Hi
I have a old immersion circulator (model fisher polystat 24) that is broken in that everything works apart from the temperature setting.
the unit heats the water but does not stop at the set temperature it just keeps heating it until it boils (the light to indicate the unit has not reached the required temperature also remains on)
i am wondering if it may be either a broken thermocouple, or something more complicated. but i am confused as to what the elements on the unit are...
to me it looks like there could be two thermocouples, or is one a water level sensor or something else (the two metal poles in the picture)?
the wires from both go into two different circuit boards
(for heating there are three pre-set levels for laborotory application at 25, 30, 37 and then a variable setting, where you can turn the dial from 20-100C, and then a fine tuning dial where you can adjust +/- 1C)
just wanted some second opinions before i go and spend money on getting a new thermcouple or getting it repaired
sorry for the newbie question and thanks in advanced
I have a old immersion circulator (model fisher polystat 24) that is broken in that everything works apart from the temperature setting.
the unit heats the water but does not stop at the set temperature it just keeps heating it until it boils (the light to indicate the unit has not reached the required temperature also remains on)
i am wondering if it may be either a broken thermocouple, or something more complicated. but i am confused as to what the elements on the unit are...
to me it looks like there could be two thermocouples, or is one a water level sensor or something else (the two metal poles in the picture)?
the wires from both go into two different circuit boards
(for heating there are three pre-set levels for laborotory application at 25, 30, 37 and then a variable setting, where you can turn the dial from 20-100C, and then a fine tuning dial where you can adjust +/- 1C)
just wanted some second opinions before i go and spend money on getting a new thermcouple or getting it repaired
sorry for the newbie question and thanks in advanced
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