AW Gear Meters FEM-03 - Manual (Page 26)

FEM-03 Flow Monitor
Operation and Programming Manual
25

K-FACTOR is the average number of pulses per desired engineering unit that the transducer
produces.
Method:
1. Determine the number of decimal places desired for total display.
2. Round off the result of the formula to the desired accuracy.
3. Enter the KFT using only that number of decimal places.
Using too few decimal places can cause relatively large display errors up to several percent of actual
reading. Using too many decimal places can result in displays with a level of precision exceeding the
accuracy of the meter. The factory recommends using no more than four digits regardless of decimal
point position. The largest acceptable value for KFT is 65535 with the decimal in any location.
For example: A flowmeter has a K-factor 2053.57 imp/Gal and the display should read in Gallons with
accuracy to three decimal places.
KFT = 10000/2053.7 = 4.869568 for Gallons
Round off 4.869568 to three decimal places and enter 4.870 for KFT.
ENG UNITS A or B
You can program the engineering units for display of total using up to four letters. Example: GALS.
Default is: PULS
The blinking cursor highlights the left-most character first. The SEL key moves the cursor. Use the UP or
DN keys to scroll through the alphabet. After you have entered all characters, press ENT to store the
variable. The FEM-03 exits the variable programming mode and returns to the Total display.
RATIO AB/RATIO BA Programming (FEM-03Ax only)
The RATIO AB or RATIO BA screens (FEM-03Ax only) set up the FEM-03 for use as a ratio monitor.
For RATIO operation, both KFT A and KFT B Engineering Units must be the same; the FEM-03 does not
allow programming of ratio functions if the A and B KFT Engineering Units do not match.
When programming, follow these guidelines:

Program the channel A and B KFTs, decimal locations, and engineering units from the TOTAL A
and TOTAL B displays.

Program the parameters for ratio monitoring, including the ratio error limit percentages, from
the RATIO screen.
Notice