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Technical Specification: 

Human Body Temperature Measurement Range 

32-43⁰C (90-109⁰F)

Human Body Temperature Measurement Accuracy 

±0.3⁰C (±0.6⁰F) 

Object Surface Temperature Measurement Range 

0-100⁰C (32-212⁰F)

Object Surface Temperature Measurement Accuracy 

±1⁰C (±1.8⁰F) 

Resolution 

0.1⁰C (0.1⁰F) 

Response Time 

0.5s 

Distance to Measuring object 

2-3.15 in (5-8 cm)

Auto shut-off 

7s 

Function Settings: 

Press and hold 

«SET

 (left button) until you see 

“F1” appear in bottom right corner of screen. 
Press 

«SET

 (left button) to navigate between 

the following setting menus: F1 (Unit) 

 F2 

(Temperature Offset) 

 F3 (Audio On/Off) 

 

Exit Setting Menu. See each setting section for 
more details: 

Changing Temperature Units from C to F (F1)

 

Press and hold 

«SET

 (left button) until you see 

“F1” appear in bottom right corner of screen. 
While showing F1 Symbol in bottom right 
corner of the display, press 

»ADJ

 to switch 

between ⁰C and ⁰F. 

Temperature Offset Setting (F2) 

With F2 Symbol showing in bottom right corner 
of the display, press  

»ADJ

 (to increase) and 

MODE 

(to decrease) to adjust the temperature 

offset within the range of ±5⁰C ( ±9⁰F).  

Note:

 This offset option only works for body 

temperature mode. 

Audio ON/OFF Setting (F3) 

With F3 Symbol showing in bottom right corner 
of the display, press 

»ADJ

 to turn on/off audio. 

During the parameter setting mode, press the 
trigger to directly exit from the setting mode.     

Mode Switch 

Press 

MODE

 button to switch between Human 

Body

 Temperature measurement 

and 

Surface

 Temperature Measurement modes. 

Press and hold 

MODE

 button to switch between display languages. 

Summary of Contents for OS-820D

Page 1: ...lt setting for the temperature unit is in Celsius Please follow the below steps to change the temperature units to Fahrenheit Press and hold SET left button until you see F1 appear in bottom right corner of screen Press ADJ to switch from C Celsius to F Fahrenheit You should now see the temperature now displayed in F Fahrenheit Press trigger to go back to main screen Switching from surface tempera...

Page 2: ... measured temperature 2 Backlight button turn on off backlight Hold to change 3 Left Button during the measurement mode page up the stored temperature data records activate the parameter setting mode or during the parameter setting mode navigate the settings menu 4 Right Button during the measurement mode page down the stored temperature data records or during the parameter setting mode adjust par...

Page 3: ...ture Units from C to F F1 Press and hold SET left button until you see F1 appear in bottom right corner of screen While showing F1 Symbol in bottom right corner of the display press ADJ to switch between C and F Temperature Offset Setting F2 With F2 Symbol showing in bottom right corner of the display press ADJ to increase and MODE to decrease to adjust the temperature offset within the range of 5...

Page 4: ...to take one measurement The number on the button left corner shows the record number The backlight color indicates the different temperature range as follows Green Below 37 5 C 99 5 F Orange 37 5 C 38 C 99 5 100 4 F Red Above 38 C 100 4 F Data Record Management View Data Record Press SET left button and use ADJ right button to page up and down among the data records Delete Data Record Press and ho...

Page 5: ...aintenance Please follow the instruction manual for troubleshooting If the issue is not listed in the manual please contact our customer support Warning sign HI When using the thermometer for measuring body temperature the HI warning sign may come on The warning sign indicates the temperature measured exceeds the maximum allowed threshold 43 C 109 4 F Warning sign LO When using the thermometer for...

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