Electromagnetic flow meter scale zero the instability of the solution

Abstract: the electromagnetic flow meter scale zero unstable solution information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Electromagnetic flowmeter is one of today zui commonly used in industrial measurement meter, because the electromagnetic flowmeter has measurement is not affected by fluid density, viscosity, temperature, pressure and conductivity changes and the effect of novel converter choose excitation method, low power consumption, zero point stability,. More flow meter manufacturers choose model price quote you are welcome to inquire, here is unstable electromagnetic flowmeter scale zero solution article details. Electromagnetic flowmeter is one of today zui commonly used in industrial measurement meter, because the electromagnetic flowmeter has measurement is not affected by fluid density, viscosity, temperature, pressure and conductivity changes and the effect of novel converter choose excitation method, low power consumption, zero point stability, high precision. Flow scale of up to 150:1, such as advantages, but the use of more also can present problem, so small make up today to analyze the electromagnetic flowmeter zero five view cleaning methods of unsafe. See a, first clear view: look at the program zero point process of electromagnetic flowmeter is not safe. According to process all consider before start the investigation and discrimination, and then detailed item by item to see and try cleaning problems. Process view items listed mouth order successively principle is: ( 1) By investigation or inquiry shall not be obliged to larger operations in the former, namely after the first difficult; （ 2) According to the bag yesterday on-site maintenance experience, present high frequency and back may present high probability in the former; （ 3) See their own have requirements. Began to investigate it and, if the team after the foot several fault reason, can make detailed check in advance. 2, imperfect electromagnetic flowmeter sensor according to the ground by the stray current outside disturb, such as: pipeline stray current main electromagnetic flowmeter outstanding outside disturb effects such as ground maintenance, usually needs grounding resistance less than 1000, don't and he Shared grounding electric machines and appliances. Environment condition is good, sometimes not ground electromagnetic flowmeter can normal operation, but once outstanding environment does not exist, appearance can present problems, and then a view will bring much trouble. The change of the flow sensor adjacent power equipment status ( Such as leakage current add) Constitute a change at ground potential, electricity will cause electromagnetic flowmeter zero change. Three, the electromagnetic flowmeter liquid ( Such as liquid conductivity uniformity, electrode pollution question) The reason; Liquid conductivity change or uneven, the rest will make zero change, shook the output flow. Thus flowmeter bearing should be far away from the written solution point or pipe section downstream of the chemical reaction, flow sensor zui in upstream of the sites. If the liquid to solid, or impurity accumulation is measurement of pipe wall, or in the measurement of tube wall fouling, or electrode by grease filth and so on, all have maybe present zero change. Due to the lining of exterior scale and degree of filth and electrode may not completely the same and symmetrical, damage to the plant initial balance of die set. Active way enough to remove filth and heap fouling layer; If zero when change is not big also can test from the beginning to zero. Four, electromagnetic flowmeter signal circuit insulation to reduce. Unstable signal circuit insulation lower would amount to a zero. Signal circuit insulation to reduce soil to reason, as a result of decreased the insulation package extremely part, but also can't sweep signal cable and terminal insulation to reduce or damaged. Because sometimes the environment is very strict, a little at a ignore appearance cover/wire connecting sealing not careful, filled with humidity acid mist or powder dust intrusion appearance junction box or cable maintenance layer, insulating bligh. Signal circuit insulation resistance check according to the cable side and the flow sensor side two mail separation points, with a megger test. Because of the simple signal cable can do first. Flow sensor is divided into two: filled with liquid strider electrode surface touch resistance measurement and measurement after a tube, U insulation resistance. 5, check the electrode touching resistance and electrode insulation resistance in 2 steps. （ 1) Filled with liquid measurement electrode appearance spoon touch resistance flow sensor signal cable wiring, the multimeter measure each electrode separation and pick up address,, the resistance between two electrodes of geoelectric elder sister value should be left in the 10% to 20%. Section 9 'a/electrode touching resistance measurement will be further elucidated. （ 2) Atc measurement electrode insulation emptying measurement tube, wipe with dry cloth in appearance, after being thoroughly dry, use H500VDC megohmmeter measurement between the electrode and ground resistance, resistance must be in the 100 m & Omega; The above. Above is the five cleaning method of electromagnetic flowmeter check way, in case of trouble, after-sales, their skills can also test to check the correction, can be useful to the progress of the work efficiency, if you have more questions for electromagnetic flowmeter are looking forward to consulting. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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