Pasteurization in multi-cooker on WARM function

[azaxev]

I made a jam wine and currently has good balance of alcohol and sweetness and need to stop fermentation. Decided to pasteurize.

I already have heater with thermostat - a multi-function pressure cooker, big enough for at least 4x 750mL bottles. Unfortunately mine does not have mode with user temperature preset, but WARM function is temperature controlled between 63-78'C.

Upper range 78'C is marginally close to ethanol evaporation 78.4'C, so if cooker thermostat overshoots, some ethanol will evaporate, aluminum foil cap should condense it and drip back.

Anyone has experience using multi-cooker to pasteurize products ?

 

[azaxev]

I did a pasteurization cycle and turns out the WARM function has very slow ramp-up, after 1hr temperature was only 42'C. Noticed cooker uses its 900W heater only for few seconds then shuts it off for a minute regardless of temperature. I do not believe there is any thermostatic control, but rather fixed duty cycle.

Ended up using another function and monitored temperature manually, same as its done with pot on the stove.

Conclusion, pressure cooker WARM function does not work for automatic pasteurization, at least not on my cooker. Different cooker with mode that allows presetting temperature might work