Common Infrared Thermometer Errors and How to Fix Them
As is well known, precision instruments such as online thermometers are indispensable in industrial production to monitor the temperature of objects. Online infrared thermometers are already very mature and common in factories. Online infrared thermometers are usually used in conjunction with instruments and often appear in the form of transmitters. That is, the output signal of the infrared thermometer is processed by relevant circuits and converted into some standard signal outputs, such as 0-5V voltage or 4-20mA output. There may be some minor malfunctions during the matching use. Here are several common fault phenomena and their solutions:
1: When the temperature of the measured medium rises or falls, the output of the online infrared thermometer does not change. This situation is mostly due to the sealing problem of the online infrared thermometer. It may be that the online infrared thermometer is not sealed properly, or a small hole was accidentally welded during welding. This situation usually requires replacing the infrared thermometer housing to solve.
2: The output error of the online infrared thermometer is large. In this case, there may be multiple reasons. If the online infrared thermometer is replaced, the linear range of the new infrared thermometer may not be consistent with the original one, resulting in sensitivity errors. Usually, after changing the infrared thermometer, it needs to be recalibrated. Of course, the output error of the online infrared thermometer is large, and it is also possible that the infrared thermometer was not calibrated properly when it was shipped. In this case, recalibration is sufficient.
3: The output signal of the online infrared thermometer is unstable, which is due to the temperature source itself. Many temperature sources themselves are generally not at a constant temperature. If possible, they can be observed under important indoor temperature conditions and other instruments can be used to monitor whether the output signal of the infrared thermometer is stable. If only the instrument display is unstable, it means that the anti-interference ability of the display instrument is not strong. Of course, the reasons listed here are only some of the more common ones. In practical use, it is also necessary to understand the types and application characteristics of online infrared thermometers in order to better utilize them.
