5 Maintenance
154 Keysight U1253B User’s and Service Guide
Figure 5-5 Charging mode
7 The smart charging mode will start if the battery passes the self-test. The
charging time is limited to within 220 minutes. This ensures that the battery
will not be charged for more than 220 minutes. The display will count down the
charging time. When battery charging is in progress, none of the push-buttons
can be operated. To avoid overcharging the battery, the charging may be
stopped with an error message during the charging process.
–If the OVER LIMIT message is displayed, and there is a battery inside the
multimeter, please do not charge the battery.
–If the CHARGE ERROR message is displayed, check whether the battery is the
specified type. For the correct battery type, refer to “List of compatible
batteries for the Keysight U1253B:” on page 149. Please ensure that the
battery in the multimeter is the specified type of rechargeable battery before
charging it. After replacing any wrong battery with the correct specified type
of rechargeable battery, press to redo the self-test. Replace with a new
battery if the CHARGE ERROR message is again displayed.
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