Temperature controll

[Edvin]

Do have any one a sample of temperature controller for P100 to JZ10-11-UA24 ???

[Joe Tauser]

Are you looking to do PID or on/off control?

Joe T.

[Edvin]

On 04.11.2016. at 11:38 AM, Edvin said:

Do have any one a sample of temperature controller for P100 to JZ10-11-UA24 ???

I looking for controll with PID

[Joe Tauser]

Open the Help Menu on the U90 software and look at Sample U90 Projects->Examples ->PID.  There are several programs you can look at.

Joe T.

[Edvin]

O.k. Thank you Joe T.

[cantcliff]

Keep in mind the PID loop only functions in one direction, heating or cooling.  In order to handle both you'll need a logic setup to switch between two PID loops.

 

 

[Edvin]

O.K. Thanks

 

[Edvin]

Hello,

Does someone have, some project or program instruction for temperature and humidity control using  2X PT 100 ??

[Joe Tauser]

Are you trying control humidity using a wet bulb / dry bulb configuration?  If so, I'd advise against it.  A humidity sensor is much easier.

Joe T.

[Edvin]

Yes, I'd like to know that is how it works what for logic or math functions someone  use for control using bulb/dry PT100  .. I know that the humidity sensor is better and simple variant.

But I'd like to know, and this principle ..

[Joe Tauser]

I actually ran into this on a test fixture designed for vacuum cleaners.  Moisture content of the air was part of the power calculation.

Here is a paper on the equations needed to do what you want:

http://maxwellsci.com/print/rjaset/v6-2984-2987.pdf

Look through the equations and you see exponents are involved in getting the saturation vapor pressure.  This math is beyond what a Jazz is designed to do.  Floating points are needed.

Unless you're really a glutton for punishment.  Google "Taylor Series Expansion of Exponential Functions", which can probably be done in a Jazz.  Many, many moons ago I did this in a Siemens PLC to calculate cosine.

However, if you ask me to provide an example of how to do a Taylor Series in a Jazz I will reach through the Internet and choke you.

Joe T.