Typical Fault Diagnosis and Processing of Electromagnetic Flowmeter?Xi'an Huaheng Instrument for you to introduce:

 

　　1.電磁流量計無流量輸出。檢查電源部分是否存在故障，測試電源電壓是否正常；測試保險絲通斷；檢查傳感器箭頭是否與流體流向一致，如不一致調換傳感器安裝方向；檢查傳感器是否充滿流體，如沒有充滿流體，更換管道或垂直安裝。

 

　　1.Electromagnetic flowmeter has no flow output.Check whether there is a fault in the power supply,test whether the power supply voltage is normal;test whether the fuse is on and off;check whether the arrow of the sensor is consistent with the flow direction of the fluid,such as inconsistent changing the direction of the sensor installation;check whether the sensor is full of fluid,such as not full of fluid,replace the pipeline or install vertically.

 

　　2.電磁流量計信號越來越小或突然下降。測試兩電極間絕緣是否破壞或被短路，兩電極間電阻值正常在(70～100)Ω之間；測量管內壁可能沉積污垢，應清洗和擦拭電極，切勿劃傷內襯。測量管襯里是否破壞，如破壞應予以更換。

 

　　2.The signal of electromagnetic flowmeter becomes smaller and smaller or drops suddenly.To test whether the insulation between the two electrodes is damaged or short-circuited,the resistance between the two electrodes is between(70-100)_.The inner wall of the measuring tube may deposit dirt.The electrodes should be cleaned and wiped,and the inner lining should not be scratched.Measuring pipe lining is damaged,if damaged,it should be replaced.

 

　　3.電磁流量計零點不穩(wěn)定時，檢查介質是否充滿測量管及介質中是否存在氣泡，如有氣泡可在上游加裝消氣器，如水平安裝可改成垂直安裝；檢查儀表接地是否完好，如不好，應進行三級接地(接地電阻≤100Ω)；檢查介質電導率應不小于5μs/cm；檢查介質是否淤積于測量管中，清除時注意不要將內襯劃傷。

 

　　3.When the zero of the electromagnetic flowmeter is unstable,check whether the medium is full of measuring tubes and whether there are bubbles in the medium.If there are bubbles,the gas eliminator can be installed upstream,and if it is installed horizontally,it can be installed vertically.If the instrument is not well grounded,it should be grounded at three levels(grounding resistance is less than 100_).Check the conductivity of the medium should not be less than 5 micros/cm;Check whether the medium is silted in the measurement.In the measuring tube,be careful not to scratch the lining when cleaning.

 

　　4.電磁流量計的流量指示值與實際值不符。檢查傳感器中的流體是否充滿管，有無氣泡，如有氣泡可在上游加裝消氣器；檢查各接地情況是否良好；檢查流量計上游是否有閥，如有，移至下游或使之全開；檢查轉換器量程設定是否正確，如不對，重新設定正確量程。

 

　　4.The flow indication value of electromagnetic flowmeter is not consistent with the actual value.Check whether the fluid in the sensor is full of pipes,whether there are bubbles,if there are bubbles,the gas eliminator can be installed upstream;check whether the grounding condition is good;check whether there are valves upstream of the flowmeter,if there are,move downstream or make it fully open;check whether the range setting of the converter is correct,if not,reset the correct range.

 

　　5.電磁流量計的示值在某一區(qū)間波動。檢查環(huán)境條件是否發(fā)生變化，如出現(xiàn)新干擾源及其他影響儀表正常工作的磁源或震動等，應及時清除干擾或將流量計移位；檢查測試信號電纜，用絕緣膠帶進行端部處理，使導線、內屏蔽層、外屏蔽層、殼體之間不相互接觸。

 

　　5.The indication of electromagnetic flowmeter fluctuates in a certain range.Check whether the environmental conditions have changed,such as the emergence of new interference sources and other magnetic sources or vibrations that affect the normal operation of the instrument,the interference should be removed or the flowmeter should be shifted in time;check the test signal cables,and use insulating tape for end treatment,so that the conductor,the inner shield layer,the outer shield layer and the shell do not contact each other.

 

　　選用電磁流量計測量流量的流體必須是導電的，因此不導電的氣體、蒸汽、油類、丙銅等物質不能選用電磁流量計測量流量。

 

　　Electromagnetic flowmeter must be electrically conductive to measure flow.Therefore,non-conductive gases,steam,oil,copper propylene and other substances can not use electromagnetic flowmeter to measure flow.

 

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