Recalibrating The Flow Meter - Raven Command FLEX II Calibration And Operation Manual

APPENDIX C

RECALIBRATING THE FLOW METER

To calibrate the flow meter:
UT Menu
RCM - Sprayer Menu Tools Menu
1. Fill the applicator tank with clean water.
2. Open the UT Menu and select the RCM - Sprayer menu button.
3. From the home screen, select the Tools Menu softkey along the right side of the display.
4. Select the System Settings tab along the top of the display and select the Rate Sensor Setup button.
5. Enter a value of 10 [38] for the meter cal.
6. Select the Totals softkey, then the Lifetime Totals tab.
7. Reset the amount applied counter.
8. Toggle the master switch and all boom sections to the off positions.
9. Remove a section hose and place it into a calibrated 5 gallon [19 L] container.
10. Toggle the master switch and the boom switch corresponding to the hose that was placed in the container.
11. Pump exactly 10 gallons [38 L] of water to fill the container twice.
12. Check the total volume registered on the Lifetime Totals tab. The reading displayed is the new meter cal value.
This value should be within ± 3% of the calibration number stamped on the tag of the flow meter.
13. Repeat this procedure several times to confirm accuracy. Always "zero out" the total volume display before
retesting.
NOTE: For increased precision, set meter cal to 100 [378] and pump 100 gallons [378 L] of water.
14. To verify the flow meter calibration, the fill applicator tank with a predetermined amount of measured liquid
(i.e. 250 gallons [946.4 L]).
NOTE: Do not rely on graduation marks molded into the applicator tank.
15. Empty the applicator tank under normal operating conditions.
If the total volume displayed is different from the predetermined amount of measured liquid by more than ±
3%, complete the following calculation:
Where CMC = the Corrected Meter Cal, MC = the Meter Cal used to apply the known volume, and VM = the
Volume measured by the Lifetime Totals tab, and VA = the predetermined volume applied.
FOR EXAMPLE:
The UT displays a Total Volume of 260 [984] when a Meter Cal of 720 [190] was used to apply a measured
volume of 250 gallons [946 L]. Therefore:
the Corrected Meter Cal is 749 [198]
16. Return to the Rate Sensor Setup menu and enter a value of 749 [198] for the meter cal.
120
CMC
English
×
720 260
CMC
----------------------- -
= = 749
250
RCM - Sprayer and AIM Command FLEX™ II Calibration and Operation Manual
System
Settings
MC V
×
M
---------------------- -
=
V
A
Metric
[ ] × [
190 984
CMC
--------------------------------- -
=
[ ]
946
Rate Sensor
Setup
Totals
]
[ ]
= 198