Radiantek TH709L, Operating Instructions

Normal Body Temperature 

Normal body temperature is a range that will fluctuate throughout the day.   The normal range for adult body temperature is typically considered to 
be 36.1 to 37.8° C (97 to 100°F). The body temperature varies by age, person, gender, time of day, position of body, and is usually highest in the 
evening.    It can be affected by activity, emotion, clothing, medications, ambient conditions, hormones and other factors.   Normal temperature will 
also be different depending on the place on the body at which the temperature is taken, with rectal or ear temperature readings generally being 
higher than oral temperature readings, and armpit temperature readings generally lower than oral readings. 

Temperature variations affected by age: 

The "Clinical Bias” is -0.2 ~ -0.4°C. 

    The "Limits of Agreement” is 0.58. 
    The "Repeatability” is 0.17°C. 

Important Notes 

Trouble shooting 

Warranty 

Warranty: 12 months   
Manufacture Date: as the serial number (please open the battery cover, it is shown on the inside of the device.)

Ex.SN:E512A000001, the first “E” is External, the second number “5” is the last number of manufacture year, the third 
and the fourth number “12” is the manufacture month, the others is the serial number.

Note: The thermometer is calibrated at the time of manufacture. If you question calibration mode, the 

accuracy of temperature measurements or unexpected events at any time, please contact the dealers 
or nearest service address. 

  Please report to the manufacturer and the competent authority of the Member State in which you are 

established about any serious incident that has occurred in relation to this device.

Warning: No modification of this equipment is allowed. 

Please read the instructions for use       

  BF type applied part 

Portable and mobile RF communication equipment can affect medical electrical equipment such as this product.     
This device complies with CISPR 11 group 1, Class B. During measurement it is recommended to keep at least 1.5 meter separation between this 
device and the surrounding electrical devices. If interference occurs, please increase the separation further or turn off the electrical equipment in 
the vicinity. For detailed description regarding the EMC precautions you need to take, please contact our authorized representative or us on 
address as given below.   

Cleaning 
And Storage

T

he probe is the most delicate part of the thermometer. Use with care when cleaning the lens to 

avoid damage.   

** Replace the probe cover after each use to ensure an accurate reading and 

  avoid cross contamination

. 

a. Storage temperature range: It should be stored at room temperature

 between -20~+50°C

 , RH

≤

85% 

b. 

Transportation temperature shall be less than 70°C, RH

≤

95% 

c. Keep the unit dry and away from any liquids and direct sunlight.   
d. The Probe should not be submerged into liquids 

*

* If device is accidentally used without probe cover, clean the probe as follows:

a. Please use alcohol swabs or cotton swabs moistened with 70%~75% alcohol to clean the probe lens. 
b. Allow the probe to fully dry for at least 1 minute. 

Note:

Please check if the device is damaged once it drops. If you can’t make sure of it, please send   

the complete device to your local dealer for recalibration.     

Holding the thermometer too long may cause a higher ambient temperature reading of the probe. 
This could make the body temperature measurement lower than usual.

Battery 
Replacement

This device is supplied with one lithium cell CR2032x1. 
1. Open the battery cover: Insert a pointed object into battery cover pick hole. At the same time, use 

thumb to push battery cover out.   

2. Hold the device and flip the battery out with a small screwdriver.   
3. Insert the new battery under the metal hook

○

1

  and press the other side

○

2

  of the battery down 

until you hear a “Click”. 

4. Replace the battery cover 

The positive (+) side up and the negative (-) side pointed down.

Error Message 

Problem 

Solution 

The probe cover has not been installed well 

Please check the setting of the probe cover again.   
(Refer to the section of “Place the Probe Cover” ) 

Error 5~9, the system is not functioning properly. 

Unload the battery, wait for 1 minute and repower it. If the 
message reappears, contact the retailer for service. 

Measurement before device stabilization.

Wait for “Er1” to disappear.

The ambient temperature is not within the range between 
10

o

C and 40

o

C (50

o

F ~104

o

F). 

Allow the thermometer to rest in a room for at least 15 
minutes at room temperature: 10

o

C and 40

o

C (50

o

F ~104

o

F). 

Temperature taken is higher than +42.2

o

C (108°F) 

Check the integrity of the probe cover and take a new 
temperature measurement. 

Temperature taken is lower than +34

o

C (93.2°F) 

Make sure the probe cover is clean and take a new 
temperature measurement. 

Device cannot be powered on to the ready stage. 

Change with a new battery. 

IMPORTER 
Company Name?    

Company Name? 
General Information: Address? Website? 

AGE

Te

m

p

. 

Young 

Old 

High 

Low 

0 ~   2 years: 

    36.4°C (97.5°F) ~ 38.0°C (100.4°F)  

3 ~  10 years: 

    36.1°C (97.0°F) ~ 37.8°C (100.0°F)  

11 ~  65 years: 

    35.9

°

C (96.6°F) ~ 37.6

°

C  (99.7°F)  

> 65 years: 

    35.8

°

C (96.4°F) ~ 37.5

°

C  (99.5°F)