Gilson's How to Set Up a Performance Test of Your Working Test Sieves скачать в хорошем качестве

Gilson's How to Set Up a Performance Test of Your Working Test Sieves

https://www.globalgilson.com/blog/tes... How to Set-up a Performance testing Schedule for Working Test Sieves Every testing lab operator wants their test sieves in service as long as possible, and that means those test sieves must continue to meet the applicable standards. Eventually though, wire cloth stretches and sags, tears occur, and abrasive materials reduces wire diameter. An in-house Performance testing Schedule for Working Test Sieves can help you identify when it’s time to replace your test sieve, and ensure consistency for multiple sieve sets, or part of a Quality Control/Quality Assurance program especially in gauging wear. Establish a Master Set The first step is to create a dedicated Master Reference Set of Inspection or Calibration test sieves. The Master Set will serve as the basis for a performance testing of working sieves. AND are not to be used as day-to-day operational test sieves. Following the recommendations for user-prepared materials in ASTM E2427, The Master Set is performance tested using a properly acquired representative sample or Standard Reference Materials. Results can then be compared to results from the same performance test on working sieves (within ±2.5% by weight) to determine the accuracy of the working sieve. Initiate a Comparative Schedule Establishing a routine testing schedule for working test sieves to the Master Set allows you to detect the point when the day-to-day Working Sieves no longer meet the specifications required, thereby preventing test results that are not accurate. Over time, continued checks will reveal increased variation from initial performance testing to the master sieve. Most quality control programs accept variations ranging from 1% to 3% from the master sieve. For example, the initial testing may show that the Working No.10 sieve deviated from the performance results of the Master No. 10 sieve by 1.5%, but over time that deviation increased to 3.5%, where you may decide the working sieve is no longer acceptable for use. Evaluate Your Sieve Performance Following accepted sample dividing practices, split a representative sample into equal portions, one or more portions for working sieves and one for the master sieves. Process one sample portion through the Master Set and record the results. Process the remaining portion(s) through the Working Sieve Set(s) and record those results. Be sure to identify each working test sieve by recording the serial number, size, and type of sieve. Compare the results of the working sieves to the master set. Record the variation and indicate whether the test sieve is good-to-go or needs replacing. Remember when evaluating the performance between sieve stacks, it’s important that the sieves are always evaluated together - as a complete stack. Be sure to record and reference the serial number of each sieve in the stack before any testing is done. Use Standard Reference Materials User-prepared materials are non-standard and therefore are not directly traceable to any source. Consequently, performance test results may be more difficult to duplicate and verify during re-evaluations. NIST traceable (traceable to NIST or European Community Bureau of Reference (BCR)) Standard Reference Material (SRMs) OR Whitehouse Sieve Standards are precisely sized glass beads or powders used to performance test sieves. Although relatively expensive, these reference materials can be an invaluable tool in your quality control toolbox. Your commitment to a quality control program with scheduled sieve performance testing will provide a reliable measure and record of a test sieve’s compliance to ASTM or ISO standards. For more information go to https://www.globalgilson.com/blog/tes... performance testing test sieves sizes / performance testing test sieves for sale / standard test sieves / aggregate testing sieves / testing sieves sizes / stainless steel test sieve / gilson sieves / test sieves manufacturers / fine test sieves / standard sieve / standard test sieves / aggregate testing sieves / testing sieves sizes / stainless steel test sieve