Finish Thompson FM2000 Series - Manual (Page 5)

Changing display from Rate or Total
Programming Menu Flow Chart
Calibration
While the FM-2000 has been calibrated at the factory, field calibration is possible to increase accuracy at a given flow. Use the flowing steps for
field calibration.
NOTE: If the meter has been previously field calibrated, the scale factors (Rate Scale and Total Scale factor) will need to be reset to factory default
values. Refer to “Step Six” using the default values from Figure 2.
NOTE: If the Front Panel Programming has been disabled, the meter cannot be calibrated until the Front Panel Programming has been re-enabled.
See “Disabling Front Panel Programming” Section. The factory default setting is “enabled” which allows changes to be made,
Step One – Determine Actual Volume versus Meter Reading
Compare the actual volume of the fluid being pumped with the volume shown on the meter. You can either use a calibrated container or you can
use a known weight. In either case, use as large a container as practical (for instance five-gallon versus one-gallon container).
NOTE: Press the button while in the “Total” main menu to reset the value to zero before starting the calibration process.
Step Two – Determine Multiplier Factor
To use the “volume” process, use the following steps:
a. Fill the container until it reaches the known volume mark.
b. Divide the known volume by the reading on the meter. Record this multiplier _____
For example, if using a five-gallon container and the meter reads 5.2 gallons the multiplier is .96.
To use the “known weight” process, use the following steps:
a. Weigh the container. Record this weight _____.
b. Fill the container with fluid. Record this weight _____.
c. Record the “total” volume of fluid shown on the meter display _____.
d. Subtract the weight of the container from the weight recorded in step b to arrive at a net fluid weight _____.
e. Determine fluid density. Water weighs approximately 8.33 pounds per US gallon or 1 kg per liter. To determine fluid density (weight per volume
unit), multiply the weight of water per gallon or liter by the specific gravity of the fluid (found on MSDS). Record density _____
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