Key points and precautions for cleaning infrared thermometer

1 Try to set some "baffles" around the infrared thermometer, or even cover the thermometer with a thin metal plate In this way, sundries can be prevented from contaminating the thermometer and some movable parts, and this kind of "contamination" will often make the movable part movement uncomfortable, and affect the weighing accuracy The following methods can be used to judge whether the system has uncomfortable movement That is to say, add or reduce about one thousandth of the rated load on the scale platform to see if the electronic weighbridge weighing display device reflects, indicating that the movable part is not "contaminated" 2 All wires leading to or from the display circuit shall be shielded cables The connection and grounding point of shield wire shall be reasonable If it is not grounded through the mechanical frame, it is grounded externally, but the shield wires are not grounded after they are connected with each other, which is floating Note: three thermometers are connected in full parallel The thermometers themselves are made of 4-wire thermometers, but they are connected in 6-wire junction box The output signal readout circuit of the thermometer shall not be placed in the same box with the equipment with "controllable silicon, contactor, etc.", which can generate strong interference, and the equipment with considerable heat generation If this cannot be guaranteed, the barrier plate shall be set between them for isolation, and the fan shall be installed in the box The electronic circuit used to measure the output signal of the optical fiber thermometer shall be equipped with independent power supply transformer as far as possible, instead of sharing the same main power supply with the contactor and other equipment 3 The infrared thermometer shall adopt the hinged copper wire (with a sectional area of about 50mm2) to form the electrical bypass to protect them from the hazards caused by the welding current or lightning stroke In the use of thermometer, it is necessary to avoid strong thermal radiation, especially one side 4 Electrical connection (for example, the signal cable of the thermometer shall not be arranged in parallel with the strong current power line or the control line infrared dual color thermometer (for example, the signal line of the thermometer and the strong current power line and the control line shall not be placed in the same pipe) If they must be placed in parallel, the distance between them should be kept above 50cm, and the signal wire should be sheathed with metal pipe As we all know, some pollution on the lens of the infrared thermometer will not affect the accuracy of the two-color infrared thermometer, but it has a great impact on the monochromatic infrared thermometer Of course, if the lens is too dirty, so that the sensor head can not get enough infrared energy, even if it is a two-color infrared thermometer, the measured temperature value will have a big deviation, so in daily maintenance and use, we should pay attention to keep the lens clean, to ensure the normal operation of the thermometer, to meet the measurement needs.