The Fundamentals of the Air Sampler Calibration-Verification Process

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Courtesy of F&J SPECIALTY PRODUCTS, INC.

INTRODUCTION

The calibration of an air sampling instrument using a reference air flow calibrator requires attention to scientific detail in order to establish that the instrument’s reported values are correctly stated and valid under the actual operating conditions of the air sampling instrument.

DEFINITIONS

For the purposes of this paper, the following definitions shall apply:

Gas of Interest: Air

Indicated Flow (Find): The uncorrected volumetric air flow measured at the flow sensor under the actual conditions of temperature and pressure existing at the flow sensor after air circuitry line losses, pressure drop across the filters and dust loading conditions, if pertinent

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