For accurate test sieve calibration
How to accurately calibrate test sieves in a matter of
1. Select the calibration sample size that matches the aperture
size of the sieve.
2. Place a weighed sample on the sieve under test and shake for
3.Weigh the sample again and calculate the percentage passing
through the sieve.
4. Simply read off the percentage passing along the graph
supplied with every Calibration Sample.
5.....read the mean average aperture size in microns can be read
off here against the graph.
What are calibration samples?
Endecotts calibration samples are microspheres formed of
soda-lime glass that range from 3.35 mm down to 20 micron sizes.
Because of the precise nature and extent of the range of spheres,
samples can be supplied to enable the accurate calibration of
individual sieves to an accuracy of approx 1µm.
The microspheres pass over, almost, the total surface of the sieve
enabling more apertures to be examined than with any other
method. Consequently, calibration samples are one of the most
accurate methods of sieve calibration available.
Endecotts glass microspheres are calibrated by an external
laboratory who are recognised as one of the leading particle
analysis laboratories by the BCR, and by 20 other leading European
particle size analysis laboratories.
See Specification; The Table lists the nominal aperture size of a
specific sieve and the approximate Calibration Sample required
Calibration Samples are supplied on 'Single Use' vials complete
with calibration certificate