303-39 How to maintain the funnel of hall flowmeter? What is the necessity of purchasing standard sample?

303-39 How to maintain the funnel of hall flowmeter? What is the necessity of purchasing standard sample?

The funnel should be checked with standard sample regularly during use. If the flow time of the standard sample in the funnel changes, the new correction coefficient should be calculated from the newly measured time averge.

AS-300 Hall Flowmeter︱Flow Meter Funnel︱Metal Powder Flow Rate︱Apparent Density︱Carney︱Manufacturer