The principle and application range of the new infrared thermometer
Infrared temperature measurement technology has been developed to scan and measure the temperature of the surface with heat change, determine the temperature distribution image, and quickly detect the hidden temperature difference. This is the infrared thermal imager. The infrared thermal imager was first applied to the military, the United States. TI has developed the world's first infrared scanning reconnaissance system in 19 years. In the future, infrared thermal imaging technology has been used in aircraft, tanks, warships and other weapons in the West, and the thermal imaging system as a reconnaissance target has greatly improved. The ability to search and hit targets. Fluke infrared thermometers are leading the way in civil technology. However, how to make infrared temperature measurement technology widely used is still a research topic worth studying.
Thermometer principle
The infrared thermometer consists of an optical system, a photodetector, a signal amplifier, signal processing, and display output. The optical system converges the target infrared radiation energy within its field of view. The size of the field of view is determined by the optical components of the thermometer and their position. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal passes through the amplifier and the signal processing circuit, and is converted to the temperature value of the measured object after being corrected according to the algorithm of the internal treatment of the instrument and the target emissivity.
In nature, all objects with temperatures above absolute zero are constantly emitting infrared radiation energy to the surrounding space. The magnitude of the infrared radiation energy of an object and its distribution by wavelength - is very closely related to its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, it can accurately measure its surface temperature, which is the objective basis on which infrared radiation is measured.
Infrared Thermometer Principle The black body is an idealized radiator that absorbs the radiant energy of all wavelengths. Without the reflection and transmission of energy, the surface emissivity is 1. However, the actual objects existing in nature are hardly black. In order to clarify and obtain the law of infrared radiation distribution, it is necessary to select a suitable model in theoretical research. This is the quantized vibrator model of body cavity radiation proposed by Planck. The law of Planck blackbody radiation, the blackbody spectral irradiance expressed in wavelength, is derived. This is the starting point of all infrared radiation theory, so it is called the blackbody radiation law. The amount of radiation of all actual objects depends on the wavelength of the radiation and the temperature of the object, as well as the type of material that makes up the object, the method of preparation, the thermal process, and the surface state and environmental conditions. Therefore, in order to apply the law of blackbody radiation to all practical objects, it is necessary to introduce a proportionality factor, ie, emissivity, related to the material properties and surface state. This coefficient indicates how close the thermal radiation of the actual object is to the blackbody radiation, with values ​​between zero and less than one. According to the law of radiation, as long as the emissivity of the material is known, the infrared radiation characteristics of any object are known. The main factors affecting the emissivity are: material type, surface roughness, physical and chemical structure and material thickness.
When using the infrared radiation thermometer to measure the temperature of the target, first measure the amount of infrared radiation in the range of the target, and then calculate the temperature of the target by the thermometer. The monochromatic thermometer is proportional to the amount of radiation in the band; the two-color thermometer is proportional to the ratio of the amount of radiation in the two bands.
Features
1. CE certification is qualified.
2, simple, lightweight, one-handed operation.
3. Backlight display.
4. After releasing the “MEASURE†button, the reading value is automatically locked.
5. The user can select the Celsius or Fahrenheit temperature unit display. External thermometer
6. Fixed emissivity (ε) 0.95.
7, automatic shutdown function.
8. Use a thermopile sensor (6-14μm).
9, with PVC? dust jacket.
Application range
Measuring electrical equipment
The non-contact infrared thermometer measures the surface temperature of an object from a safe distance, making it an indispensable tool in the maintenance of electrical equipment.
Electrical equipment application
In the following applications, equipment failure and unplanned power outages can be effectively prevented.
The connector-electrical connection will gradually loosen the connector, generating heat due to repeated heating (expansion) and cooling (shrinkage), or surface dirt, carbon deposits and corrosion. Non-contact thermometers can quickly determine the temperature rise that indicates a serious problem.
Motor - To maintain the life of the motor, check that the power supply cable and circuit breaker (or fuse) are at the same temperature.
Motor Bearings - Check for hot spots and repair or replace them regularly before problems occur that cause equipment failure.
Motor Coil Insulation - Extends its life by measuring the temperature of the motor coil insulation.
Measurement between phases - Check that the temperature between the wires of the induction motor, mainframe and other equipment and the phases of the connectors are the same.
The windings of the transformer-air-cooled device can be directly measured with an infrared thermometer to check for excessive temperatures, and any hot spots indicate damage to the transformer windings.
Uninterruptible Power Supply - Determines the hot point of the connection line on the UPS output filter. A low temperature point indicates that the DC filter line may be open.
