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Raven NH3 Parts
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Posted 4/16/2018 09:07 (#6713024 - in reply to #6712519)
Subject: RE: Raven NH3 Parts

Southern Minnesota Between Freeborn & Wells
Shimmy1 - 4/15/2018 10:41

Is the simple test on the control valve possible if running the system on the VT with a Pro 600 screen? We have verified that the section control valve operates, but could not figure out if we could test the control valve without having NH3 running through the system.

No experience with that combination. My remarks pertained to using a Raven 440 or the like.

The control valve can be tested with a 12 Volt battery. Unplug the connector at the standard control valve and run it off a 12V battery. A standard control valve only has two wires. Connecting them one way should cause the valve to open and eventually stop with the ball mostly open. Reversing the polarity should cause the valve to turn the opposite direction and eventually stop with the ball fully closed. This should take around 8 seconds to go from one extreme to the other. In normal operation, the controller gives a short "shot" of electricity in an attempt to nudge the ball in the correct direction if the rate is off slightly. If the rate is off considerably the system gives longer "shots" until the rate gets close and then it shifts back to short shots so as not to overshoot. The Valve Cal number dictates how the control circuit reacts. The standard 2123 for a Raven system is the usual suggested starting number for a standard control valve.

Edited by tedbear 4/16/2018 09:17
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