Angela Davis on sun 14 sep 08
I use a digital pyro for raku and we pull the thermocouple out at 1800F or
so and put it in the cool air. Has not caused me any problems, we
do the same at school also.
The only thing that eats our thermocouples is the cone 10 gas kiln, they
stay in
for the complete fireing and cool down.
Angela Davis in Homosassa where it's too hot for raku,
if you can imagine that.
----- Original Message -----
From: "Kathy Forer"
To:
Sent: Sunday, September 14, 2008 2:11 PM
Subject: pyrometer use
>I have two kilnsitter kilns, small and large, and one digital pyrometer.
>
> My question is whether it's okay to take the pyrometer from out of one
> of the kilns while the measured temperature is still high and use it
> for the other kiln.
>
> I'm not firing them both at the same time but sequentially this time.
> It seems it might give some kind of shock to take a pyrometer that's
> only recently been in 1000 degrees centigrade and put it somewhere
> else less than 100 degrees.
>
> Sometimes I'm overly cautious where it's not needed and heedless where
> I shouldn't be.
>
> Someone from this list teased me about using centigrade. I find it
> much simpler, that's all. 100 and 1000 are a lot easier to remember
> and juggle than 212 and 1830. I know it's about heat work and more
> than just numbers, but for bisque these numbers have been very helpful.
>
> Kathy
Mary & Wes Handrow on sun 14 sep 08
If your pyrometer is just the bimetal insert it should be OK, but if you
have a porcelain sleeve as most of them do you bet there will some thermal
shock and you will lose parts of the sleeve.
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Kathy Forer
Sent: Sunday, September 14, 2008 1:12 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: pyrometer use
I have two kilnsitter kilns, small and large, and one digital pyrometer.
My question is whether it's okay to take the pyrometer from out of one
of the kilns while the measured temperature is still high and use it
for the other kiln.
I'm not firing them both at the same time but sequentially this time.
It seems it might give some kind of shock to take a pyrometer that's
only recently been in 1000 degrees centigrade and put it somewhere
else less than 100 degrees.
Sometimes I'm overly cautious where it's not needed and heedless where
I shouldn't be.
Someone from this list teased me about using centigrade. I find it
much simpler, that's all. 100 and 1000 are a lot easier to remember
and juggle than 212 and 1830. I know it's about heat work and more
than just numbers, but for bisque these numbers have been very helpful.
Kathy
Kathy Forer on sun 14 sep 08
I have two kilnsitter kilns, small and large, and one digital pyrometer.
My question is whether it's okay to take the pyrometer from out of one
of the kilns while the measured temperature is still high and use it
for the other kiln.
I'm not firing them both at the same time but sequentially this time.
It seems it might give some kind of shock to take a pyrometer that's
only recently been in 1000 degrees centigrade and put it somewhere
else less than 100 degrees.
Sometimes I'm overly cautious where it's not needed and heedless where
I shouldn't be.
Someone from this list teased me about using centigrade. I find it
much simpler, that's all. 100 and 1000 are a lot easier to remember
and juggle than 212 and 1830. I know it's about heat work and more
than just numbers, but for bisque these numbers have been very helpful.
Kathy
Steve Mills on sun 14 sep 08
Kathy,
I do it frequently, the only danger is burning yourself or someone or something with the red-hot end as you transfer.
It doesn't seem to produce any ill effects to the equipment that I have noticed.
Also, keep using Centigrade and ignore the Teasers. You're quite right it's MUCH simpler.
Steve
Bath
UK
Stirring it as usual!!
--- On Sun, 9/14/08, Kathy Forer wrote:
From: Kathy Forer
Subject: pyrometer use
To: CLAYART@LSV.CERAMICS.ORG
Date: Sunday, September 14, 2008, 7:11 PM
I have two kilnsitter kilns, small and large, and one digital pyrometer.
My question is whether it's okay to take the pyrometer from out of one
of the kilns while the measured temperature is still high and use it
for the other kiln.
I'm not firing them both at the same time but sequentially this time.
It seems it might give some kind of shock to take a pyrometer that's
only recently been in 1000 degrees centigrade and put it somewhere
else less than 100 degrees.
Sometimes I'm overly cautious where it's not needed and heedless where
I shouldn't be.
Someone from this list teased me about using centigrade. I find it
much simpler, that's all. 100 and 1000 are a lot easier to remember
and juggle than 212 and 1830. I know it's about heat work and more
than just numbers, but for bisque these numbers have been very helpful.
Kathy
Sherron & Jim Bowen on mon 15 sep 08
We put our type K thermocouples in a porcelain sleeve and that way they
aren't exposed directly to the reducing atmosphere.
JB
+++++++++++++++++++++++++++++++++++++++++++++++++++++++
----- Original Message -----
From: "Angela Davis"
To:
Sent: Sunday, September 14, 2008 1:36 PM
Subject: Re: pyrometer use
>I use a digital pyro for raku and we pull the thermocouple out at 1800F or
> so and put it in the cool air. Has not caused me any problems, we
> do the same at school also.
> The only thing that eats our thermocouples is the cone 10 gas kiln, they
> stay in
> for the complete fireing and cool down.
>
> Angela Davis in Homosassa where it's too hot for raku,
> if you can imagine that.
Kathy Forer on tue 16 sep 08
On Sep 14, 2008, at 9:20 PM, Mary & Wes Handrow wrote:
> If your pyrometer is just the bimetal insert it should be OK, but if
> you
> have a porcelain sleeve as most of them do you bet there will some
> thermal
> shock and you will lose parts of the sleeve.
Do you mean the protection tube that goes over the "unsheathed
themocouple," or the inch-long tube bits that surround the
thermocouple? i.e. Left vs. right
http://www.pottery-books.com/axner/equipment/ultimax-digital-pyrometer.php
I'm guessing you mean the tube on the right otherwise nobody would be
doing what they say they're doing, swapping it from one kiln to
another. Thanks for permission to do that!
Kathy
jonathan byler on tue 16 sep 08
I haven't had any problems pulling the thermo couple out without the
protection tube. The little spacers seem not to be troubled by the
temperature swing. just don't set it down on something cold, like a
piece of metal. I have not messed about with the protection tube,
since it slows down the readings, because there is more thermal mass
to heat and cool in order to affect the actual temperature of the
thermocouple.
Just make sure you put the thermocouple on a spare softbrick or two
when you pull it out of a hot kiln. the thermocouple will be as hot
as the kiln was, and the spacers will help to hold that heat.
-jon
jon byler
3-D Building Coordinator
Art Department
Auburn University, AL 36849
On Sep 16, 2008, at 4:22 PM, Kathy Forer wrote:
> On Sep 14, 2008, at 9:20 PM, Mary & Wes Handrow wrote:
>
>> If your pyrometer is just the bimetal insert it should be OK, but if
>> you
>> have a porcelain sleeve as most of them do you bet there will some
>> thermal
>> shock and you will lose parts of the sleeve.
>
> Do you mean the protection tube that goes over the "unsheathed
> themocouple," or the inch-long tube bits that surround the
> thermocouple? i.e. Left vs. right
> http://www.pottery-books.com/axner/equipment/ultimax-digital-
> pyrometer.php
>
> I'm guessing you mean the tube on the right otherwise nobody would be
> doing what they say they're doing, swapping it from one kiln to
> another. Thanks for permission to do that!
>
> Kathy
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