The fisher sub sieve sizer rack and pinion shall be properly aligned vertically with the chart.
What is requirement on the rack and pinion according to ASTM B330 Standard Test Method for Fisher Number of Metal Powders and Related Compounds using a fisher sub sieve sizer?
What is the principle of a hall flow meter funnel according to international standard ISO 4490 Metallic powders – Determination of flow rate by means of a calibrated funnel (Hall Flowmeter)?
Measurement of the time required for 50 g of a metallic powder to flow through the orifice of a calibrated funnel of standardized dimensions.
What to do if the scatter between results exceeds 1% of the mean according to ISO 3923-2 Metalllic powders – Determination of apparent density – Part 2: Scott volumeter method?
The apparent density is given by the formula.Report the arithmetical mean of three determinations to the nearest 0.01 g/cm3,and the highest and the lowest results if the scatter between results exceeds 1% of the mean.
Why how the determination is made is essential accroding to USP 616 Bulk Density and Tapped Density of Powders using a tap density tester?
The bulk density of a powder is often very difficult to measure with good reproducibility and ,in reporting the results,it is essential to specify how the determination was made.
What is requirement on the calibrator chart according to ASTM B330 Standard Test Method for Fisher Number of Metal Powders and Related Compounds using a fisher sub sieve sizer?
Before proceeding with standardization of the Fisher Sub Sieve Sizer,the following items shall be checked:The chart shall be properly aligned horizontally with the indicator pointer.
What is the application of hall flowmeter method according to international standard ISO 4490 Metallic powders – Determination of flow rate by means of a calibrated funnel (Hall Flowmeter)?
The method is applicable only to powders which flow freely through the specified test orifice.
How many test portions is required during determining the apparent density of powder according to ISO 3923-2 Metalllic powders – Determination of apparent density – Part 2: Scott volumeter method?
Carry out the determinations on three test portions.
What affect the bulk density accroding to USP 616 Bulk Density and Tapped Density of Powders using a tap density tester?
The bulking properties of a powder are dependent upon the preparation,treatment,and storage of the sample,i.e.how it was handled.The slightest disturbance of the powder bed may result in a changed bulk density.
What is the requirement on the balance used in fisher number test by a fisher sub sieve sizer according to ASTM B330 Standard Test Method for Fisher Number of Metal Powders and Related Compounds?
The balance has a capacity of at least 50 g and a sensitivity of 0.001 g.
Fisher Sub Sieve Sizer
What is the scope of international standard ISO 4490 Metallic powders – Determination of flow rate by means of a calibrated funnel (Hall Flowmeter)?
This international Standard specifies a method for determining the flow rate of metallic powders, including powders for hardmetals,by means of a calibrated funnel (Hall Flowmeter).



