Setting Up- Calibrate the Flow Meter

V1.98 21/06/06

 

 

17.8.2 Flow Calibration for Balanced (Hardi) valves

Because the Balanced valve system used on Hardi Sprayers, the normal calibration procedure cannot be used. The following procedure is required for a Balanced valve systems, but can also be used on ‘normal’ valve systems.

1.Select Manual on the Sprayer switchbox, turn the pump on and all boom sections on.

2.Turn the Master ON, the sprayer should start spraying. Adjust the pressure to the normal spraying pressure around the middle of the nozzle range.

3.Ensure ‘Display Volume/Nozzle’ is selected on the FLOW window, see Section 17.4. The Flow Readout units will be ‘volume (L or Gal)/noz’. The value displayed in the Flow readout window will be volume/nozzle/minute.

4.For this test to be accurate all nozzles on the boom spray must be the same type and the nozzles must be in good condition (not worn). The flow meter should also be in good condition for this test to be accurate.

5.Place a jug under a nozzle and time for 1 minute.

Measure the volume of liquid coming out of the nozzle, this is the ‘Actual’ amount. Write the ‘Actual’ value down.

6.Compare this volume with the value shown in the Flow readout, volume/nozzle/minute directly under the Manual button, this is the ‘Calculated’ amount, write this value down.

7.Select the Tank icon, the Tank Setup window will be displayed, see Figure 60. Write down the current ‘Cal. Factor’ for the Flow meter as displayed.

8.Using the formula below this will calculate the new ‘Cal Factor’.

Current Cal. Factor X ‘Calculated’ Amount

= New Cal. Factor

‘Actual’ Amount

 

‘Calculated’ = value in Flow readout window

‘Actual’= amount measured in the jug for 1 nozzle for 1 minute.

9.To calculate the New Cal.Factor: Divide the ‘Calculated’ amount by the ‘Actual’ amount; then multiply by the Current Cal.Factor.

This value will be the New Cal. Factor.

10.Enter this New Cal. Factor using the Manual Entry method as explained in Section 9.0 (OPTIONS/Sensors/Flow).

Note: Jug tests are not as accurate as the total volume measurement as some errors will exist due to misting, over spray, nozzle tolerances, and variations in flow rates through boom hoses.

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Topcom X20 manual Setting Up- Calibrate the Flow Meter V1.98 21/06/06