AW Gear Meters EMO-1005 - Manual (Page 13)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
REV. 1a 05/98 EMO-1005 Manual.DOC
12
RATE SCALING - KFR (Display 1)
By answering with a 0 the scaling will be skipped.
By answering with a 1 the following display appears:
CURRENT KFR/UNIT
XXXXXXXX.X YYYY
where,
XXXXXXX.X is the current rate scaling
YYYY is the selected engineering units
The EMO-1005 is programmed, at the factory, to calculate the incoming frequency in Hertz (Hz). In
order to make the EMO-1005 show a more convenient engineering unit, such as GPM, an appropriate
scaling factor must be applied. This factor is called the KFR and is calculated by applying the K-factor
of the transmitter that is being monitored. The K-factor is the number of impulses per engineering unit
and is published by the transmitter manufacturer or established by a calibration test. (AW-Company
provides a calibration test sheet with every flow meter).
For example a flowmeter could have a K-factor of 6304 imp/Gal or 329.22 imp/lit. A rpm pickup
could be 34.66 imp/rev.
In order to calculate the KFR multiplier for the EMO-1005 apply the following formula.
6000
KFR =
K-factor
where,
KFR is the number that should be entered in to the RATE SCALING display (Display1)
K-factor is the number published by the manufacturer as the average K-factor for the
transmitter.
100 is the constant if the time base is seconds.
6000 is the constant when the time base is minutes.
360000 is the constant when the time base is hours.
For example:
A flowmeter has the K-factor 2053.7 imp/Gal and the display should show Gallons/minute.
6000
KFR = = 2.921 GPM
2053.7
When entering the number into the EMO-1005 keep in mind that the maximum number is 65000
(regardless where the decimal point is.)