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technical article
Method for quickly detecting thermocouple
2011-10-21 14:54:43

通常 是与 电子计算机、显示仪表、记录仪表等配套使用 的; 隔爆热电偶 直接 生产现场 爆炸 点在 0 1300℃ 范围内的 存在碳氢化合物 液体、气体和蒸汽介质及固体表面温度等 进行 测量 的;当运用中 热电偶 出现故障时,我们可以抓住以下几个要点,简单快速检测出热电偶 的好坏: Thermocouples are usually used in conjunction with electronic computers, display instruments, recording instruments, etc. Explosion-proof thermocouples are directly at the production site , with explosion points in the range of 0 to 1300 ° C , and there are hydrocarbon liquids, gases, and vapors. And solid surface temperature ; when the thermocouple fails during application, we can grasp the following points and simply and quickly detect the quality of the thermocouple :

外观 上先 确定 热电偶 是否存在 问题 First, determine from the appearance whether there is a problem with the thermocouple ? Is it good or bad ? 通过 进一步的 检测确定。 Determined by further testing.

专用的瓷套管将 要检 热电偶 套上 ;然后,连同 标准铂铑热电偶一起放入管式电炉中 这种管式电炉 不是分析化学用的硅碳棒管式电炉 );并 热电偶 热端 插入管式电炉中 的圆 柱体中 ,这是一个 多孔 均热用 金属镍圆 制成的专用圆柱体;最后,把 冷端的补偿导线 放入零摄氏度 由冰水混合物保持的的容器中。 2. Put the thermocouple to be tested with a special ceramic sleeve ; then, put it into a tube electric furnace together with a standard platinum rhodium thermocouple ( this type of tube electric furnace is not a silicon carbon rod tube for analytical chemistry) Electric furnace ); and insert the hot end of the thermocouple into a cylinder in the tubular electric furnace , which is a special cylinder made of a porous , soaking metal nickel circle ; finally, the cold-end compensation wire , Place in a container maintained at zero degrees Celsius by an ice-water mixture.

检测合格的 标准 惠司登电位差计, 进行对 标准热电偶 与检 测热电偶 之间 产生的热电势差 ,进行测量 作下 记录 ;检测 热电偶 时, 要确保 管式电炉 的温度,始终 保持在的 允许的 最高温度 范围内; 根据记录的热电势差 对应的温度 可以判定 测热电偶超差为不合格。 3. Use a standard Wheatstone potentiometer that has passed the test to measure and record the thermoelectric potential difference between the standard thermocouple and the test thermocouple . When testing the thermocouple , ensure the temperature of the tube electric furnace . Always keep within the allowed maximum temperature range; according to the recorded thermoelectric potential difference and the corresponding temperature , it can be judged that the detection of the thermocouple out of tolerance is unacceptable.