart charging mode will start if the meter passes
the self- test. The charging time is limited to not more
than 220 minutes. The secondary display will count down
the charging time. During charging, no buttons can be
pressed. The error message may appear during charging to
alert the user of any overcharging of the battery.
Figure 5-4 Charging mode
NOTE
• If the OL message appears while the battery is inside, do not charge the battery.
• If the C-Err message appears, check if the battery is the specified type. Use the
battery as specified in this manual. Ensure that the battery is the correct
rechargeable type before charging it again. After replacing with the correct
rechargeable battery, press Shift to perform the self-test again. If the C-Err
message reappears, replace with a new battery.