Discussing the need to prevent infrared thermometers from interfering
During the use of infrared thermometers, there will be some interference to varying degrees. The degree of interference varies in different applications. This situation has brought a lot of trouble to applications in various fields. Therefore, anti-interference measures for infrared thermometers and methods to solve interference problems when interference is severe are another key issue in addition to design and development.
In the face of interference, sometimes people have no idea what to do, and they may not even think that the cause of the problem is interference. Therefore, when the infrared thermometer fails in some situations with strong electromagnetic waves, after eliminating the cause of the instrument itself, the first consideration is the problem of electromagnetic interference. There once was a case: a steel forging customer reported that one of the nine thermometers provided by our company had malfunctioned shortly after using it. The customer could not analyze the cause himself, and finally returned the infrared thermometer to the factory for repair. After the thermometer returned to the factory, it was tested by the technical after-sales department and everything was normal. The thermometer was sent back to the customer. After the customer installed and tested it, the fault persisted. Through telephone communication, it was estimated that it might be caused by interference at the customer's site. The company sent technicians to handle it on site. After arriving at the site, the technician First of all, the inspection found that the induced voltage of the thermometer shell is as high as 20V, and the induced voltage on the iron materials of other equipment is also more than 20V. There are high-voltage and high-frequency equipment around. It is estimated that the interference source comes from the thermometer and is received through the mounting bracket. Due to the huge source of interference from other equipment, the technicians decisively took measures to isolate the interference transmission path between the infrared thermometer and other equipment - adding a rubber pad between the infrared thermometer and the mounting bracket, and disconnecting the circuit board from the casing. Electrical connection, after installation, turn it on and test everything is OK. The fault is now eliminated. Other thermometers that did not malfunction were also processed in the same way. Everything is working fine for customers so far.
It can be seen from this that external interference has a huge impact on infrared thermometers. Sometimes it not only affects the data during the use of the instrument, but can even damage the instrument in serious cases.
