Thermocouple question

[ebee]

Remembered it after all these years?

Yes of course, we all remember some things, how do you find that strange? I am oresuming by your question that you do find it strange but you might not.

 

[ebee]

The post is 20 years old

Yes I am aware how old the post is, is that in anyway relevant to to post or my contribution?

Actually I was trying to remember the figures I had previously worked upon to produce this one off gadget so I did a search for info online and getting no easy answer I thought what about the Heating Bods on this forum? Some might have some info.
I suppose I could make contact the firm in question, its had a change of leadership and some business practice for a few years but they might still have it even if they do not use it, I did quite a lot of work for them in the past.

Anyway my search on this forum lead me to this post, so I thought I would ask the good folk on here.
Any problems? Do thermocouples work so differently nowadays? Have electrons changed speed and direction since then?
Does Electricity nowadays flow from Positive to Negative in order to align with charts and drawings of the past whereas it used to always flow from Negative to Positive in the old days?

 

[Jurassicspark]

Yes of course, we all remember some things,

Indeed we certainly do.

how do you find that strange?

Which part of:

"Remembered it after all these years?"

means or implies that I find that strange?

I am oresuming by your question that you do find it strange but you might not.

I really don't find it strange.

I just asked "remembered it after all these years"? and part of it was me being unsure if your apology was delivered to the other party.

 

[Jurassicspark]

Do thermocouples work so differently nowadays?

Seebeck effect still counts.

This basic physics hasn’t changed at all.

What has probably improved over time are the materials used, and the electronic instruments that measure and interpret the signal. Modern thermocouples use "cold junction compensation," but the electrons themselves behave exactly as they always have.

Have electrons changed speed and direction since then?
Does Electricity nowadays flow from Positive to Negative in order to align with charts and drawings of the past whereas it used to always flow from Negative to Positive in the old days?

No - electrons haven’t changed direction or speed over time.

The textbooks or any other diagrams would definitely show movement from positive to negative.

Don't we prefer it that way?

 

[ebee]

Seebeck effect still counts.

This basic physics hasn’t changed at all.

What has probably improved over time are the materials used, and the electronic instruments that measure and interpret the signal. Modern thermocouples use "cold-junction compensation," but the electrons themselves behave exactly as they always have.

No - electrons haven’t changed direction or speed over time.

The textbooks or any other diagrams would definitely show movement from positive to negative.

Don't we prefer it that way?

Well we made a guess and we realised out guess was wrong. Do we correct it and rewrite all the drawings and text? no, we decided to stick with what we thought we knew but realising it is actually the reverse and so long as we are aware that in most things it does not actually matter that much but to just be aware that sometimes it does and to realise those few times it does when it does,
Probably altogether the best way forward once we learned our mistake I think.

We did something some might say was equally wrong and daft with what we now call IT - when I was a kid at senior school (yes it was about three centuries ago before anyone asks) perhaps the conception of linear was better than logic when, I joined the after school "Computer Club" the logic boards were built using discrete transistors and a few more bits and we could do logic and "compute" a few simple ifs and whats on them.
"Computer" quite a real modern name, WOW! Logic gates and IC chips were getting more popular and things progressed, and has done so ever since.

Where is my Abacus and slide rule these days.
(One of our apprenticeship maths teachers called a slide rule a "Guessing Stick" good name I think. )