在使用前需要電磁流量計(jì)是正常運(yùn)轉(zhuǎn)的。平時(shí)查看的辦法通常有在線查看和離線查看兩種，主要是驗(yàn)證電磁流量計(jì)的流量丈量值是不是符兼并堅(jiān)持預(yù)期的計(jì)量要求。

Before use, the electromagnetic flowmeter should be in normal operation. Usually, there are two ways to check whether the flow measurement value of electromagnetic flowmeter meets and adheres to the expected measurement requirements.

電磁流量計(jì)測(cè)流體多具有腐蝕性和磨耗性。實(shí)踐應(yīng)用中，電磁流量計(jì)發(fā)作的故障多是因?yàn)楦g走漏、絕緣降低、電極玷污或附著異物而導(dǎo)致。

The fluid measured by electromagnetic flowmeter is corrosive and abrasive. In practical application, the faults of electromagnetic flowmeter are mostly caused by corrosion leakage, insulation reduction, electrode contamination or foreign matters.

電磁流量計(jì)傳統(tǒng)的定時(shí)保護(hù)查看是將流量傳感器卸下管線打掃和查看，然后施行流量校準(zhǔn)。為減少流量傳感器從管道上卸裝損害面料，先在管線上丈量絕緣電阻等揣度有無(wú)異常現(xiàn)象，再?zèng)Q議下一步是不是卸下管線查看或?qū)嵙髁髁啃?zhǔn)。通常有條件的(貫徹ISO9001質(zhì)量管理體系)公司大致查看辦法為：

The traditional timing protection inspection of electromagnetic flowmeter is to remove the flow sensor, clean and check the pipeline, and then carry out flow calibration. In order to reduce the damage to the fabric when the flow sensor is unloaded from the pipeline, first measure the insulation resistance on the pipeline to guess whether there is any abnormal phenomenon, and then decide whether to remove the pipeline for inspection or real flow flow calibration. Generally, the general inspection methods of qualified (implementing ISO9001 quality management system) companies are as follows:

(1)、1/3只作在線查看；

(1) 1 / 3 for online viewing only;

(2)、1/3卸下管線做接液部位打掃后查看；

(2) 1 / 3 of the pipeline was removed to clean the liquid receiving part and then checked;

(3)、1/3離線作流量校準(zhǔn)。

(3) 1 / 3 off-line for flow calibration.

一、具體操作辦法之一

1、 One of the specific operation methods

公司可對(duì)電磁流量計(jì)每年做一次全面查看。查看內(nèi)容為：外觀查看，轉(zhuǎn)換器特性實(shí)驗(yàn)，丈量值校準(zhǔn)，丈量各部電壓，丈量絕緣電阻，承認(rèn)電路等。外表查看調(diào)整時(shí)因零點(diǎn)漂移，調(diào)整零點(diǎn)顯得十分重要(“在線調(diào)零”有必要使被測(cè)介質(zhì)中止活動(dòng)，實(shí)踐不易辦到)。因而，在線查看通常省略包括有傳感器運(yùn)作的查看，而施行轉(zhuǎn)換器的校準(zhǔn)，以便將在線查看成果和歷史數(shù)據(jù)對(duì)比斷定外表是持續(xù)運(yùn)用、修補(bǔ)仍是更新，對(duì)傳感器則按所測(cè)勵(lì)磁線圈絕緣電阻劣化程度決議更新與否。

The company can check the electromagnetic flowmeter once a year. The contents are: appearance inspection, converter characteristic experiment, measurement value calibration, voltage measurement of each part, insulation resistance measurement, circuit recognition, etc. It is very important to adjust the zero point due to the zero point drift when checking and adjusting the surface. Therefore, online inspection usually omits the inspection of sensor operation, and performs the calibration of converter, so as to compare the online inspection results with historical data to determine whether the appearance is continuously used, repaired or updated, and whether the sensor is updated according to the measured insulation resistance deterioration degree of excitation coil.

二、具體操作辦法之二

2、 Specific operation method 2

經(jīng)過(guò)在線查看驗(yàn)證電磁流量計(jì)有無(wú)異?，F(xiàn)象。對(duì)不能中止介質(zhì)活動(dòng)的管線別離查看流量傳感器和轉(zhuǎn)換器，用模仿信號(hào)器和別的通用外表測(cè)驗(yàn)轉(zhuǎn)換器具有較高的校準(zhǔn)精確度(這取決于模仿信號(hào)器精確度)。

Check and verify whether the electromagnetic flowmeter has abnormal phenomenon through online inspection. For the pipeline which can not stop the medium activity, the flow sensor and converter can be checked separately. The analog signal device and other general appearance test converter have higher calibration accuracy (depending on the accuracy of the analog signal device).