GF Signet 8150 Battery-Powered Flow Totalizer - Manual (Page 11)

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 fl 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 fi rst item in the menu, AutoCAL.
2. Press the ▼ key two times to scroll to the
Total K-Factor.
3. Press the ► key to select the Total K-Factor
for editing.
The fi rst element of the Total K-Factor will
begin fl ashing.
4. Press the ► key six times to advance the
fl ashing element to the decimal point.
5. Press the ▼ 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 ▲ and ▼ 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.
1
2 3 4
5 6
7
2 s
ENTER
6x 2x
Enter security code
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 fl ow rate, while larger K-Factors reduce the fl 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 fl 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 fl ow sensor to register one gallon, so both the totalizer and the fl ow rate
will increase by 10%.