Re-Certify Your Sieves
Test Sieve Re-Certification
Periodic Certification (Inspection or Calibration grade) of test sieves is recommended as with any precision laboratory instruments. Generally, the finer woven wire cloth requires more frequent inspections. Re-Certification schedules greatly depend upon your media, frequency of usage, sieve handling and care, and your internal quality system requirements.
What should I do before sending in my test sieve for Recertification/Calibration?
W.S. Tyler requires the following items be included in the packaging for each of your test sieve recertification orders:
- RMA Number Must be clearly written on the box (Can be obtained through customer service department): request an RMA
- Purchase Order – copy included in the box
- SDS documentation for the material that has been tested on the test sieves
- Test Sieves must be clean and free of debris when received.
Contact us if you have any questions.
Certification Grade Levels:
- 200C – INSPECTION: Certificate contains inspection data from a percentage of apertures measured based on the ASTM E-11 standards table providing a confidence level of 99.0% that each sieve is within the specifications.
- 300C – CALIBRATION: Certificate data contains at least twice as many apertures measured than “Inspection” grade sieves, thereby providing the highest confidence level available of 99.73%.
Re-Certification Schedule:
Refer to the table below for the recommended schedule. Also above are instructions on how to submit your sieve for re-certification.
|
US Standard Sieve Designation No. |
Number of Uses |
or |
Months in Use |
|
5” to ¼” |
80 |
36 |
|
|
#3.5 to #12 |
70 |
30 |
|
|
#14 to #40 |
60 |
24 |
|
|
#45 to #140 |
50 |
18 |
|
|
#170 to #325 |
35 |
12 |
|
|
#400 to #635 |
20 |
6 |