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<br />c) Pitot tube testing shall be conducted at a flow rate representing the typical flow for the <br />meter (and, if operationally possible, at three different flows ranging from a minimum to <br />near maximum capacity flow). <br /> <br />d) The metering consultant shall perform the meter testing and calibration procedures <br /> <br /> <br />utilizing the meter characteristic curves (for example, the pressure drop vs. flow for a <br /> <br /> <br />Venturi meter) that have been obtained during previous meter calibration and <br /> <br /> <br />maintenance work. <br /> <br />e) During each quarterly site visit, the metering consultant shall ~nspect, assess and <br />document the condition of all metering equipment, including meter, gauges, indicators, <br />recorders, transmitters and other instrumentation, used in the measurement and recording <br />offlow rates and cumulative flow totals and shall document all operational problems with. <br />the calibration instruments and meters during the calibration process. Problems may <br />include air entrainment, leakage, flow disturbance and unstable meter readings. <br /> <br />f) Prior to each quarterly site visit, the metering consultant shall review prior calibration <br />records and reports for each meter to determine if previously-identified errors or <br />equipment deficiencies were corrected as previously recommended. <br /> <br />g) Each quarter, the metering consultant shall submit a final report (See Section 6) <br />containing all of the calibration results for each meter tested and calibrated during the. <br />quarter. The metering consultant's report shall include a narrative description of the . <br />work conducted on each meter and meter calibration reports for the individual metering <br />equipment. The quarterly report shall also address deficiencies that were not previously <br />corrected according to the reco~mendations made in the prior report. <br /> <br />5. Calibration Instruments <br /> <br />The instrument used for flow testing of the primary meter (Venturi) must'meet the <br />accuracy standards required by the American Water Works Association (A WW A), and be <br /> <br />20 <br /> <br />March] 1,2009 <br />