Uusing a TSTAT10 to control a building pressure control fan?

[wallwork.vince]

Hi, I"ve got a spare TSTAT-10 and wondering if I can configure it to control an EC fan (0-10V) based on a building pressure output/Input (0-20ma) from an available pressure sensor. The input range coming out of the pressure sensor is narrow (2-3ma for controllable range) I’m not familiar at all with programming so first question is can this be configured to work and if yes, any help in configuring would be most appreciated.

[maurice]

This is a very typical application for the Tstat10. There is a detailed description on how to build custom tables for inputs… found it:

Custom analog inputs

Here’s some screenshots showing how to configure transducers in general. From the inputs table, click in the range column at Tab1 to bring up the range setting dialog with the various sensor types available and select ‘Custom Range’ 50 at Tab2 which brings up another dialog where you set up the signal table. At Tab4 you see the settings to plug in for a typical 4-20ma or 0-10V transducer at the minimum and maximum range of the sensor. You can also type in the engineering units at Tab5. Finally…

After the input is configured you can create a setpoint in the variables, use the same engineering units for both: Pa or whatever it is you are using for pressure.

Then fill in both items into one of the PID controllers. Set the P term to perhaps 10% of full scale. Leave the I term and D term blank for now. After everything is set up you can come back and add some I term. You shouldnt need D term. There’s details on setting up PIDs in the T3000 help system. Hit F1 to bring up the help system.

Configure your output for the fan to 0-100%.

Once that’s done you write a short program.
FAN101 = PID1

You can include interlocks with the fan enable relay, schedule and so on once you have the basics going.

Add a trend log for all the ins, outs, vars in the system.

Create a graphic for the system for your user interface.

And that’s about it.