IEST publishes contamination control RPs on calibration

Published: 30-Nov-2006


Two Recommended Practices (RPs) covering calibration procedures are now available from the Institute of Environmental Sciences and Technology (IEST).

Published by the Contamination Control Division, the documents are IEST-RP-CC013.2: 'Calibration Procedures and Guidelines for Select Equipment Used in Testing Cleanrooms and Other Controlled Environments' and IEST-RP-CC014.1: 'Calibration and Characterisation of Optical Airborne Particle Counters'.

The former outlines procedures for calibrating and verifying equipment used in characterising cleanrooms and for determining intervals of calibration. The updated document includes general procedures for calibrating photometers, aerosol generators, and anemometers.

IEST-RP-CC014.1, the first edition of a new RP, provides standardised test methods to calibrate and characterise the performance of optical particle counters used to define airborne particle size distribution and concentrations in air and other gases. The RP defines procedures for inlet flow rate, sizing calibration, zero count, counting efficiency, concentration (coincidence) limit, and resolution.

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