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Maintaining the Test Tool
Extending Battery Operation Time
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Extending Battery Operation Time
Typically, NiMH batteries always meet the specified
operating time. However, if the batteries have been
extremely discharged (for example, when empty batteries
were stored for a long period) it is possible that the
battery condition has deteriorated.
To keep the batteries in optimal condition, observe the
following guidelines:
• Operate the test tool on batteries until the
symbol appears at the bottom of the screen. This
indicates that the battery level is low and that the
NiMH batteries need to be recharged.
• To obtain optimal battery condition again, you can
refresh the batteries. During a battery refresh, the
batteries will be fully discharged and charged again.
A complete refresh cycle takes about 12 hours and
should be done about four times a year. You can
check the latest battery refresh date. See section
“Displaying Calibration Information”.
To refresh the battery, make sure that the test tool is line
powered and proceed as follows:
1 Display the USER key labels.
2 Open the User Options menu.
A message appears asking whether you want to start the
refresh cycle now.
3 Start the refresh cycle.
Do not disconnect the battery charger during the
refresh cycle. This will interrupt the refresh cycle.
Note
After starting the refresh cycle, the screen will be
black.