On Thursday, 31 May 2018 19:16:56 UTC+1, Dave W wrote:
On Thu, 31 May 2018 03:05:37 -0700 (PDT), whisky-dave
wrote:

On Wednesday, 30 May 2018 19:19:11 UTC+1, Steve Walker wrote:
On 30/05/2018 09:24, newshound wrote:
On 30/05/2018 08:34, Bob Minchin wrote:
Pinnerite wrote:
Dave Plowman (News) wrote:

In article ,
Â*Â*Â* Pinnerite wrote:
I am trying to find a reasonably priced single oven with a digital
temerature readout. None of the sites I have visited boast of one.
Anybody any useful recent experience?

Do you mean one which reads the true temperature as measured by a
sensor,
rather than just a digital display of what it's meant to be?


Yes


I think any sensible manufacturer would not offer this as it would
clearly show the variations in temperature as the control system cut
in and out causing some customers to be dissatisfied and letters of
complaint.
I can't imagine other than a very high end oven employing a 3 term PID
controller when a gradual variation +/- a few degrees from a simple
bang bang controller would make no discernible difference in cooking
performance.

I've simply got a couple of "floating" thermocouples in my double oven
wired up to a standard display. It is interesting how rapidly the air
temperature drops when the door is opened, and how relatively slow it is
to recover. I regularly use an IR thermometer to check the temperature
of the linings, and sometimes use a probe in the joint. Several decades
ago Cannon had an oven which came with a built-in probe and display.

Not a conventional oven, but many years ago my parents had a Sharp
microwave with a temperature probe. You could set a temperature and a
time and it would heat to that temperature and then hold that
temperature for the set time.

SteveW

I wonder how that worked or was it a gimmick that didn't work that well.
Small wires would vapourise in a microwave.

How do you know that small wires were involved? Could be some
non-comducting fluid device.

Well most temp sensors use metal in their construction.
Which is why you couldn't just put a LCD display in a microwave oven.
I doubt you could just place a thermomerter in their either un less you has a suitable one, a meriry one might explode as would a standard alcohol filled one.

In such an oven you get really rapidily changing temperatures too, and it so much depends on what you are heating. I checked the o/p of my old oven years ago. What yuo do is heat about 200ml of water for say a minute or two then measure the temerature rise and apply the specific heat capacity of water to work out teh power of the oven. You can't just stick a standard themometer in the oven.