液位控制仪表系统 应该注意以下几个方面： The following aspects should be noted when using the liquid level control instrument system :
液位控制仪表系统 指示值有不正常变化的情况下： 1. In the case of abnormal changes in the indication value of the liquid level control instrument system :
a. First check whether the instrument is running normally. If the indication is normal, change the liquid level control to manual remote liquid level to see the liquid level change;
b. If the liquid level can be stabilized within a certain range, then the fault occurs inside the liquid level control system ;
c. If the range of the liquid level cannot be stabilized, most of them are caused by the failure of the process system, so the cause of the problem should be found from the process side.
液位控制仪表系统 指示值变化出现了波动频繁： 2. The indication value of the liquid level control instrument system changes frequently:
To analyze the cause of the fault by analyzing the capacity range of the liquid level control object: most of the capacity is caused by the failure of the instrument; the small capacity is to analyze whether the process operation has changed, and the change may be caused by the process; if there is no change It may be caused by a malfunction of the instrument.
差压式液位控制仪表的指示和现场指示仪表指示对不上的时，先检查现场直读式指示仪表是不是正常，如指示正常的情况下，检查差压式液位仪表的负压导压管封液是否有渗漏，如有渗漏，重新灌封液，调至零点，如无渗漏，可能是仪表的负迁移量出现问题，因此需要重新调整迁移量使仪表指示显示正常。 3. When the indication of the differential pressure level control instrument and the on-site indication instrument are not compatible, first check whether the on-site direct-reading indication instrument is normal. If the indication is normal, check the negative pressure of the differential pressure level instrument. Check if there is leakage in the pressure sealing tube. If there is leakage, refill the sealing liquid and adjust it to zero. If there is no leakage, there may be a problem with the negative migration of the meter. Therefore, the migration amount needs to be adjusted to make the indicator display normal.