Immersion Heater Control using LabView data

[Sakib001]

Hi,

I have a high precision thermometer (Hart Scientific Black Stack) to get the temperature readings of an oil bath. I use a RS232 to USB communication to get the temperature readings from the device into my computer. I use a LabView code in the computer to capture these data and do necessary analysis. Now, I would like to use these temperature data to control an immersion heater so that I could control the temperature of the oil bath (for both isothermal and ramp/soak experiments). I would be so so grateful to receive ideads about the requirements (both hardware & software) to have this thing set up ...

Thanks

Nazam

[TYtanic]

Hey Nazam,

It sounds like you are able to see the temperature in LabVIEW so now you're just looking for information on how to control the heater, is that correct?

If so, can you give us some more details on what kind of heater it is (model number) and how it is usually controlled?

[mikeporter]

What sort of interface does the heater have? Is it serial as well?

Mike...

[Sakib001]

Hi TYtanic,

Sorry for the delayed response. Yes, you are absolutely right. I get all the temperature data logged in an excel file using the LabView code. I need to know how can I use these data to control my heating operation.

I just ordered the heater that meets my requirements. Specidications are: Make: OMEGA, Model No. TMW-215A/120, Watts: 1500, Volts: 120 and Single Phase. Do you think I need a seperate temperature controller to control this heating operation. Can I do this without the controller as I do not have one?

Please help ...

Nazam

[Sakib001]

Hi Mike,

I just ordered the heater that meets my requireements. This is actually an immersion heater for smal tank applications. Specidications are: Make: OMEGA, Model No. TMW-215A/120, Watts: 1500, Volts: 120 and Single Phase. Please have the datasheet of the heater as attached. I do not think this has any serial interface.

Thanks

Nazam

[Sakib001]

Hi,

Anyone there to help?? Do need your advice on this ...

Thanks

Nazam

[GerdW]

Hi sakib,

easy control: switch off the heater when (setpoint + hysteresis) < oil temp and switch on, when (setpoint - hysteresis) >= oil temp…

 

You will need a relay to switch on/off this heater. And a circuit to drive your relay…

[Omar_II]

That is just the heater element. Nothing more.

From the questions you are asking, I think you need to get you an licensed electrician to wire it up safely.

So you do not burn some thing down or kill someone.

Go to Home Depot and buy a water heater element and thermostat.

http://www.homedepot.com/s/water+heater+element?NCNI-5

You will need wiring and lugs and electrical plug to plug it into a wall outlet.

If you need to control it from your program, you will need some type of Digital Out device, and a relay to control the AC power from your wall outlet.

See

Bang–bang_control