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中控卡件压力信号异常是何原因?

2020-10-08 11:51:21 来源:http://www.sdjkyqyb.com/ 53

  中控卡件压力信号异常是何原因?
  What is the cause of abnormal pressure signal of central control card?
  A:压力信号出现满量程情况,与实际不符。断开卡件后面的信号线正极,信号由满量程变仍有8公斤左右压力信号(量程为0-13公斤)。经现场观察,该测点经过安全栅。将信号线短路,不过安全栅后,信号显示正常。
  A: The pressure signal is in full range, which is inconsistent with the actual situation. Disconnect the positive pole of the signal line behind the card, and the signal changes from full scale to about 8kg pressure signal (the range is 0-13kg). Through field observation, the measuring point passes through the safety barrier. Short circuit the signal line, but after the safety barrier, the signal display is normal.
  初步判断是安全栅出现问题。原因可能是同一组的信号,安全栅是共地的。当安全栅故障后,另一毫安信号耦合到该信号上来,造成信号的干扰。
  The preliminary judgment is that there is a problem with the safety barrier. The reason may be the same group of signals, the safety barrier is common ground. When the safety barrier fails, another Ma signal is coupled to the signal, causing signal interference.
              浙大中控
  热电阻信号不准如何排查?
  How to check if the thermal resistance signal is inaccurate?
  A:首先,检查热电阻的组态,确认了组态中的热电阻型号和实际的型号保持一致;其次,确保上下位机组态一致。然后,如果还是怀疑测温有问题的话,可以测量现场热电阻A和B之间的阻值为R1;B和C之间的阻值为R2。
  A: First of all, check the configuration of the thermal resistor to confirm that the model of the thermal resistor in the configuration is consistent with the actual model; secondly, ensure that the configuration of the upper and lower computer is consistent. Then, if it is still suspected that there is something wrong with the temperature measurement, the resistance between a and B can be measured as R1; the resistance between B and C is R2.
  根据3线制热电阻的测温原理,可以得到热电阻的实际电阻值为R1-2R2。然后查表找出对应的温度。然后用这个温度和监控上的温度再进行比较。如果出入较大,请更换卡件后再次尝试。
  According to the temperature measurement principle of 3-wire thermistor, the actual resistance value of thermal resistor is r1-2r2. Then look up the table to find the corresponding temperature. Then compare it with the temperature on the monitor. If the difference is large, please replace the card and try again.
  以上是关于中控卡件压力信号异常原因的分析排查介绍,希望能够帮助到大家,如您还有其他疑问欢迎咨询我们的网站。
  The above is about the analysis and troubleshooting of abnormal pressure signal of the central control card. I hope it can help you. If you have other questions, please consult our website.
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