- Open the battery cover of the data logger.
- Move the power switch to the On position.
Look at the display and verify that:
Battery indicator shows full batteries.
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.
- 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.