Badger Meter Fluid Management System - Manual (Page 15)

Installation & Operation Manual
CALCULATING THE SCALE FACTOR
A Scale Factor is a number used to adjust meter accuracy. The Scale Factor is set at the factory using motor oil with a viscosity
of 10W.
The primary use for Scale Factor recalibration is to batch fluids with different viscosities. If the fluid has a lower viscosity, more
fluid can slip past the meter gears without being detected. Changing the Scale Factor adjusts the meter to compensate for
the loss.
The meter multiplies each pulse by the Scale Factor number to correct the accuracy when it converts to the specified units.
The reading is then always correct.
For an approximate Scale Factor for fluids of different viscosities, consult the charts on the next page.
NOTE: N The meter’s original Scale Factor was written on the trigger when it was calibrated at the factory. It may have been
revised after field installation. Use the Scale Factor showing on the display, not the one written on the trigger.
IMPORTANT
Changing the Scale Factor changes the accuracy of the meter, potentially causing over-dispensing or under-dispensing of the liquid.
Viewing the Current Scale Factor
To view the current Scale Factor, press and hold the TOTAL button and the AUTO button at the same time.
Absolute Scale Factor
For absolute Scale Factor, perform this test:
1. Run a measured amount of fluid through the meter.
2. If the meter delivers 4.20 quarts and the display shows only 4.00 quarts, then the Scale Factor needs to be adjusted.
3. Divide what the meter delivered (4.20) by what the display shows (4.00). You get an error factor of (1.05).
The existing Scale Factor is 1.0123.
4. To calculate a new factor: 1.0123 (existing Scale Factor) x 1.05 (error factor) = 1.0629 (new Scale Factor).
5. Enter that number as described in the Change Scale Factor section of this manual.
NOTE: N Use the Scale Factor showing on the display, not one written on the trigger.
Page 15 November 2012