Hello,
I’m using resistor based heating and peltier element for cooling on my prototype which could able to generate a thermal gradient of about 76degC.

I’m facing an issue with autotuning of resistor controller side - kp, Ti & Td values are kind of weird. Currently maximum temperature could achieve on hot side is 70degC (80degC is required). Cold side was about 4degC.

If increase the cold side to 10degC, there is some increase in hot temperatures to 75degC. Do you have any idea, how to control those temperature oscillations?

Thanks
Prasanna

 

Post more info about application, controller, and temp probe.

 

Controller details
Device type - 1089
Firmware version- 2.60
Firmware build number- 305
Hardware version - 1.70
Serial number-2052

Resistor details
uk.rs-online.com/web/p/panel-mount-fixed-resistors/0158468/

Peltier element details
https://www.conrad.de/de/peltier-el...l-x-b-x-h-25-x-36-mm-tes1-127021-1389162.html

Hope this information helps me..

Thanks
Prasanna