To adjust the temperature difference of the thermometer, follow these steps
First, choose a qualified temperature measuring gun, turn on the thermometer, and select the same point for the infrared ray of the temperature measuring gun and the infrared ray of the thermometer. Compare the values measured by the two temperature measuring devices. When the temperature measured by the thermometer is higher than When the temperature gun is on (or below), adjust the temperature of the thermometer. Specific steps:
1. Select SET (green key), press and hold for 3 seconds, PR55 will appear, press ﹥ to shift, and the password is 2000 to unlock.
2. Press SET (green key) and select Pb value for temperature correction. For example: the actual temperature measured by the thermometer is 250 degrees, but the temperature measuring gun displays 220 degrees, and the temperature difference is 30 degrees. You need to press the V key to select -30. When the thermometer When the temperature is lower than the temperature measuring gun, press the ∧ key to select the ten-phase difference value. Then press and hold SET (green key) to restore the actual measurement interface. Note: When selecting the Pb value, no factory values can be adjusted.
The principle of infrared thermometer is as follows:
1. Infrared principle
As long as the temperature of any object is higher than absolute zero (-273°C), thermal radiation will be emitted to the outside. The energy radiated by the object is different with different temperatures, and the wavelength of the radiation wave is also different, but it always contains infrared. Including radiation, the strongest electromagnetic wave in the thermal radiation of an object below a thousand degrees Celsius is infrared wave. Therefore, by measuring the infrared radiation of the object itself, its surface temperature can be accurately determined. This is the objective basis for the infrared thermometer to measure temperature. Base.
2. Working principle
Non-contact infrared thermometer consists of optical system, photodetector, signal amplifier, signal processing, display output and other parts. The optical system gathers the infrared energy radiated by the target object, focuses it on the photodetector, and converts it into a corresponding electrical signal. After passing through the circuit operation and processing circuit, it is converted into a linear temperature signal value of the measured target. In order to achieve further signal processing and control.
