iProven DMT-489 Forehead Thermometer User Guide


iProven DMT-489 Forehead Thermometer User Guide


Safety Instructions

  1. The ear measuring function of this thermometer is not suitable for children under 6 months of age.
  2. This device is not intended to serve as a continuous monitoring device.
  3. This device is not waterproof. Please keep it away from water or other liquids. Carefully follow the instructions in the cleaning section when you need to cleanse and disinfect your device.
  4.  Please do not use the product if the temperature sensor of the thermometer shows any sign of damage. Do not try to repair the product if it is damaged. Instead, please contact our customer support at www.iproven.com.
  5. The use of this thermometer is not intended to take the place of appropriate medical supervision.
  6. This thermometer consists of high quality, precision-made parts. It is not designed to be impact- or shock-resistant. Avoid dropping the product or subjecting it to intense shock or vibration.
  7.  Do not twist the thermometer or the temperature sensor.
  8.  Remove the batteries if the thermometer will not be used for more than three months.

 Purpose of the Device

This thermometer is intended to be used to measure the body temperature of humans who are a minimum of six months old when using the ear measuring function and suitable for all ages when using the head function. It measures the body temperature based on heat radiating from the eardrum or from the forehead. Although this thermometer has undergone extensive clinical tests and is considered safe and highly accurate, it is intended for non- professional home use only.

Description of the Device


  1. Infrared sensor: Take off the cover before detecting the eardrum temperature.
  2. Head-button: starts measurement of forehead temperature.
  3. Ear-button: starts measurement of eardrum temperature.
  4. LCD display
  5. Battery cover

Description of the Display


  1.  Ambient temperature
  2.  Ready for measurement
  3.  ˚C / ˚F
  4.  Memory
  5. Head-function
  6.  Ear-function
  7.  Battery
  8. Digits

 Setup instructions

First use
Before using this product for the first time, the battery protection tab must be removed. Remove this plastic tab by gently pulling it out of the battery compartment.

 Replacing the Batteries

  1. Release the battery cover by gently sliding it down.
  2.  Remove the battery cover.
  3.  Replace both AAA- batteries according to the polarity marked on the battery chamber.
  4.  Replace the battery cover and make sure all of the pins of the cover are aligned with the gaps.
  5. Close the battery cover by sliding it up until you hear a click.

Operating instructions

Precautions for Accurate Measurements
Carefully follow these instructions to ensure accurate temperature readings:

  1.  Ensure that the thermometer lens is clean.
  2. This will allow the thermometer to adjust to the new conditions and prepare it to give the most accurate readings.
  3.  Ensure that the ears are clean. Earwax influences the accuracy of the measurement.
  4. Utilize the thermometer in a closed room where there is no strong breeze or draft.

How to Correctly Perform an Ear Measurement:


  1. Remove the sensor cap to expose the sensor probe.
  2.  For adults, pull the ear backward and upward with your free hand to straighten the ear canal (image 1).
  3.  Gently insert the sensor into the ear canal.
  4.  Ensure that the sensor is aimed directly toward the eardrum (image 2).
  5.  If the ear canal is not straightened, inaccurate readings may result (image 3).
  6.  For children between 6 and 12 months old, pull the outer ear straight backward (image 4).
  7. A beep indicates that the measurement has been taken and the thermometer may be removed from the ear.
  8.  Look at the display to read the temperature.
  9.  Clean the sensor and cover it again with the sensor cap

 Memory Retrieval
The memory of this thermometer has a capacity of 20 measurements. To retrieve stored measurements follow these instructions:

  1.  If the display is not dark, leave the buttons untouched for 10 seconds.
  2.  The retrieved information includes the measured temperature and the type of temperature.

 Switch Between Fahrenheit and Celcius

  1.  If the display is not completely dark, leave the buttons untouched for 10 seconds.
  2. Release the ear button and immediately press it again to switch the temperature scale.

 Measurement Results

 Room Temperature Measurement
This device may be used to measure room temperatures between 32 ˚F and 89.5 ˚F, as well as 108 ˚F to 212 ˚F. This corresponds to 0.0 ˚C to 32 ˚C and 42.2 ˚C to 99.9 ˚C.

Out-of-Range Temperatures
Temperature measurements that are outside the measurement ranges will result in error codes L ˚ or H ˚ on the display, accompanied by beeps and the display lighting red for three seconds. “L ˚” indicates that the measurement is below 32 ˚F, or 0 ˚C. “H ˚” indicates a measurement exceeding 212 ˚F, or 100.0 ˚C.


  • Regularly clean the thermometer sensor with a damp cloth, moistened slightly with water.
  •  If you desire disinfecting the sensor probe you can do so by using a disinfecting wipe or a cotton ball damped with a disinfectant.
  • You can prevent the sensor from getting stained by ensuring the ear canals are clean.

Caution: This thermometer is not waterproof!


  • Store this thermometer at room temperature. The most accurate temperature measurement is obtained when the thermometer and the user have both been exposed to the same ambient temperature for at least 30 minutes.
  • Always store this thermometer in the enclosed soft case to prevent it from collecting dust or being exposed to bacteria.
  •  If your thermometer is likely to remain idle for more than 90 days, we recommend you remove the batteries and store them separately.


  •  Error: Display shows “ ER1” + backlight is red + 3 beeps sound
  • Meaning: The room temperature has dropped below 10 ˚C/ 50 ˚F or exceeded 40 ˚C/ 104˚ ˚F. Desired action: Store the thermometer at room temperature.
  • Error: Display shows “ ERC” + backlight is red + 3 beeps sound
  • Desired action: Contact your supplier.
  •  Error: Display shows low-voltage signal (not blinking) Meaning: The battery voltage is below 2.61 V±2%.
  • Desired action: Replace the batteries according to the instructions.
  • “L ˚”: Measurement is below 0.0 ˚C or 32 ˚ F.
  •  “H ˚“: Measurement exceeds 99,9 ˚C or 212 ˚ F.

 Technical Information

  • Model: Dual Mode Infrared Thermometer DMT-489
  •  Applicable regulations and laws: ASTM 1965/EN 12470-5/GB/T 19146-2010
  •  Temperature units: ˚C/˚F, adjustable
  • Measurement range: 0.0˚C-100.0˚C / 32.0˚F-212.0˚F Precision: ±0.2˚C /±0.4˚F
  •  Display resolution: 0.1˚C/0.1˚F
  • Latency Time: 1 second
  • Sound: Volume 50 dB (Distance from dB Volume sensor to thermometer is 10cm)
  • Automatic shutdown function: ±10s
  •  Memory function: capacity of 20 data sets
  •  Current consumption: I stand-by<2μA I working<0.5mA
  •  I Buzzer on<2mA I backlight<15 mA
  • LED backlight specifications: 1.2 cd/m2
  • Operational conditions: ASTM 10˚C-40˚C (50˚F-104˚F)/15-95%RH
  •  Operational atmospheric pressure range: 860hPa to 1060hPa
  • Battery: Two 1.5V AAA type batteries



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