Thermoelectric Cooling Using Magnetic Stirring Cold/Hot Plate

The AHP-800MSP Magnetic Stirring Cold/Hot Plate from TECA Corporation provides uniform heating and cooling of a liquid load. Thermoelectric technology, a side mounting cold plate, and magnetic stir bars work together to provide uniform thermal management. Applications include titration testing; testing of drugs, specimens, and industrial chemicals; and process testing in laboratory or industrial settings. This recent product demonstration introduces some of its features, such as remote or internal temperature sensing with the flip of a switch.

Transcript

00:00:00 hello everyone Andy is going to show us the new tekka model ahp 800 MSP magnetic steering cold and hot plate hi Emily hello Andy here's the 800 MSP and it's cooling a 2,000 ml Beaker right now we have the temperature controller over here it's set up using the remote temperature sensor feature what we're going to do is we're going to swap out this bottle for

00:00:24 another bottle of a larger size so first we unscrew the clamp you can lift your Beaker right out take the front panel off and now I'm going to remove these four screws you have any questions about the MSP Emily well do you need to use the remote sensor no you don't need to use a remote sensor back here there's another sensor built in but given Thermo

00:00:50 uh thermodynamics and heat transfer that's not reading the fluid temperature so what you'd want to do is learn the difference between that back plate temperature and your fluid temperature and either program that directly into the uh temperature controller or just program your temperature controller down a little bit lower is the remote sensor included with the product yes the remote

00:01:12 sensor is included with the product and I suggest using that it's it's already autotuned and tuned for that uh so it it knows the the system as far as how fast and how slow everything cools uh and it's it's going to give you a lot better control if you're controlling right at the fluid tempure sure what is this pink material that I see in the background that's a material called Gap pad made by

00:01:36 burst and it's a soft heat transfer material often used in electronics to help them conform to the shape in this case it's helping us conform to the diameter of the bottle Here Comes what we call the sleeve pops right off and leaves behind what we call the shoe this is the way the unit comes stock the sleeves of various diameters for different size beakers are optional what

00:02:00 I'm going to do is take our large Beaker here and put it in place how large of a beaker is that that's a 3 and 1/2 L Beaker we can make pretty much all sizes up to that we've made a little bit larger and we've made irregular shapes that slides forward and down and then I clamp this just snug that's pushing a gasketed bar against the beaker to hold it against the Gap

00:02:24 pad for your temperature transfer your heat transfer now I take the probe and put it inside and the controller is going to now see that temperature and you can controling to that and the temperature controller is built in temperature controller is built in it has a a speed a fan speed control so when it needs to be noisy it is noisy and when it doesn't need to

00:02:47 it's quiet it has a software that interfaces with your computer and you can program uh ramping and soaking features on it uh we have some online typical tests that run from 4C to 40c just to see how fast and how well the unit controls so it does heating and cooling Heating and Cooling yes ma'am now you mentioned fan speed control sure is that something that the user can

00:03:11 adjust themselves right now this is adjusted to 50% fan speed so that when the requirement was high you could hear me talk it does get a little noisy when you first turn it on as it as it approaches the set point it gets much quieter if you reduce the fan speed would that affect the cooling performance of the unit yes it does it's it decreases the capacity a little bit

00:03:31 but uh often that's more comfortable to your ears so that's the AHB 800 MSP Emily excellent thank you Andy for showing that to us