39/41B
Users Manual
6
Battery Considerations
New alkaline C cells typically provide more than 48 hours of continuous
operation. You can also use NiCad batteries. However, depending on battery
condition, fully charged NiCad batteries provide 16 hours or less of
continuous operation.
Plan to replace the batteries as soon as possible after the
b
symbol comes on.
Refer to User Maintenance later in this manual for battery changing
instructions.
Note
After the Tester is dropped, it may not turn on. Check the batteries
to see if they are misaligned or damaged. Reseat the batteries if they
are misaligned; replace the batteries if they are damaged.
Memory Retention
Whenever you remove power from the Tester (pressing
O
off, letting the
batteries run down, removing the batteries, or experiencing an automatic
power down), the Tester retains all essential operating information in
nonvolatile memory. Specifically, the Tester retains calibration accuracy,
power-up configuration information, and any stored waveforms (Model 41B).
However, if you remove power when Record is active, the Tester loses all
recorded values.
Automatic Power Down
If you do not press any keys for approximately 15 minutes, the Tester
normally powers down automatically. If Record is active, the Tester continues
to operate unattended as long as the battery condition allows.
The Tester returns to its power-up configuration whenever you turn it on.
If the Tester encounters a memory error at power-up, it automatically turns
itself off. Check the batteries and try turning the Tester on again. If this
problem persists, contact a Fluke Service Center.
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