Temperature calbration

[TheCrone]

Hiya,

Just as a test I used my cheese making thermometer in the milk for my yoghourt.  TMX registered temp was 37 degrees but my thermometer registered 49 degrees!

Has anyone else noticed this problem?  Exact temps in the 'dairy' can mean the difference between mozzarella and haloumi 

[cookie1]

I have never bothered to check mine. Obviously one of them is out of order.

[achookwoman]

I'll check and let you know what I get.

[TheCrone]

I'll check and let you know what I get.

Thank you!

[Babymaker]

There is a comment in one of the yoghurt threads about this, the problem being that the TMX registers 37C but the milk is in fact a lot hotter, I use a spare body thermometer to test the temp of my milk for yoghurt making

I don't think the problem is reaching a certain temp ie it will reach 100C perfectly heating cold water, so if you had to cook milk at a certain temp it would be fine but when you need to cool it down you should check it with another thermometer. Hope that makes sense.

[achookwoman]

I put 1 cup of cold water into THM bowl,  set it on gentle for 5 mins.  ( don't know if this is scientific).   Then tested the water with 4 thermometers ! The 2 candy thermomters said 35 and the 2 scientific ones (different makes) both said 37.  Hope this helps.

[Thermomixer]

The problem is with the recipe in EDC = says to let the milk cool to 37 - but when the 37 light is shining it may be anywhere between 37 and 49 degrees.  The recipe should say - wait until the 37 light goes out and then set to 37 degrees and add your culture.  Then you know you won't cook the culture.

[andiesenji]

I've tested the temps several times to be sure the food being heated or cooked is the correct temp.
The TMX is not at all accurate and that can be a problem with chocolate, dairy and other temp-sensitive foods.

I posted a photo of my solution in another thread, forgot which, here it is again.


Hole drilled in spatula flange just large enough to insert the probe of a Thermapen, which is very accurate.
I also have used the cable probe on a Thermoworks "remote" timer/thermometer combo.

[faffa_70]

The Thermomix is accurate when heating TO a temp - eg heating to 37 or 80^o but as Thermomixer says when it is showing heat in the bowl (as in the lights that show the heat) it is like those old strip thermometers that you used to put on your foreheads where it was either green, brown or yellow I think it was.

If the 37^O light is showing, then the temp has reached a minimum of 37 but could also be as warm as 49^o just not warm enough to make the 50^o light come on.

I always use a thermometer to check the temp when I am making yoghurt or else wait until the 37^o light goes off, then I know that the temp has dropped below 37^o.

The temp settings were built for heating to and cooking at temp, not an accurate temp of what is in the bowl as such after the cooking has ceased.

If the recipe instructions read as Thermomixer said "wait until the 37^o light goes off" then it would mean more people would have success 

Clear as mud now 

I love Andie's set up and I have that on the list of DH to do - though may have to wait for a while as I am a hard person to buy for when it comes to birthdays etc, so might get one for Easter lol

[Thermomixer]

Just to make it difficult and show that it is not completely accurate - wait til one of the lights go out and, with the temperature/time off (so you can't be heating) - turn the speed dial to mix the contents.

Sometimes you will find that after the contents have been mixed the temp appears to go up??  because the warmer part of the mixture is at the top and mixing allows the warmer stuff on top to mix with the cooler stuff - not a big difference - but don't rely on the light - especially when it is not being mixed !

[cookie1]

All very logical and clear when you think about it.

[Chelsea (Thermie Groupie)]

Just to make it difficult and show that it is not completely accurate - wait til one of the lights go out and, with the temperature/time off (so you can't be heating) - turn the speed dial to mix the contents.

Sometimes you will find that after the contents have been mixed the temp appears to go up??  because the warmer part of the mixture is at the top and mixing allows the warmer stuff on top to mix with the cooler stuff - not a big difference - but don't rely on the light - especially when it is not being mixed !

I've had that happen to me during yoghurt making.  It's a pain in the backside  .

[faffa_70]

That's why I love Andie's method, you can check it while it is mixing  she is very clever