If you are utilizing Labview, how does this controller fit into the scheme of things ?

Actually I will try Delphi VSL or Matlab for Hmi.I didn't plan DS18B20 sensor(with Arduino) system yet,this is another(seperate)system.Labview's (or etc).sensors link with Arduino.I will use Labview for testing.

 

Actually I will try Delphi VSL or Matlab for Hmi.I didn't plan DS18B20 sensor(with Arduino) system yet,this is another(seperate)system.Labview's (or etc).sensors link with Arduino.I will use Labview for testing.

I’m asking thinking that if you had those tools, why wouldn’t you build something that had real control over your experiment. I could be wrong of course, which I reserve the right, but it has me thinking of roasting coffee, or soldering pcbs. Well defined heat profiles on command. Otherwise, milk boils right around 100 c.

 

Otherwise, milk boils right around 100 c.

This may be true at sea level. At higher altitudes milk (and water) will boil at lower temperatures.

Where I live the elevation is 4550 feet above sea level. Water boils at around 203.8˚F (95.4˚C).

See: https://www.omnicalculator.com/chemistry/boiling-point-altitude

 

This may be true at sea level. At higher altitudes milk (and water) will boil at lower temperatures.

Where I live the elevation is 4550 feet above sea level. Water boils at around 203.8˚F (95.4˚C).

See: https://www.omnicalculator.com/chemistry/boiling-point-altitude

I wonder if 'around' gets bigger with less atmosphere?

 

The lower the air pressure the lower the boiling point. I've seen water boil in a syringe. Fill it half with water and then put your finger over the opening at the tip where you normally put the needle and then pull on the plunger. Air bubbles will appear out of nowhere. As soon as you let the plunger go back the bubbles disappear. Part of it may be dissolved oxygen in the water. But there's a reason why it doesn't rain in space. Water evaporates to its gaseous state.

I've seen video of the ocean bottom where they have found what they call "Black Smokers". Water temperature coming out of these smokers is hot enough to melt lead. Think I once heard the number 8000˚F mentioned once. The reason why the water isn't boiling is because of the intense pressure from the ocean above. The temperature at which water boils at is dependent upon the ambient pressure.

 

The lower the air pressure the lower the boiling point. I've seen water boil in a syringe. Fill it half with water and then put your finger over the opening at the tip where you normally put the needle and then pull on the plunger. Air bubbles will appear out of nowhere. As soon as you let the plunger go back the bubbles disappear. Part of it may be dissolved oxygen in the water. But there's a reason why it doesn't rain in space. Water evaporates to its gaseous state.

I've seen video of the ocean bottom where they have found what they call "Black Smokers". Water temperature coming out of these smokers is hot enough to melt lead. Think I once heard the number 8000˚F mentioned once. The reason why the water isn't boiling is because of the intense pressure from the ocean above. The temperature at which water boils at is dependent upon the ambient pressure.

You might have something there. Get rid of the W1209 and turn up the vacuum on the milking machine.

 

Boiling consists of raising the liquid's temperature so that the vapor pressure exceeds the surrounding ambient pressure. Thus for normal liquids lowering the surrounding pressure lowers the boiling point.
AND certainly Labview has the capability to control temperature far better than any small circuit board device. And if the Labview software is already in hand it is by far a better choice.

 

Boiling consists of raising the liquid's temperature so that the vapor pressure exceeds the surrounding ambient pressure. Thus for normal liquids lowering the surrounding pressure lowers the boiling point.
AND certainly Labview has the capability to control temperature far better than any small circuit board device. And if the Labview software is already in hand it is by far a better choice.

I'm considering this option too. I'll do the simple first and go towards the complex one.I m learning.

 

I'm considering this option too. I'll do the simple first and go towards the complex one.I m learning.

The simple approach could work, if you understand the complexity of heat dynamics in a closed loop system. The complex approach could also work if the complexity was shielded from you by simple constructs and interfaces. The choice should be which ever one reliably removes the need for intervention, so you can manage the larger intent.

 

I'm considering this option too. I'll do the simple first and go towards the complex one.I m learning.

If LabView already is handing the temperature recording then adding a heater on/off control will be very simple. One digita output to drive an SSR and a few more lines of code.