Fluke 41B, 39 user manual Battery Considerations, Memory Retention, Automatic Power Down

39/41B

Users Manual

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 bsymbol 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 Ooff, 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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