search  current discussion  categories  kilns & firing - cones & controllers 

another look at the elusive pyrometer

updated thu 5 aug 99

 

Steve Dalton on wed 4 aug 99

Doug and everybody else who has helped me with ideas-thanks.
I'm going to try the new lead wires. I figured since I needed a
multimeter anyway that I'd try it with my kiln.
Thanks again.
Steve
----------
> From: douglas adams
> To: CLAYART@LSV.UKY.EDU
> Subject: Re: Pyrometers
> Date: Sun, 1 Aug 1999 11:23:53 EDT
>
>----------------------------Original message----------------------------
>Steve, answers to both questions are yes.
>Have you replaced the leads going to your pyrometer? A tiny crack in the
>lead invisible to the human eye can also cause this type of problem.
>
>If your going to use a digital multi meter, don't get a cheap one. Remember
>you get what you pay for! Fluke sells a meter designed for temp. and WW
>Granger has them in their catalog.
>
> You could use any digital meter and calibrate it to your leads and
>thermocouple. Take Ice water at 32 f. or boiling water at 212 f.( at sea
>level) put your thermocouple in it and take a reading on millivolts. As an
>example let's say you used the boiling water, and it reads 6 millivolts.
>Then for each 6 millivolts the meter reads you multiply it by 212 to get
>your temp. The problem here is that the lowest incriment of temp. you can
>get is 35.3333.... per millivolt. Buy a fluke and have the conversions
>worked out for you.
>
>Hope this helps! Douglas Adams
>
>
>
>
>>----------------------------Original message----------------------------
>>Hi there everybody,
>>Well here's the question of the week or so. I have an analog pyrometer,
>>and ever so often it works. I've replaced the thermocoupler and it worked
>
>>
>> Can I repair it?
>>
>
>>
>>Here's another thought, since all it's reading is millivolts-couldn't a
>>person go
>>get a small cheap digital volt-meter and hook that up with the
>>thermocoupler?