Yokogawa 202 Field Mounting Rate Totalizer User Manual
Page 16
Operation
12
3.4 CALCULATION OF RATE AND TOTAL
The flow rate, R, is calculated as follows:
where f
is the input frequency in Hz (pulses/second).
H is the timebase of rate and is 1 for seconds, 60 for minutes, 3600 for
hours and 86,400 for days.
S is the scaling factor (pulses/unit volume).
The scaling factor, S, is equal to the K-factor of the flowmeter expressed in pulses
per unit volume. The K-factor is flowmeter dependant and is supplied with the
flowmeter. It will be either on a calibration certificate or stamped on the body of
the meter.
The user programs the scaling factor and selects the timebase during the
programming procedure.
R
f x H
S
=