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Mobi DualScan Prime 3 Thermometer 

Thank you for choosing our DualScan Prime 3 Thermometer from Mobi. This high-
tech instrument measures body temperature via reflected infrared waves from 
within the ear canal or off the forehead, allowing you to determine this important 
health stat very quickly, easy, and accurately. The DualScan ™ Prime 3 will also scan 
and read temperature of food, baby bottles, or bath water. It even takes ambient 
room temperature. Knowing whether or not a patient or a loved one is running 
a fever can be critical, so to ensure proper use of this unit, please read the user’s 
manual carefully and keep it handy for future reference. 

Package Contents

Quantity 

Component 

1pc

DualScan Prime 3 Thermometer

2pcs 

AAA batteries

1pc

User’s Manual

Install Batteries

1. 

Open battery compartment 

2. 

Place new batteries in compartment facing the right direction as stated

3. 

Replace cover and its ready to use

Note: Do not mix new batteries with old batteries. 

Health Check Reminder Mode 

1. 

Press “B” button to set a health check reminder mode 

2. 

1

st

 press: activates function, 2

nd

 press: 30 minutes, 3

rd

 press: 45 minutes, 4

th

 

press: 60 minutes, 5

th

 press: OFF. 

3. 

After selecting a time for health check, it will begin to countdown .

4. 

When time is up, the thermometer will start to beep: indicating that it is 
time to check temperature again. 

Flashlight operation

 

Press and hold “D” button for 2 seconds to turn on/off flashlight operation. The 
light will turn off after 30 seconds if not being used. 

To check previous 19 temperature reading:

 

1. 

Press “D” button and release. With each additional press, unit will display 
previous stored temperature readings.

For best results:

• 

Do not touch or breath into sensor: it may cause inaccurate measurement 

• 

When the ambient temperature varies, thermometer should be placed in 
the area for 30 minutes before using 

• 

Do not use this thermometer for purposes other than intended 

• 

Do not expose the thermometer to any chemical solvent, direct sunlight, 
or fire/heat.

• 

Avoid using a mobile phone nearby when using the thermometer to mea-
sure temperature. 

• 

Only clean the tip with a lightly dampened lint free cloth.

• 

Avoid measuring temperature when the skin or ear canal is wet such as 
after swimming or bathing. 

• 

Avoid measuring sites of scarred tissue or skin disorders. 

Temperature measurement modes

1. 

Ear mode 

2. 

Forehead mode  

3. 

Object –measures room temperature or surface temperatures of objects 
via reflected IR waves from within a few inches away

Normal Temperature Range based on Age

  

Age Range

Normal temperature (°C)

Normal temperature (°F)

Note:

 A: Body temperatures scan button      

C: Object temperature scan button

   B: Health check reminder mode button
 

 D: Flashlight control & memory query button    

 E: C/F switch button

Forehead Temperature 

1. 

Press “A” button to turn unit on 

2. 

Make sure probe cover is attached. 

3. 

Gently place thermometer probe in the middle of forehead or side temples  

4. 

Press and hold “A” button for 1 second then release 

5. 

Temperature reading will be displayed on screen 

6. 

Press “A” button to go back to home screen

Ear Temperature 

 

1. 

Press “A” button to turn unit on 

2. 

Remove probe cover before taking ear temperature  

3. 

The ear icon will be displayed on screen automatically  

4. 

Place thermometer probe inside ear 

5. 

Press and hold “A” button for 1 second and release   

6. 

The temperature will be displayed on screen  

7. 

Press “A” button to go back to home screen

Object Temperature 

1. 

Press “A” button to turn the unit on 

2. 

Select icon for object temperature 

3. 

Hold thermometer probe 1-2inches away from object 

4. 

Press and release “B” button after 1 second 

5. 

Temperature reading will be displayed on screen  

6. 

Press “A” button to go back to home screen

 °C/°F Switch Mode 

 *** Open battery compartment and press “E” button to change from °C to °F.  

0-2 years old

36.4-38.0

97.5-100.4

3-10 years old

36.1-37.8

97.0-100.0

11-65 years old

35.9-37.6

96.6-99.7

65 years old

35.8-37.5

96.4-99.5

TROUBLESHOOTING 

Trouble/Error Message 

Check Situation 

Resolution 

No response/automatically resets 

Battery depleted? 
Battery in wrong polarity?
Battery is wrong type?
Poor battery contact?

Replace with new battery 
or take out the battery and 
reinsert in correct (+up) 
orientation and with good 
contact 

“Hi” symbol showing 

Is measurement affected by warm air flow? 
--in forehead and ear measurement mode-
- indicates measurement is greater than 
109.0°F (42.9°C) 
--in surface measurement mode—indi-
cates measurement is greater than 212.0°F 
(100.0°C) 

Wait for 30 minutes with 
no use of the unit, then 
measure again according 
to the instruction in this 
manual

“Lo’ symbol showing 

Is hair, sweat, or other moisture 
on the boy or on the sensor af-
fecting the temperature reading?

--in forehead and ear measure-
ment mode – indicates measure-
ment is less than 89.6°F (32.0°C)

--in the surface measurement 
mode—indicates that measure-
ment mode is less than 32°F (0°C)  

Wait for 30 minutes 
with no use of the 
unit, then measure 
again according to 
the instruction in 
this manual 

“Err” symbol showing 

When the ambient temperature 
is beyond the range of measure-
ment –between 50°F and 104°F 
(10°C and 40°C) 

Keep the thermom-
eter in the room 
with a temperature 
between 50°F and 
104°F (10°C and 
40°C) for 30 minutes

Has the sensor or hardware been 
damaged?

1

3

2

4

6004116A306-01A 说明书.indd   1

2015-2-27   10:39:38

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