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What is the working principle of an electromagnetic flowmeter?
2. May I ask how to reset the cumulative flow of the Yokogawa electromagnetic flowmeter to zero? Hello, there are three buttons at the bottom of the Yokogawa electromagnetic flowmeter head: set/shift/inc. Press set to enter the setting, shift to select the item, and inc to modify the value. The LCD screen shows E4: 00, change to 01, which allows setting the cumulative value. Press set twice to save; Then enter E5:, change to E5:000, this is the reset setting value, 000 is reset, press set twice to save. Press and hold Shift for 2 seconds to reset the accumulated value to zero. 3. What are the accuracy levels 
Accuracy levels of electromagnetic flow meters
Level 1.0.5: the highest accuracy, generally used in situations where high fluid flow measurement requirements are needed
Level 2.1: second highest accuracy, suitable for general flow measurement situations
Level 3.1.5: lower accuracy, suitable for some less demanding flow measurement situations
Level 4.2: the lowest accuracy, generally used in situations where low flow measurement requirements are needed.
. Electromagnetic flowmeters (EMF) are a new type of flow measurement instrument that rapidly developed in the 1950s and 1960s with the advancement of electronic technology.