Mace HydroMace XCi, Руководство по эксплуатации продукта, Страница: 225 / 270

3. Enter the newly calculated k-factor in to the k-factor field of the “ Edit channel
” dialogue box and click
"
Apply
" to save the settings.
US Example:
Most pulsing flow meters, output a known number of pulses per unit volume . For example, an insertion-style
electromagnetic flowmeter, may output say 20.31 pulses/gallon in a 6" pipe. These pulses do not constitute a
" Flow rate " since all we know, is how many pulses are sent for a gallon of liquid that passes through the pipe
(20.31). To make these pulses a flow rate, they must be counted over a period of time and multiplied by a " K-
factor " to give volume per unit time .
The"known" " meter pulses/unit volume " must be converted to the required flow rate units and timebase
for use by the FloSeries3 Pulse card, using the following method:
1. The meter k-factor is published as pulses per unit volume (eg. pulses per gallon). This must be
converted to unit volume per pulse by inverting the published k-factor.
1 ÷ 20.31 = 0.049236 gallons per pulse
2. Convert the inverted k-factor to the correct timebase to be used in the flow rate calculation.
l
Multiply by 1 for seconds
l
Multiply by 60 for minutes
l
Multiply by 3600 for hours
l
Multiply by 86400 for days
eg. If the required flow rate units are in gal/min (gallons per minute) multiply the inverted k-factor by 60
0.049236 x 60 = 2.9542
MACE XCi User Manual - 225 -