Maintenance 2
Batteries
Extending Battery Operation Time
Charging the batteries when they are not completely empty, reduces the battery operating time for the Fluke 43B. To keep the batteries in optimal condition, observe the following guidelines:
•Operate the Fluke 43B on batteries until the 
symbol appears at the top of the screen. This indicates that the batteries are very low and that they need to be recharged.
•
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To extend battery operation time, you can refresh the batteries. During a battery refresh, the batteries will be discharged and charged completely. A complete refresh cycle takes about 12 hours and should be done about four times a year.
Open the main menu.
INSTRUMENT SETUP
3 | START BATTERY REFRESH |
Make sure the Fluke 43B is powered with the power adapter.
4 | Press YES to continue. |
Do not disconnect the power adapter.
This will interrupt the refresh cycle.
Note
After start of the battery refresh cycle, the screen will be blank. The backlight is on during the refresh cycle.
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