• The logger may need new batteries. Symbols will appear on the logger LCD if the batteries have enough voltage remaining and are installed properly.
  • The logger is not within range of the phone or tablet, or something is obstructing the communication. Move closer to the logger. The range for successful wireless communication is approximately 30.5 m (100 ft) with full line-of-sight.
  • Make sure Bluetooth is enabled in your phone or tablet settings.
  • Try disabling the “Show Only My Devices” setting if necessary.

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Tech Note
Software