Perform pre-test and post-test calibration of non-Isokinetic low flow (VOST, Methods 6 and 26) meter boxes immediately, on-site and at test conditions. Alleviate the problems arising from transport of the metering console between test and calibration locations that jeopardize test results. Each critical orifice set contains three calibrated precision orifices (0.5, 1.0 and 2.0 LPM nominal flow rates) attached to ¼ in. quick connect stems in brass or stainless steel, a dry gas meter calibration spreadsheet diskette, recording logs, orifice set calibration report, and a dust-proof, foam-lined carrying case. Using the appropriate orifice to approximate the expected flow rate, time five running revolutions of the dry gas meter and input the data into the spreadsheet to calculate the gas meter calibration factor.
Environmental Supply Company. 2142 East Geer St., Durham, NC 27704. Contact Chris Dale at: 919-956-9688 or 800-STACKS-5 (782-2575); FAX: 919-82-0333