Navigating Test Sieve Varieties: Matched, Master, and Gold-Certified
Unpacking Matched Test Sieves
Matched test sieves aim to replicate analysis results achieved with master test sieves, under specific material parameters. Importantly, the production of matched test sieves is not governed by ISO or ASTM standards, making them particularly adaptable.
Deciphering Master Test Sieves
Master test sieves, resembling working sieve stacks, serve the sole purpose of evaluating the accuracy of the test sieve analysis process. Similar to matched test sieves, there are no industry-established standards that mandate the use of master test sieves.
Understanding Gold Test Sieves
Gold test sieves employ wire mesh screens meticulously woven to ensure that, on average, mesh openings align with ASTM or ISO s tandards within a 50% tolerance range.
Understanding Gold Test Sieves
- Matched test sieves are typically available in 8-in ch diameter sieves, with mesh counts spanning USA No. #8 to #325.
- Gold-certified test sieves also come in 8-inch diameter sieves but encompass a mesh count range from USA No. 20 to 500.
- Master test sieves, essentially standard test sieves, can be obtained with the same specifications as typical daily use sieves.
- The primary differences between matched, master, and gold test sieves revolve around mesh precision and size range.
In terms of accuracy, matched test sieves must deliver results within +/- 2.5% of those obtained using the sieve provider's master test sieves. Gold-certified test sieves must maintain an average mesh opening within a 50% tolerance of in dustry-defined mesh sizes.
Selecting the Right Sieve for Your Lab
The choice of test sieves largely depends on the desired testing outcomes.
- Matched test sieves are suitable for larger corporations aiming for consistent results across multiple testing sites.
- Gold-certified test sieves prove advantageous in highly regulated sectors like pharmaceuticals, ensuring material compliance with industry standards.
Certification Bolsters Precision
While matched, master, and gold-certified test sieves offer heightened accuracy, it's advisable to certify your everyday working sieves every 6 to 36 months, depending on usage. This practice further reinforces the precision of your test sieve analysis process, ensuring reliable adherence to industry standards.
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