What are the factors that affect the far-infrared thermometer gun?
1. The relationship between the size of the temperature measurement target and the temperature measurement distance: At different distances, the effective diameter D of the measurable target is different, so when measuring small targets, pay attention to the target distance. The definition of the distance coefficient K of the infrared thermometer is: the ratio of the distance L of the measured target to the diameter D of the measured target, that is, K=L/D
2. Infrared thermometer Select the emissivity of the material to be measured: Infrared thermometers are generally classified according to black bodies (emissivity ε = 1.00), but in fact, the emissivity of materials is less than 1.00. Therefore, when the true temperature of the target needs to be measured, the emissivity value must be set. The emissivity of a substance can be found in the "Data on the Emissivity of Objects in Radiation Thermometry".
3. Measurement of targets in a strong light background: If the target to be measured has a bright background light (especially if it is directly exposed to sunlight or strong lamps), the accuracy of the measurement will be affected. Therefore, objects can be used to block the strong light directly hitting the target. Eliminate background light interference.
4. Measurement of small targets
⑴The infrared thermometer should be fixed on a tripod (optional accessory)
⑵ Accurate focusing is required, that is: use the small black dot in the eyepiece to align the target (the target should be filled with small black dots), adjust the lens back and forth, and shake your eyes slightly. If there is no relative movement between the small black dots being measured, adjust the focus. The focus is complete
5.Temperature output function
(1) Digital signal output - RS232, RS485, temperature signal remote transmission
(2) Analog signal output - 0~5V, 1~5V, 0~10V, 0/4~20mA, which can be added to closed-loop control.
(3) High alarm and low alarm - If the temperature is required to be controlled within a certain range during the production process, high and low alarm values can be set. High alarm: When the high alarm setting is turned on, when the temperature is higher than the high alarm value, the corresponding LED light flashes, the buzzer sounds, and the AH normally open relay is connected.
Features of far infrared thermometer
1. Wide measurement range: Because it is a non-contact temperature measurement, the infrared thermometer is not in a higher or lower temperature field, but works at normal temperature or conditions allowed by the thermometer. Under normal circumstances, it can measure negative tens of degrees to more than 3,000 degrees.
2. Fast temperature measurement: that is, fast response time. As long as it receives the infrared radiation of the target, the temperature can be fixed in a short time.
3. High accuracy: Infrared temperature measurement will not destroy the temperature distribution of the object itself like contact temperature measurement, so the measurement accuracy is high.
4. High sensitivity: As long as there is a slight change in the temperature of the object, the radiation energy will change greatly, which is easy to measure. Temperature measurement of small temperature fields can be performed.
5. Temperature distribution measurement, as well as temperature measurement of moving or rotating objects, has long service life and high efficiency.
