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压力变送器信号不稳定常见原因及解决方法

作者: 来源: 日期:2018-9-21 10:36:10 人气:163

信号不稳的原因有以下几种

A.压力源本身是一个不稳定的压力

B.仪表或压力钱汇娱乐抗干扰能力不强

C.钱汇娱乐接线不牢

D.钱汇娱乐本身振动很厉害

E. 钱汇娱乐故障

解决方法:

1、被测压力加上去,但压力变送器输出信号上不去:

先应检查压力变送器的取压接口是否漏气或者被堵住,如果确认不是

可检查压力变送器的接线方式,如接线无误

检查电源,如电源正常

查看压力钱汇娱乐零位是否有输出,或者进行简单加压看输出是否变化,有变化证明压力变送器没有损坏,如果无变化钱汇娱乐即已经损坏。

出现这种情况的其他原因还可能是仪表损坏,或者整个系统的其他环节的问题。

2、加压变送器输出不变化,再加压变送器输出突然变化,泄压变送器零位回不去。

此现象的原因极有可能是压力钱汇娱乐密封圈引起的,一般是因为密封圈规格原因(太软或太厚),压力变送器拧紧时,密封圈被压缩到钱汇娱乐引压口里面堵塞钱汇娱乐,加压时压力介质进不去,但是压力很大时突然冲开密封圈,压力钱汇娱乐受到压力而变化,而压力再次降低时,密封圈又回位堵住引压口,残存的压力释放不出,因此钱汇娱乐零位又下不来。

排除此原因的最佳方法是将钱汇娱乐卸下,直接察看零位是否正常,如果正常更换密封圈再试。

 There are several reasons for this instability.

A. pressure source itself is an unstable pressure.

B. instrument or pressure sensor is not strong enough to resist interference.

C. sensor wiring is not fast enough.

The D. sensor itself is very vibrant.

E. sensor failure

Resolvent:

1. The measured pressure is added, but the output signal of the pressure transmitter is not going up.

Check whether the pressure interface of the pressure transmitter is leak or blocked, if confirmed.

Check the connection mode of the pressure transmitter, such as wiring error.

Check the power supply, such as normal power supply.

Check whether the pressure sensor zero output, or simply pressurize to see if the output changes, changes prove that the pressure transmitter is not damaged, if there is no change in the sensor has been damaged.

Other reasons for this may be instrumentation damage, or other aspects of the system as a whole.

2. The output of pressure transmitter remains unchanged, and then the output of pressure transmitter suddenly changes, so the zero position of pressure relief transmitter can not be returned.

This phenomenon is most likely caused by the pressure sensor sealing ring, usually because of the sealing ring specifications (too soft or too thick), pressure transmitter tightening, the sealing ring is compressed into the sensor inlet plugging sensor, pressure medium can not go in, but the pressure is very high when suddenly burst open the sealing ring, The pressure sensor is changed by pressure, and when the pressure decreases again, the sealing ring returns to plug the suction port, and the residual pressure can not be released, so the sensor zero position can not come down.

The best way to eliminate this is to remove the sensor and check the zero position directly to see if it is normal. If the seal ring is replaced properly, try again.

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