Topcon A2677 manual 18-13

X20 Sprayer Reference Manual

The Dickey-Johnsetting is for the Dickey-John Regulator Valve and is very fast. The same principles apply in setting up or tuning the system, just the numbers will be different. Note that the PWM settings have an entirely different range of settings. If good control cannot be achieved with the set of values available for that valve, try another set. The settings groups are simply optimized for the valve indicated. Different models may require different settings, although they are from the same manufacturer. (See Raven below).

The Raven setting is for the Raven Fast Flow valve only. The normal Raven system uses the Standard settings. The Fast Flow valve MUST have the PWM set to 100%. Any reduction of the PWM results in the valve operating very slowly due to the control electronics in the valve. This valve operates fully closed to fully open in 1.5 seconds and is used for the dump as well as the control. Because it is the dump valve as well as control, the Close Valve When Flow Off option needs to be ticked.

This valve can be difficult to setup, but the Max and Min values and the Gain settings are the only settings that can be changed. Setting the (Flow Meter) Sensitivity to Reduced may help. The Sprayers fitted with this valve usually have an under-rated pressure relief system and it is recommended to install another adjustable relief valve.

A2677 Rev 1.5 18-13