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温度仪表出现故障如何排除大家知道吗?

发布时间:2020-04-11 11:11:25   发布人:
  当温度仪表出现故障时,在进行故障判断之前,首先要注意一个问题,即系统中使用的温度仪表是否采用电气仪表对温度进行测量、指示和控制。如果答案是肯定的,则意味着系统仪表的测量存在一定的滞后。
  When there is a fault in the temperature instrument, before judging the fault, we should first pay attention to a problem, that is, whether the temperature instrument used in the system uses electrical instruments to measure, indicate and control the temperature. If the answer is yes, it means that there is a certain lag in the measurement of the system instrument.
  温度仪表系统一般不出现极限指示值,所以一旦出现或温度值,一般可以判断为温度仪表系统故障。温度仪表系统很少发生突发性的变化,这是由于系统本身的滞后造成的,所以突发性的温度变化主要是热电偶、热电阻、补偿导线断丝或发射机功放故障。
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  Temperature instrument system generally does not have limit indication value, so once the maximum or minimum temperature value occurs, it can be generally judged as temperature instrument system fault. The temperature instrument system seldom changes suddenly, which is caused by the lag of the system itself, so the sudden temperature changes are mainly thermocouple, thermal resistance, compensation wire broken or transmitter power amplifier failure.
  温度表在使用中如果温度值过快振动,大多数控制参数PID调节不当。如果温度仪表出现缓慢波动,其原因主要是工艺操作问题,如果消除了工艺操作原因,则温度仪表失效。
  If the temperature value of the thermometer vibrates too fast in use, most of the control parameters PID are not adjusted properly. If the temperature instrument fluctuates slowly, the main reason is the process operation. If the process operation reason is eliminated, the temperature instrument fails.
  温度仪表系统本身的普遍特点是没有改变控制信号,根据控制信号可以判断故障,不变,调节阀电影头隔膜阀输入信号发生泄漏,阀门定位器信号故障定位器本身不变,系统控制器输出信号故障是监管机构本身。
  The common feature of the temperature instrument system itself is that the control signal has not been changed. According to the control signal, the fault can be judged, which is constant. The input signal of the diaphragm valve of the control valve diaphragm head leaks, the signal fault of the valve positioner itself does not change, and the output signal fault of the system controller is the regulator itself.
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