A.2
K-Factor and inverse K-Factor conversions
Equation A-1: Frequency volumetric flow rate K-Factor
KFactor =
FreqQFullScale
(MaxFreq)3600s § ℎr( * )
and
Equation A-2: Frequency volumetric flow rate inverse K-Factor
InvKFactor =
(MaxFreq)(3600s § ℎr)( * )
FreqQFullScale
where
KFactor = frequency “K-Factor” (pulses/volume**) (
Freq1KFactor
and
Freq2KFactor
)
InvKFactor = frequency “Inverse K-Factor” (volume**/pulse) (
Freq1InvKFactor
and
Freq2InvKFactor
)
FreqQ
FullScale
= frequency full-scale volumetric flow rate (volume**/time unit*)
(
Freq1FullScaleVolFlowRate
and
Freq2FullScaleVolFlowRate
)
MaxFreq = maximum frequency (Hz = pulses/time unit*) (
Freq1MaxFrequency
and
Freq2MaxFrequency
)
(*) TimeUnit = time conversion factor depends on the VolFlowRate Time Unit data point:
•
volume/second = 1 s/s
•
volume/minute = 60 s/m
•
volume/hour = 3600 s/h
•
volume/day = 86400 s/d
(**) Volume = where the volume is selected via data points:
•
Units System
•
VolUnitUS
—
gallons
—
barrels
•
VolUnitMetric
—
cubic meters
—
liters
Conversion factors
Maintenance and Troubleshooting Manual
April 2022
00809-0600-3104
92
Emerson.com/Rosemount