A quick review of the layout and a quick check with a Multimeter.

Wednesday, November 3rd, 2010

Today was spent making slight changes to the layout of the control panel to make sure that everything is going to fit before we bolted it in. The space isn’t always that crucial but we decided to make our control box as small as we could, partly for cost savings but mostly for esthetics. We got everything to fit just like we wanted it without any problems, and we are ready to wire it up tomorrow. We also had to get the mod motor for our gas valve working. This is the valve that will allow us to turn our gas pressure up and down and vary our inlet air temperature. It is supposed to change its position based on the position of a 0-10 Vdc potentiometer. Our first problem was that the company that supplied it to us offered no support. The second problem that we ran into was that no one offered any support. Ok, no problem, the first thing you do when this happens is call the people you know who do offer support. In our case it was the people who supplied us with the potentiometer. They may not have any experience with the device that we are using, but they do know about potentiometers in general. They explained to me how most devices that are wired to a potentiometer work and how they are wired. With that information, I did some quick tests with a Multimeter to show me exactly how to wire it and after getting two wires mixed up we are almost on track. The only issue we have left with it is that the potentiometer that we bought has a 270 degree turning radius but the valve only turns 90 degrees (open/closed). This means that the valve only turns on 1/3 of the potentiometer’s radius which isn’t a huge problem. What we have will work for testing purposes until a new one shows up. The bottom line is that we now have complete control over our inlet air temperature from the control panel.

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