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Desired action: Please store the thermometer at room temperature.
Error: Display shows “ ERC” + backlight is red + 3 beeps sound .
Meaning: EEPROM data reading error or the correcting process is not nished.
Desired action: Please contact your supplier.
Error: Display shows low-voltage signal (not blinking).
Meaning: The battery voltage is below 2.61V±2%.
Desired action: Please replace the batteries according to the instructions.
Other signals:
“ L˚ ”: Measurement is below 32.0˚C or 89.6˚F in Head-mode or below 0.0˚C or 32˚F
in Ear-mode/ Ambient temperature mode. Please make sure you are following the
instructions on how to get accurate measurements.
“ H˚ “: Measurement is exceeding 42.2˚C or 108˚F in Head-mode or over 100.0˚C or
212˚F in Ear-mode / Ambient temperature mode. Please make sure you are following
the instructions on how to get accurate measurements.
9. Technical Information
Model: Dual Mode Infrared Thermometer DMT-489
Applicable regulations and laws: ASTM 1965/EN12470-5/GB/T 19146-2010
Temperature units: ˚C/˚F, adjustable
Measurement range Forehead-mode: 0.0˚C-100.0˚C / 32.0˚F-212.0˚F
Measurement range Ear-mode: 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
Low-voltage display function: low-voltage sign shows when the voltage is below
2.51V±0.15V
Memory function: capacity of 20 data sets
Current consumption: I stand-by<2μA; I working<0.5mA; I Buzzer on<2mA;
I backlight<15mA
LED backlight specications: ≧1.2cd/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
Battery life: ≧3000 measurements
Accuracy (for clinical test): maximum allowable error for clinical test=
Terror = T1-Tref + T2-Tref 2 ≦0.3˚C/0.6˚F (for 95%) (T1 and T2 represent temperature
value for thermometer under test; Tref represents the constant reference temperature).
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