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| Calibration Samples
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Whitehouse Scientific calibration samples are microspheres formed of soda-lime glass that range from 3.35 mm down to 20 µm sizes. Thanks to the precise nature and extent of the range of spheres, samples can be supplied to enable the accurate calibration of individual sieves.
These Calibration Samples;
Are Traceable to NIST.
Being spherical the use of calibration samples gives extremely accurate results.
Enable the calibration of a test sieves to an accuracy of approximately 1 µm.
Pass over virtually the total surface of the sieve (aprroximately 80%) Thus more apertures are examined than with any other method assuring repeatabliity.
Are calibrated by Whitehouse Scientific, who is recognized as the leading particle analysis laboratories in the World.
Accurately calibrate test sieves in a matter of minutes.
To perform a calibration:
Select the calibration sample size that matches the aperture size of the sieve.
Weigh the Sieve to be tested and a receiver pan and tare out this weight.
Place the 'Single Shot' sample on the sieve with a recieve pan attached and record weight
Shake the sample for 2 minutes.
Enpty the receiver
Weigh the sieve and receiver and record the weight retained on the sieve.
From the retained weight calculate the percentage of sample that passed through.
use the calibration graph supplied with the test certificate to determine the mean aperture size.
Each sample is supplied with a Certificate of Analysis that is traceable to NIST.
Each item includes five bottles of the standard. A bottle contains enough material to calibrate one 8 inch or one 200 mm sieve.
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