- Open the battery cover of the data logger.
- Move the power switch to the On position.
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Look at the display and verify that:
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Battery indicator shows full batteries .
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Display shows measurement readings instead of dashes or error codes.
If measurement readings are not shown after a few seconds, check that the probe is properly connected. It is possible to disconnect the probe by pulling on the probe with the battery cover open.
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- Move the power switch to the Off position.
- Close the battery cover of the data logger. Push the latch down until you hear a click. If the cover does not close easily, push the probe (or extension cable) in and try again.