TeeJet 844-R Speed Compensated Application Control - Manual (Page 20)

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Step 5 – Entering a New Flow Meter Calibration Number
The number displayed in the lower left hand corner of the display is the new flow
meter calibration number. Record this number, enter the System Setup Mode
and advance to the Flow Meter Calibration Number step. Enter the new value
from the test into this step and exit the System Setup Mode.
Step 6 – Double-checking the New Value
Double-check the new value by spraying a larger volume of water, such as 100
US gallons {83 Imperial gallons} through the flow meter. Before spraying the
larger volume, reset the memory counters by depressing and holding the
and
keys simultaneously for three seconds.
NOTE: After double-checking the new calibration number, if the volume
shown is more than +/- 3% in error, change the flow meter calibration
number in the system Setup Mode by the % difference it is in error.
Example: If the volume displayed is 5% too high, then increase the flow
meter calibration number by 5%. Example: If the volume displayed is 5%
too low, then decrease the flow meter calibration number by 5%.
M
ETHOD
2 – K
NOWN
T
IP
S
IZE
M
ETHOD
Step 1 – Check Tip Size
Determine the size tip on the sprayer. An actual flow collection should be done
on a representative sample to ensure the tips are not worn. To do this, set the
boom at 40psi. This must be pressure at the tips (i.e. use manual pressure gauge
mounted on the boom). Collect flow for 1 minute from 1 tip.
Example: XR8004 tip should spray 0.4 gallons in 1 minute {0.32 Imp Gal}
Step 2 – Count Tips
Count the total number of tips to be used for measure. You can use 1 boom
section, 2 boom sections, etc.
Example: Boom Section 1 has 10 tips