To change the unit of measurement on the PT1 Thermometer:
- Make sure the thermometer is OFF.
- Hold the measurement button [🌡] until ONLY the °C and °F symbols flash on the screen (approximately 8 seconds). Then release the button immediately.
- Briefly press the measurement button to toggle between Celsius and Fahrenheit, until only the desired unit flashes.
- Once the desired unit symbol flashes on the screen, hold the measurement button until the unit symbol stops flashing (approximately 8 seconds), then release the button, the thermometer will power off automatically.
Reminder: If you do not hold the measurement button for 8 seconds to confirm the unit selection before the screen switches off, the selection will not take effect.