Calibration Test

PC9435

Calibration Test


A-Tests Drop-Down Menu
B-Number of Nozzles That Will Spray Input Box


C-Test Speed Input Box
D-Rate Input Box


E-Volume to Dispense Per Nozzle Input Box


F-Master Switch Indicator
G-Start Calibration Button

NOTE: The calibration test is for use on sprayers and liquid fertilizer (not for use on NH3).

The Calibration test is used to calibrate the flowmeter. Place containers (such as calibration container) under up to 7 nozzles to capture volumes sprayed during the test. Note: Only 7 samples may be entered into the

sample volumes popup screen therefore only 7 nozzles are needed for the test. The calibration test may be repeated as many times as needed if all nozzles are to be tested. By measuring these samples and entering the values into the system, an accurate flowmeter calibration value can be attained. Follow the on-screen instructions as described.

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1. Select Calibration test from the tests drop-down menu.
2. Configure the control valve and flowmeter in Setup.

a. Go to the "GS2 Rate Controller - Setup" screen and select the "System" tab.

NOTE: Master switch must be off to enter data.

b. Enter the recommended Control Valve Calibration value.
c. Enter the default Flowmeter Calibration value as provided by the manufacturer.

NOTE: For RAVEN flowmeters, divide the number on the tag by 10 before entering. E.g. "2650 L" = 265 ("700 gal" = 70).

NOTE: The number on the RAVEN tag is pulses per 10 units of fluid and the value entered needs to be pulses per unit of fluid.


3. Be sure the flowmeter is clean.
4. Enable the sections to spray and enter the information below.

a. Go to the "GS2 Rate Controller-Main" screen.
b. Use the arrow buttons/switch box to arm boom sections from which solution will be collected.
c. Return to the "GS2 Rate Controller-Diagnostics" screen.
d. Enter the "Number of Nozzles that will Spray" (based upon enabled implement sections).
e. Enter a "Test Speed" such as 10 km/h (6.2 mi/h).
f. Enter the desired test spray "Rate" such as 94 L/ha (10 gal/ac).
g. Enter the "Volume to Dispense per Nozzle" such as 1.9 L (64 fl oz).

  • Any value may be used that will comfortably fit in a calibration container.

NOTE: The entered values must ensure a test length of more than 10 seconds, but less than 60 seconds. The status will remain as "ENTER DATA" until this condition is met.

IMPORTANT: Always fill the solution tank with clean water to do a proper calibration test. Variations of flow may exist between water and actual product, such as 32% N.


5. Turn Master Switch on, start test, and collect samples.

a. Ensure sample containers are properly positioned.
b. Turn the Master Switch on.
c. Press the "Start" button on the screen

6. Enter the collected sample volumes on the popup screen.

a. Enter the measured amounts collected from each container.
b. If fewer than 7 samples were collected, leave remaining values set to 0.
c. Press "Take Another Sample" if additional samples are desired.

7. Repeat steps 4 and 5 as necessary.

a. If it is desired to collect samples from other sprayer sections and/or nozzles in order to further confirm test results, press the cancel button and repeat steps 4 and 5.

8. Accept new calibration value.

a. Press the arrow button to accept the New Calibration Value.

9. Turn Master Spray Switch OFF at any time to cancel test.

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