ABSTRACT
This chapter deals with the complex process of preparing and calibrating equipment for an emissions test. Prior to use, an extensive amount of equipment calibration is necessary. The sampling nozzle diameter must be accurately measured; the pitot tube must be calibrated; the dry gas meter and the orifice meter must be calibrated; and the heater controls, temperature sensors, and pressure measuring devices must all be calibrated. The chapter discusses the process for calibration of the dry gas meter and orifice meter. The dry gas meter and orifice meter are calibrated against a calibrated wet test meter. The ultimate objective of any air pollutant emissions test is an accurate and defensible evaluation of the source's particulate emission rate in the same units as the pertinent regulation. Raw data to be measured for any pollutant emission quantification include: gas flow rate and velocity, molecular weight, moisture, temperature and pressure, gas sample volume, stack or duct cross-section, and mass of pollutant collected.
