Switching between Fahrenheit and Celsius on the Paryvara TH 1420 infrared digital thermometer is straightforward. Here's how:
- Ensure the thermometer is powered off. If it's on, allow it to automatically shut down, which usually takes about 10 seconds.
- With the device off, press and hold the "Ear" button for approximately 8 to 12 seconds.
- The display will initially show "_ _ _ M". Continue holding until you see "_ _ _ ºF".
- Release the "Ear" button as soon as "_ _ _ ºF" appears on the display.
- Within 5 seconds, press the "Ear" button again.
- The LCD should now display "_ _ _ ºC", confirming the temperature unit has been changed to Celsius.
- Allow the thermometer to automatically power off. These steps are based on the Paryvara TH 1420 Infrared Digital Thermometer's manual.