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Digital Fever thermometer

rX545

Measuring sensor

Display field

ON/OFF button

Thank you for your purchase of this thermometer. To correctly utilize all the advantages of this product, you should 
familiarize yourself with these operating instructions before using the thermometer the first time. Keep these 
instructions in a safe place for future reference.

SPeCial FeatUreS

•  

automatic self-test:

 guarantees a specified measuring accuracy for each temperature reading! «ERR»‑(error) is 

immediately indicated if any deviation is registered.

•  

temperature measurement

 within 60‑90 seconds depending on measuring method used.

•  

Digital display

 for temperature changes as minor as 0.1°C / 0.1°F.

•  

automatic switch off:

 after approx. 10 minutes – for longer battery life. 

•  

Battery:

 Silver oxide high drain. (Non disposable)

imPortaNt SaFetY iNStrUCtioNS

•   The thermometer is suitable exclusively for measurement of body temperature.
•   The battery cover is sonic-welded with the main housing of the thermometer; the battery is well sealed inside the 

thermometer to reduce the risk of being swallowed by children.

•  Protect the thermometer from hitting and striking.
•  Avoid ambient temperatures above 60°C / 140°F. 

Never

 boil the thermometer!

•  Use only the commercial disinfectants listed in the section «cleaning and disinfecting» to clean the thermometer. The 

thermometer must be intact when immersed in liquid disinfectant.

•  

Warning:

 The thermometer contains a long‑life battery. For disposal, please comply with local regulations for special 

waste.

•  Do not use the device if you think it is damaged or if anything appears unusual.
•  Ensure that children do not use this device unsupervised; some parts are small enough to be swallowed.
•  The manufacturer recommends to verify the accuracy by an authorized laboratory every 2 years.
•  Do not store the unit under direct sunlight, at a high temperature , or in high humidity or dust. Performance may be 

degraded.

•  Using the unit in the immediate vicinity of mobile phones, microwave appliances or other devices with strong 

electromagnetic fields may result in impaired functioning.

• IP22: Protected against solid foreign objects of 12.5 mm diameter and greater. Protected against vertically falling 

water drops when the device is tilted up to 15°.

• Batteries and electronic instruments must be disposed of in accordance with the locally applicable regulations, and 

not as domestic waste.

• Do not use this device close to strong electromagnetic fields, such as mobile telephones or radio installations. Keep a 

distance from such devices when using this unit.

tUrNiNg oN the thermometer

To turn on the thermometer, push the button on the top; the display test is performed. Then at an ambient tempe rature 
of less than 32°C / 89.6°F, an «

l

» and a flashing «

°C/°F

» appear at the upper right of the display. The thermometer is 

now ready to use.

FUNCtioN teSt

Proper functioning of the thermometer is tested automatically each time it is turned on. If a malfunction is detected 
(measu rement inaccuracy), this is indicated by «

err

» on the display, and a measurement becomes impossible. In this 

case, the thermometer must be replaced.

USiNg the thermometer

During a measurement, the current temperature is displayed continuously. The «

°C/°F

» symbol flashes during this 

period of time. If the «

°C/°F

» is no longer flashing, this means that the measured increase in temperature is now less 

than 0.1°C / 0.2°F in 16 seconds and that the thermometer is ready for reading.
To prolong the life of the battery, turn it off after use by press ing the operating button briefly. Otherwise the thermo‑
meter will automatically turn off after about 10 minutes.

Storage oF meaSUreD valUeS

If you hold the button down for more than 3 seconds when turning the thermometer on, the maximum temperature 
stored automatically at the last measurement will be displayed. At the same time, a small «M» for memory will appear 
at the right of the display. After 3 more seconds, this value will disappear and the thermometer will switch to the 
normal measurement mode. Then the stored value is erased. 

SWitChiNg °C / °F

Press the button to turn the thermometer ON. The last measurement will display as mentioned in “Storage of Measured 
Values” above. Once the «

m

» disappears and before «

°C/°F

» start to flash, press the button again and you can toggle 

between 

°C 

or

 °F

.

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