DPI JJT889 User Manual Download Page 1

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Mode

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Infrared

 

Thermometer 

User’s Manual

Settings

I

. Operation

1)

INSTALL BATTERIES

Open the battery cover, install 2 AA batteries, and close the 
cover. A partially filled battery symbol will show on the LCD. 
(Though the battery may be full, the battery icon will show a 
partially filled battery icon, this is normal.) 

After installing the 

new battery, you may need to wait 10 minutes for the 

thermometer to warm up. If the thermometer has not been 

used for a few hours, the next time it is powered on, the 

thermometer will take some time to read the ambient 

temperature.

2) C

ONTROLS

a

.

Power ON:

 Press the 

Temperature Trigger 

and the thermometer 

will 

power ON. Wait approximately 3 seconds and press the 

trigger again to measure temperatures. 

Must be within 2”- 6” 

of the subject for the thermometer to register a 

measurement.

b

.

SET:

 Press to turn volume ON/OFF. (The volume icon will appear 

on the 

LCD when the volume is ON and will disappear when the 

volume  is  OFF.)  Press  and  hold  to  access  the 

previous 

temperature  readings  list

.  (The  thermometer  can  store  the  16 

most recent temperatures taken.)

c

.

M: 

Press to change temperature reading units between Celsius 

and 

Fahrenheit. 

d

.

+/- :

 Press and hold the

 + 

button to change the temperature 

reading 

mode to Household items mode (indicated by a house 

icon on LCD) or Human temperature mode (indicated by a 
human head icon on LCD). When in the 

previous temperature 

reading list

 (Press and hold SET button to access previous 

temperature reading list), press to scroll up and down the list of 
saved temperatures. Press and hold 

or 

to clear the previous 

temperature reading list. 

II.

 

REPLACING BATTERIES

When the battery is low, the LCD will flash red 
and beep when trying to operate the 
thermometer.
Please replace with new batteries to keep thermometer 
operating normally.

 Once new batteries are installed, a 

partially filled battery symbol will show on the LCD. 

This is the software design. The battery indicator will 

always display what appears to be a partially filled 

battery.

3)

MEASURING TEMPERATURES

Aim  the  thermometer  at  the  subject  you  wish  to  measure  the 
temperature  of  and  Stay  within  2”-  6"  of  the  subject's  surface. 
Press  the 

Temperature  Trigger

  on  the  front  of  the 

thermometer,  and  the  temperature  will  be  displayed  on  the 
LCD.

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