Backup Battery - Check the low voltage battery to make sure the connection is correct. Poor contact with the battery connector may heat up enough to burn the battery core.
Ballast - Check for overheating before the ballast begins to smoke.
Utilities - Identify hot spots for connectors, wire connectors, transformers, and other devices. Some models of optical instruments range from 60:1 to larger, allowing almost all measurement targets to be within the measurement range.
Difference between non-contact infrared thermometer and contact thermometer
Fold edit this paragraph should pay attention to use
To locate a hot spot, to find a hot spot, the instrument aims at the target, and then scans the target up and down until the hot spot is determined.
Temperature measurement is not possible through glass. Glass has very special reflection and transmission characteristics and does not allow accurate infrared temperature readings. However, the temperature can be measured by the infrared window. Infrared thermometers are best not used for temperature measurement (stainless steel, aluminum, etc.) on shiny or polished metal surfaces.
Only the surface temperature is measured, and the infrared thermometer cannot measure the internal temperature.
Pay attention to environmental conditions: steam, dust, smoke, etc. It blocks the optical system of the instrument and affects accurate temperature measurement.
Ambient temperature, if the thermometer is suddenly exposed to an ambient temperature difference of 20 ° C or higher, allowing the instrument to adjust to the new ambient temperature within 20 minutes.
1. To avoid damage to the infrared thermometer, first use compressed air to remove large particles and dust, then wipe with a cloth.
2. Gently use a slightly moistened non-corrosive solution to clean the lens or a mildly diluted soap solution (solution or a mildly diluted soap solution (do not use a soft cotton cloth to wipe the lens (do not immerse the cloth in liquid) Wipe the lens with a soft cotton cloth (do not immerse the cloth in the liquid). Wipe the display gently with a clean computer monitor cleaning cloth.
3. Gently wipe the display with a clean computer monitor cleaning cloth.
4. Gently wipe the thermometer body with a clean, slightly damp cloth. If necessary, soak the cloth with a solution of water and a small amount of mild soap.
5. When the use is completed, please cover the lens cover with the infrared thermometer as soon as possible and put it in the carrying case for storage.
Beijing Heng Aode Instrument Co., Ltd. specializes in stainless steel water collector, tank bottom weld vacuum test box, reading instrument, eight-stage air microbial sampler, relay comprehensive tester, dual-wavelength scanner, coating thickness gauge, soil Crusher, tempered glass surface flatness tester, sound sensor, portable electric water level gauge, network mouth flow meter, corrosion rate meter, portable scratch tester, freezing point tester, water quality tester, online ammonia tester, coating Thickness gauge, coating thickness gauge, soil pulverizer, digital thermometer, gas sampling pump, ceramic impact tester, automatic crystallization point tester, drug freezing point tester, reed switch tester, constant temperature water bath , gasoline root transfer, gas sampling pump, tempered glass tester, water quality tester, PM2.5 tester, inhalable particulate matter detector, high frequency heat sealing machine, strain control triaxial instrument, milk somatic cell detector, helium gas concentration Detector, soil moisture conductivity tester, field strength meter, collection box, color ratio tester, capillary water absorption time measuring instrument, redox potentiometer vibrometer, Carbon oxide carbon dioxide detector, CO2 analyzer, oscillopolarograph, slime content tester, automotive starter power supply, automatic potentiometric titrator, portable thermometer, zirconia analyzer, reed switch tester, precision conductivity Instrument, TOC water quality analyzer, microcomputer plasticity measuring instrument, wind direction station, automatic spotting instrument, soil oxidation reduction potentiometer, digital thermometer, portable total phosphorus tester, corrosion rate meter, constant temperature water bath, residual chlorine detector , free expansion rate meter, centrifugal cup, concrete saturated vapor pressure device, particle strength tester, gauss meter, automatic film coating machine, safety valve grinding tool, weather station, kinesthetic azimuth instrument, dark adaptation instrument, smell collector, rainfall Meter, four-in-one gas analyzer, emulsion concentration meter, dissolved oxygen meter, temperature measuring instrument, thin layer paver, temperature recorder, aging meter, noise detector, constant temperature and humidity chamber, split resistivity tester, Companies adhering to the "customer first, forge ahead" business philosophy, adhere to the "customer first" principle to provide our clients with quality services. Welcome patrons!
20*4.5cm Air Fryer Paper Lining
Guangxi U-Yee Environmental Technology Co.,Ltd , https://www.biodegradetableware.com