The reasons for the unsteady electromagnetic flow meter scale to zero and their solutions

Abstract: the reasons for the unsteady electromagnetic flowmeter scale to zero and their solutions of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Check the zero electromagnetic flowmeter unstable process. First according to the process steps of comprehensive thinking as early check and discrimination, and then carefully check item by item and try cleaning problems. Process check project phase of the criterion is listed by viewing or interrogate comprehends to operation. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the reasons for the unsteady electromagnetic flowmeter scale to zero and their solutions the article details. Check the zero electromagnetic flowmeter unstable process. First according to the process steps of comprehensive thinking as early check and discrimination, and then carefully check item by item and try cleaning problems. Process check project phase of the criterion is listed by viewing or interrogation comprehends to action in the former, namely after the first difficult according to the on-site maintenance experience in the past, present high frequency and the probability may be present high successively request in check before their own. If is confirmed by the pace at the beginning to check after several fault reason, can also be a detailed check ahead of time. Pipe is not filled with liquid or liquid containing bubbles objectively think there is no activity within a flow sensor and practice there is a trace. This kind of problem is the main reason the line of valve closure, electromagnetic flowmeter is detected by the tiny amount of leakage, misunderstanding of zero change or zero is not stable. Apply day long or liquid dirty make the valve sealing is not complete case is often encountered, large valve so special. Another popular reason is there are a number of branch pipe flow meter in addition to the main line, forget or neglect these branch valve shut off. Have to confirm there is no activity piping at the scene also difficult. According to examine whether have leakage quantity at this time. In static liquid conductivity changes or uneven make zero changes, shook the output activities. Meter position should be far away from the injection point or pipe chemical solution should be section downstream, upstream flow sensor zui in these places. If liquid containing solid phase, or impurities accumulated flow metering tube inner surface, or on the inner wall of the tube flow measurement scale, or electrode by grease filth and so on, could render the zero change. Due to internal appearance of scaling and electrode filthy level impossible to complete the same and symmetrical, destroy the balance of the initial zero setting. Positive measures to eliminate filth and heap fouling layer; If zero little change can also try to zero. The change of flow sensor full power equipment state ( Such as leakage current increase) A grounding potential change, also can make up the electromagnetic flowmeter zero change. Pipeline stray current interference effects such as mainly by electromagnetic flowmeter good ground maintenance, usually request grounding resistance is less than 10, don't share the grounding and other electrical appliances. Have better environmental conditions, in electromagnetic flowmeter earthing can not work normally, but once good environment does not exist, the instrument can present problem, then checked again can bring a lot of trouble. Check the flow chart. Unstable signal circuit insulation landing would amount to a zero. Signal circuit insulation landing electrode parts is the main reason the landing have provoked, but also can't sweep signal cable and terminal insulation landing or destroyed, because there are at the scene environment is very cruel, a little careless at an overlook meter cover, wires connecting sealing, permeated with the moisture acid mist or powder dust intrusion meter connector or cable layer maintenance, landed the insulation. Signal circuit insulation resistance check respectively according to the cable side and two local stop flow sensor, with a megger test. Due to the signal cable easy detection can be done first. Filled with liquid electromagnetic flow after measuring electrode surface contact resistance and air traffic flow measuring electrode insulation resistance. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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