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Test Sieve Certification & Re-Certification

Be Certain Your Test Sieves Measure Up!

  • Today’s Test Sieves are digitally inspected; openings are measured with a computer aided optical video imaging system linked to custom statistical software.
  • Measurement system is regularly calibrated to NIST traceable standards.
  • Test Sieves can be supplied certified or re-certified to ASTM E11 or ISO 3310 Specifications.
  • Certification and Re-Certification reporting is presented graphically in a Histogram.  Certification also includes statistical summary information.
  • Each Test Sieve is identified with a serial number and supplied with NIST traceable documentation.
  • Each Test Sieve is individually boxed.

ASTM E11 Test Sieves now manufactured to
(3) different confidence levels.

Compliance Test Sieve – supplied to a confidence level of 66%, means that the sieve cloth used in this test sieve was inspected prior to being mounted in the sieve frame; and that it meets the requirements as outlined in Table 1, Column 7 of the ASTM E11 Specification. 

A Certificate of Compliance is included with the Test Sieve when it is shipped.  There is no statistical documentation supplied with a Compliance Test Sieve.     

 

Inspection Test Sieve – supplied to a confidence level of 99%, means that the sieve cloth used in this test sieve was inspected and measured after being mounted in the sieve frame; and that it meets the requirements as outlined in Table 1, Column 9 of the ASTM E11 Specification. 

The documentation certificate for an Inspection Test Sieve includes (at a minimum) the average opening size when measured in both the warp and shute direction of the sieve cloth.

 
 

Calibration Test Sieve - supplied to a confidence level of 99.73%, means that the sieve cloth used in this test sieve was inspected and measured after being mounted in the sieve frame; and that it meets the requirements as outlined in Table 1, Column 11 of the ASTM E11 Specification. 

Calibration Test Sieves have at a minimum (for test sieves with a 3/4” opening and smaller) twice as many openings measured as Inspection Test Sieves.  For US Std #400 and finer three times as many openings are measured than the Inspection Test Sieves. 

 
 

The documentation certificate for an Calibration Test Sieve includes (at a minimum) the number of openings and wire diameters measured, the average opening size and average wire diameter when measured in both the warp and shute direction of the sieve cloth, and the standard deviation.