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Measuring Temperature

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Rob.Wilson:
Hi Lads a spot of help needed

I need some way of measuring the temperature in a temporary core oven i am going to knock up ,,250C max ,,,,,,,,, I saw some were a set up with a multi meter and two wire wound together   :scratch:,,, any idea what type of wire ?  and how do you calibrate it ?  . or dose anyone have a better idea


Thanks Rob

John Rudd:
There are a number of ways of measuring temp...

Optical pyrometer..( I guess you aint got one to hand....) or there is the simple thermocouple...

A thermocouple is made by twisting together two disimmilar metal wires ( Iron/Constantan) that will generate an emf proportional to temperature...( Its called the Seebeck effect...  I'm a tiffy by trade..)

A standard dvm from Maplins should suffice for measuring the voltage 'though you may need tables to convert from volts to degrees( unlesse the dvm has a t/c input..! )

Have a look here: http://www.tc.co.uk/ I use this company at work, let me know if you have any queries. :thumbup:

Bluechip:
Rob

I got one of these  .. or similar  .. comes with a (type K ??) thermocouple  

http://www.rapidonline.com/Tools-Fasteners-Production-Equipment/Test-Equipment/Multimeters/328-Digital-LCD-multimeter/31051

Up to circa 900 c IIRC

Will look if interested ..

Quite surprised how accurate it was .. about +/- 6 C at 800 C   Checked by a mate in the test labs @ RR

Dave BC

OOOps EDIT ... spec says type K  .. memory not so shot as I thought  ... Hope yet .. :lol:

Bluechip:


No response from Rob yet !!!

Not gone down another hole has he .... :lol:  :lol:

Bluechip:
Could well be ..

Did notice a puff of smoke ....

I, too,  shall retire ...

Dave BC

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