11
8150 Flow Totalizer
11. Total K-Factor
The TOTAL K-Factor is a multiple of the FLOW K-Factor. Use it to program the incremental count size of the Totalizer.
For example, if the ow RATE registers in litres per minute, the totalizer may be set to 1 (factory standard), so it counts in 1-litre
increments, or it may be set to 1000 so it counts in 1 kilolitre (1 m
3
) increments.
By converting the Flow K-Factor, the totalizer can also be set to count in other engineering units.
See sec. 17: "Flow and Total K-Factor selection" for additional information about Total K-Factor adjustments.
Example: Change the totalizer from 1-kilolitre increments to count in 10-kilolitre increments.
1. Hold the ENTER key for 2 seconds, then enter the SECURITY CODE.
The display shows the rst item in the
menu, AutoCAL.
2. Press the DOWN key two times to scroll to
the Total K-Factor.
3. Press the RIGHT key to select the Total
K-Factor for editing.
The rst element of the Total K-Factor will
begin ashing.
4. Press the RIGHT key six times to advance
the ashing element to the decimal point.
5. Press the DOWN key one time to move
the decimal point one position to the right.
6. Press the ENTER key to return to the
menu.
7. Press UP and DOWN keys together to exit
the menu and return to normal operation.
The display shows "Storing" for a few
seconds, then returns to the normal
operating display.
ENTER
1
2
3
4
5
6
7
ENTER
ENTER
ENTER
Enter security code
2 s
6x
2x
11.1 Adjusting the Flow K-Factor
If the Totalizer yields a consistent error, make corrections by either using the AutoCal function (section 9) or by manually adjusting the
Flow K-Factor by the percentage of error.
A smaller K-Factor increases the ow rate, while larger K-Factors reduce the ow rate.
Example:
•
The Flow K-Factor is set at 480.19 pulses per gallon.
•
The totalizer registers 10 gallons when the actual volume is known to be 11 gallons.
•
The error is 1 gallon divided by 10 gallons , or -10%. (The totalizer is counting 10% low, and the ow rate is reading 10% slow.)
•
Reduce the Flow K-Factor by 10%: 480.19 - 10% = 432.17.
•
Change the Flow K-Factor to 432 pulses per gallon.
The result: The totalizer must count 10% fewer pulses from the ow sensor to register one gallon, so both the totalizer and the ow rate
will increase by 10%.
