Environmental Science & Engineering Magazine May-June 2013

Page 35

May2013_ES&E_5_2010 13-05-29 9:42 PM Page 35

Water Metering

FPI Mag installation.

FPI Mag flow meter graphic.

bined half-day. This included pulling wiring from the sensor to the converter at the meter-reading station. • Meter performance and bi-directional capability. Accuracy was critical to meeting Geneva’s primary objective. The FPI Mag delivered on the accuracy requirements. Its streamlined sensor features multiple electrodes across the entire pipe diameter. Its highly stable profile

provides accuracy of ± .5% of reading, from 1 to 32 ft/sec velocity range. Additionally, the availability of the bidirectional model fit the city’s needs, allowing it to account for water regardless of the flow direction in the distribution system. • Startup and calibration assistance. Due to the absence of bulk metering, Geneva was unable to provide McCrom-

eter with confident flow ranges for the factory calibration. Consequently, it used its NIST-certified, full-flow test facility to calibrate the units to a reasonable maximum flow velocity for each pipe size, down to a minimum velocity reflecting very low flows. Once the meters were installed, Geneva and McCrometer worked tocontinued overleaf...

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