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Sean WilsonJul 30, 2025
Why does my Physio Logic ProScan 016-660 display 'Lo' with a green backlit screen?
- IIsaiah CaseyJul 30, 2025
A green backlit screen displaying 'Lo' on your Physio Logic Thermometer means the measured temperature is below a certain threshold. In Body mode, this indicates a temperature less than 32°C (89.6°F). In Surface or Air mode, it means the temperature is less than 0°C (32°F). If taking body temperature, ensure no hair or perspiration interferes with the reading. For surface or air temperature, check for air drafts or significant changes in ambient temperature. If the thermometer continues to show 'Lo', it could indicate a low body, surface, or air temperature.