Liquid level control instrumentation system fault analysis

Posted by igeelee on May 8th, 2019

(1) Liquid level control When the instrumentation system indicator value changes to the maximum or minimum, you can check whether the instrumentation is normal. hose crimping tool. If the indication is normal, change the liquid level control to the manual remote control level to see the liquid level change. If the liquid level can be stabilized within a certain range, the fault is in the liquid level control system; if the liquid level is stable, it is generally the fault caused by the process system, and the cause should be found from the process.

(2) When the differential pressure type liquid level control instrument indication and the on-site direct-reading indication instrument are inconsistent, first check whether the on-site direct-reading indicator is normal. If the indication is normal, check the negative pressure of the differential pressure level instrument. Whether there is leakage in the pressure-sealing tube sealing liquid; if there is leakage, re-filling liquid, zero adjustment; no leakage, the negative migration of the meter may be wrong, and the migration amount is re-adjusted so that the instrument indicator is normal.

(3) Liquid level control When the indication value of the instrumentation system changes frequently, the capacity of the liquid level control object should be analyzed first to analyze the cause of the fault. The large capacity is generally caused by the instrument fault. When the capacity is small, it is necessary to analyze whether the process operation has changed. If there is a change, it is likely that the process causes frequent fluctuations. If there is no change, it may be caused by instrument failure.