3. Control elements
Power button
4. Control panel
Item description
+
LCD screen
Press to turn on the device or turn it off by holding button for 3
seconds
Press to set calibration at zero or hold 2 seconds to switch
between ℃ and ℉.
Press to read the samples or hold it during 2 seconds to switch
between different measuring scales.
Reset to factory setting
Calibration button
Reading button
Use
4
Prism