JJF 1107-2003Calibration Specification of Infrared Thermometers for Measurement of Human Temperature (English PDF)

3.1 Terms

3.1.1 Calibration mode (direct measurement mode)

The display mode for infrared thermometer measurement or calibration. Display the temperature without any correction, that is, the measurement result of the blackbody temperature.

3.1.2 Estimation mode

The display mode for infrared thermometer measurement. Display the estimated temperature after the correction of environmental temperature changes, emissivity, measured body position and other factors.

5.1 Display temperature range

In any display mode, the display temperature range of the infrared thermometer shall cover the range specified in Table 1.

5.3 Environmental conditions

The allowable operating environment range for infrared thermometer to meet the laboratory error requirements specified in 5.2 shall cover the provisions in

Table 1.

5.4 Display and interface

5.4.1 Resolution

The display resolution shall meet the requirements of Table 1.

5.4.2 Display mode

5.6.4 Infrared thermometer user manual shall include but not limited to the following.

6.1 Environmental conditions

The temperature and humidity of the calibration laboratory environment shall meet the requirements of 18°C~28°C, (30~70)% RH and the operating environment conditions of the calibration equipment.

6.2 Standard and other equipment

6.2.1 Blackbody radiation source

The temperature range of the blackbody radiation source shall meet the calibration requirements of the thermometer to be calibrated.

6.2.2 Electrical measuring instruments that measure the analog output of

calibrated thermometer (if required).

6.2.3 Required bracket for calibration thermometer

7.1 Calibration items

7.1.1 Appearance inspection

The infrared thermometer and infrared screening instrument shall be in good conditions. Each function is normal and the probe shall be clean. If it uses battery power supply, when the battery power is insufficient, there shall be a low voltage prompt function.

7.1.3 Warning temperature measurement error

The infrared screening instrument looks for the warning temperature value near the preset warning temperature point to determine the warning temperature measurement error.

7.2 Calibration methods

See Table 3 for calibration methods.

7.2.1 Infrared thermometer

7.2.1.1 Repeat the measurement of the blackbody temperature at the set

blackbody temperature specified in Table 3.It can only select part of the blackbody set temperature in Table 3 or select the blackbody set temperature according to user requirements.

7.2.1.6 For laboratory error determination, measure and record the corrected

infrared thermometers ti, j and blackbody temperature tBBi (if blackbody is traceable to the radiation temperature, it shall be converted to the radiation temperature) at the nominal set temperature tsi of each black body. Determine laboratory error for each measurement. The laboratory error ei, j is defined as.

Where, tBBi is the blackbody temperature; ti, j is the jth temperature reading when the calibrated thermometer measures the blackbody temperature tBBi in the calibration mode; j indicates the order of readings.

7.2.2 Infrared screening instrument

7.2.2.1 Preheat the infrared screening instrument according to the time

specified in the user manual.