Infrared thermometer technical problems

First, why use infrared thermometer?

Infrared thermometers use infrared technology to quickly and easily measure the surface temperature of objects. Measure temperature readings without mechanical contact with the measured object. Just aim, press the trigger and read the temperature data on the LCD display.

Infrared thermometers are lightweight, small in size, easy to use, and can reliably measure hot, dangerous, or hard-to-reach objects without contaminating or damaging the object being measured.

Infrared thermometers can measure several readings per second, while contact thermometers take several minutes per second to measure.

Second, infrared thermometer how to work?

Infrared thermometers receive invisible infrared energy emitted by a variety of objects. Infrared radiation is part of the electromagnetic spectrum. It includes radio waves, microwaves, visible light, ultraviolet, R-rays, and X-rays. Infrared is located between visible light and radio waves. Infrared wavelengths are usually expressed in micrometers. The wavelength range is 0.7 micrometers to 1000 micrometers. In fact, 0.7 micrometers to 14 micrometers are used for infrared thermometers.

Third, how to ensure the accuracy of infrared thermometer temperature measurement?

The unambiguous understanding of infrared technology and its principles is its precise temperature measurement. When the temperature is measured by an infrared thermometer, the infrared energy emitted by the measured object is converted into an electric signal by the optical system of the infrared thermometer on the detector, and the temperature reading of the signal is displayed. There are several important factors that determine the precise temperature measurement. The most important factors are the emissivity, the field of view, the distance to the spot, and the location of the spot. Emissivity, all objects reflect, transmit and emit energy, and only the emitted energy can indicate the temperature of the object. When the infrared thermometer measures the surface temperature, the instrument can receive all three of these energy levels. Therefore, all infrared thermometers must be adjusted to read only the emitted energy. Measurement errors are usually caused by infrared energy reflected by other light sources. Some infrared thermometers can change the emissivity, and the emissivity values ​​for a variety of materials can be found in published emissivity tables. Other instruments were fixed with an emissivity of 0.95. The emissivity value is the surface temperature of most organic materials, paints, or oxidized surfaces that will be compensated with a tape or plain black paint applied to the surface under test. When the tape or paint is brought to the same temperature as the base material, the temperature of the tape or paint surface is measured as its true temperature.

The ratio of the distance to the spot, the infrared thermometer's optical system collects energy from the circular measurement spot and focuses on the detector. The optical resolution is defined as the ratio of the distance from the infrared thermometer to the object to the measured spot size (D :S). The larger the ratio, the better the resolution of the infrared thermometer and the smaller the measured spot size. Laser aiming, only to help aim at the measuring point. The latest improvement in infrared optics is the increase in near-focus characteristics, which provides accurate measurements in small target areas and also prevents background temperature effects.

The field of view ensures that the target is larger than the spot size measured by the infrared thermometer. The smaller the target, the closer it should be to it. When accuracy is particularly important, make sure that the target is at least 2 times the spot size.

Fourth, how to infrared thermometer temperature measurement?

In order to measure the temperature with an infrared thermometer, the infrared thermometer is aimed at the object to be measured, and the temperature data is read out on the LCD of the instrument according to the trigger to ensure that the ratio of the distance and the spot size and the field of view are arranged. There are several important things to keep in mind when using an infrared thermometer:

1, only measuring the surface temperature, infrared thermometer can not measure the internal temperature.

2, can not be measured through the glass, the glass has a very special reflection and transmission characteristics, does not allow accurate infrared temperature readings. However, temperature can be measured through the infrared window. Infrared thermometers are best not used for temperature measurement on polished or polished metal surfaces (stainless steel, aluminum, etc.).

3, positioning hotspots, to find hot spots, the instrument aims at the target, and then on the target for scanning up and down movement, until the determination of hot spots.

4, pay attention to environmental conditions: steam, dust, smoke and so on. It blocks the instrument's optical system and affects accurate temperature measurement.

5. Ambient temperature, if the infrared thermometer is suddenly exposed to an ambient temperature difference of 20 degrees or higher, allow the instrument to adjust to a new ambient temperature within 20 minutes.

What are the most common infrared thermometer applications?

Infrared thermometers have many applications. The most common are:

1. The automotive industry: diagnostic cylinders and heating/cooling systems.

2. HVAC: Monitors air stratification, supply/return records, and furnace performance.

3. Electrical: Check for faulty transformers, electrical panels, and connectors.

4, food: scan management, service and storage temperature.

5. Others: Many projects, bases and retrofit applications.

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