stc1000 help needed

[david bray]

hi all just got an old fridge and thought I would try making a fermenting fridge using a stc 1000, all went well apart from the stc 1000 keeps jumping temp by 2 degree down then back up which keeps turning either the fridge on or the heater just wondered if anyone else has had this or is it just a my fault for buying cheap off ebay thats all

 

[stan]

don't know if this is any good for you

 

[david bray]

thanks Stan it works like that but just the temp keeps jumping 2 degrees

 

[Bigcol49]

Hi!
Can you post the seetings of your STC1000?

 

[david bray]

f1. 20.0
f2. 0.5
f3. 3
f4. 0.0

 

[Bigcol49]

Hi!
If the device is working correctly, the heater should kick in at 19.5° and the cooler at 20.5°.
I fund that I got wide fluctuations when I had the sensor hanging in the fridge. As son as I attached it to the FV it settled down and managed the temperature well.

 

[Drunkula]

I'd disconnect the probe, check the wire for any breaks and if there are any then get glue or something on them, then reattach making sure you get a good clamp on the wire - double it back along the cable and clamp onto that.

I had a probe that had the wire split near the end and moisture would change the resistance and readings would go all over the shop. It was when I was calibrating it against other thermometers in ice and boiling water it would go bonkers so I thought something was up.

 

[david bray]

Ok thanks I'll try that when I get home if not I'll try and post a video of what's happening

 

[halfpint]

I fitted a thermo well in my fermenter that took the temp probe, problem sorted, no more quick changes in fridge temps.