AW Gear Meters LLC-BA - Manual (Page 25)

LLC-BA Batch Unit
Operation and Programming Manual
24
KFT-Factor
For the LLC to display in a desired engineering unit such as Gallons, the user must program an
appropriate scaling factor, called the KFT factor. The KFT is calculated using the K-factor of the
transducer being monitored. The K-factor is the number of impulses per engineering unit established by
the transducer manufacturer or by a calibration test.
0010000. (factory default displays total pulses with no decimals)
To calculate the KFT factor, use the following formula:
KFT= 10000/K-FACTOR
Where:
- 10000 is a constant
- K-FACTOR is the average number of pulses per desired engineering unit that the
transducer produces.
Remove the insignificant decimals often produced with this calculation because they result in displays
with a misleading level of precision far exceeding the accuracy of the meter. Use a maximum of four
digits regardless of decimal point position! Enter KFT without regard to the location of the decimal point
in the display. The desired decimal location is entered in the next procedure. The largest acceptable
number for KFT is 65535.
For example:
A flowmeter has a K-factor 2053.7 imp/Gal and the display should read in Gallons.
KFT = 10000/2053.57 = 4.869568 for Gallons
486957 is > 65535! 48696 > 4 digits! 4870 is best! Enter 4870 for KFT. For this example, KFR=4.870,
the decimal point is set to three decimal places in the next procedure.
Set Decimal Point
Press and hold UP or DN to increase or decrease the value. To increase the increase or decrease rate,
while holding the UP or DN, press and hold the SEL for medium rate or ENT for maximum rate. When the
desired value is displayed, press ENT to store the programmed value and advance to the next variable.
Always release SEL or ENT before releasing UP or DN, or the LLC-BA will proceed to the next variable
leaving the last variable with an unpredictable value.
Notice