Changzhou OSK special cable Co., LTD

Select compensation wire precautions1. Selection of compensation wireThe compensation wire must be correctly selected according to the type of thermocouple used and the occasion of use. For example, the k pair should choose the compensation wire of the k pair, according to the use of the occasion, choose their own model. Generally, the operating temperature of kx is -20℃ ~ 100℃, and the wide range is -25℃ ~ 200℃. The common grade error is ±2.5 ° C, and the precision grade error is ±1.5 ° C.2. Connect the contactAs close as possible to the two contact points of the thermocouple connection line, try to keep the temperature of the two contact points consistent. If there is a fan in the instrument cabinet, take protective measures at the contact. Do not let the fan blow directly to the contact.3. Use lengthBecause the signal of the thermocouple is very low, it is at the microvolt level, so in use because the distance is too long, the signal attenuation and the interference coupling of strong electricity in the environment, it is enough to lose the signal of the thermocouple, resulting in inaccurate measurement and control of temperature, and temperature fluctuations may occur in serious cases.According to our company's experience, the length of the thermocouple compensation wire should be controlled within 15 meters, if more than 15 meters, it is recommended to use a temperature transmitter for signal propagation. The temperature transmitter converts the potential value corresponding to the temperature into the current transmission, which has strong anti-interference.Step 4: WiringThe wiring of the compensation wire must be away from the power line and the source of interference. If you can't avoid crossing places, try to cross them as much as possible, not parallel.5. Shield compensation wiresIn order to improve the anti-interference of thermocouple wire, shielding compensation wire can be used. For nearby interference sources more occasions, the effect is more obvious. However, the shielding layer must contact the ground, otherwise the shielding layer not only does not play a shielding role, but enhances the interference.

The structure principle of armored thermocouple is: by the thermocouple effect, high purity magnesium oxide and small rust steel protection pipe through multiple composite drawing, with bending, high pressure resistance, shock resistance, thermal response time fast and durable and many other advantages, called to directly measure the temperature of liquid, gas medium and solid body surface in the range of 0~800℃ in various production processes. If there is no special explanation, our company's standard products with a diameter of less than 8mm are Kaifu thermocouples.The prefabricated thermocouple is mainly composed of junction box, protective tube, insulating sleeve, wiring terminal and thermal electrode, and is equipped with various mounting and fixing devices. Thermocouple commonly used compensation wire specificationsAccording to the temperature range applicable to the compensation wire, our company's standard products mainly use two kinds of compensation wire :PVC compensation wire and metal mesh compensation wire, of which PVCCompensation wire core is multi-strand, soft texture, temperature resistance limit is 80; Metal mesh compensation wire core is a single strand penalty, anti-ten disturbance performance is good, the temperature limit is 400 temperature sensor selection: determine the thermocouple temperature sensor type, the actual use of temperature range, accuracy, size and installation fixing method, etc., according to the needs of reference and detailed selection data, also called according to the customer's drawings or sample processing customized.

The circuit problem has always been the focus of many people's attention, because if there is no power, then the impact and harm caused are relatively huge, then how to get a better actual change effect? In fact, one of the most important ways is to choose the compensation wire, which is currently one of the most effective methods, and the actual use of the compensation wire is also better, many areas are used, the effect has been better.However, there are also some areas that have not tried to choose such an effect, and such a choice is not very reasonable, so how to change this problem? In fact, in addition to the choice of compensation wire, there is no other better way, which is now one of the difficulties encountered by many choices.If there is no better choice, then it is obviously more appropriate to try to use such a method, and the actual price of the compensation wire is not too high, the actual value and effect can bring is better, these are the actual value brought by such a product.