Cathi Newlin on thu 3 nov 11
Hey all,
I have myself a shiny new Olympic DD9 and am getting ready to fire it up
for the first time.
Got a new thermocouple for my analog pyrometer too ;)
So, I am wanting to mount the pyrometer on the side of the kiln.
If I put a wad of kiln fiber between the outside wall of the kiln and
the body of the pyrometer, should that protect it and allow t to give an
accurate reading?
Thanks Gurus!
--
Cathi Newlin, Angels Camp, Ca
box49@caltel.com
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
http://www.CNewlin.com
William & Susan Schran User on thu 3 nov 11
On 11/3/11 4:29 PM, "Cathi Newlin" wrote:
> Got a new thermocouple for my analog pyrometer too ;)
> So, I am wanting to mount the pyrometer on the side of the kiln.
> If I put a wad of kiln fiber between the outside wall of the kiln and
> the body of the pyrometer, should that protect it and allow t to give an
> accurate reading?
Be better to mount the pyrometer on some type of metal bracket with a coupl=
e
inches of air space between it and wall of kiln.
Also make sure you install the thermocouple in a position so that it is not
above a burner. In the back wall would be a good location.
Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Arnold Howard on thu 3 nov 11
On 11/3/2011 3:29 PM, Cathi Newlin wrote:
> So, I am wanting to mount the pyrometer on the side of the kiln.
> If I put a wad of kiln fiber between the outside wall of the kiln and
> the body of the pyrometer, should that protect it and allow t to give an
> accurate reading?
Cathi, I suggest that you keep the pyrometer at least 8" from the side
of the kiln.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Rogier Donker on fri 4 nov 11
Hey Cathi...
"Been there, done that." DON'T! The ambient temperature of the kiln
will melt the pyrometer case notwithstanding that bit of kaowool/
fiber between it and the kiln wall. Mount the pyrometer on the wall
next to the kiln!
Rogier
P.S. See us on the web at http://www.donkerstudio.org
Michael Wendt on fri 4 nov 11
Cathi,
If mounting the prometer on the outside of the kiln,
don't use Kaowool. Sheet metal bent into a shape like
this will allow air to cool the plastic case and prevent
melting it.
______________
[______________] pyrometer
_] [_ bent metal
___________________ kiln control box
Regards,
Michael Wendt
> Hey all,
> I have myself a shiny new Olympic DD9 and am getting ready
> to fire it up
> for the first time.
> Got a new thermocouple for my analog pyrometer too ;)
> So, I am wanting to mount the pyrometer on the side of the
> kiln.
> If I put a wad of kiln fiber between the outside wall of
> the kiln and
> the body of the pyrometer, should that protect it and
> allow t to give an
> accurate reading?
>
> Thanks Gurus!
>
> --
> Cathi Newlin, Angels Camp, Ca
> box49@caltel.com
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> http://www.CNewlin.com
Cathi Newlin on fri 4 nov 11
Hi Rogier, thanks for the reply!
So is damage to the case, as opposed to inaccurate reading the primary
concern?
I ask because my case is mostly steel, open in the back. The only
plastic is the dial cover and a couple of bits inside it (hence the kiln
fiber).
Like this:
I only ask because at this time, I don't actually *have* a wall to hang
the thing on.
On 11/3/2011 2:17 PM, William & Susan Schran User wrote:
> On 11/3/11 4:29 PM, "Cathi Newlin" wrote:
>
>> Got a new thermocouple for my analog pyrometer too ;)
>> So, I am wanting to mount the pyrometer on the side of the kiln.
>> If I put a wad of kiln fiber between the outside wall of the kiln and
>> the body of the pyrometer, should that protect it and allow t to give an
>> accurate reading?
> Be better to mount the pyrometer on some type of metal bracket with a cou=
ple
> inches of air space between it and wall of kiln.
>
> Also make sure you install the thermocouple in a position so that it is n=
ot
> above a burner. In the back wall would be a good location.
>
> Bill
>
--
Cathi Newlin, Angels Camp, Ca
box49@caltel.com
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
http://www.CNewlin.com
William & Susan Schran User on fri 4 nov 11
On 11/4/11 1:12 PM, "Cathi Newlin" wrote:
> Hi Rogier, thanks for the reply!
> So is damage to the case, as opposed to inaccurate reading the primary
> concern?
> I ask because my case is mostly steel, open in the back. The only plasti=
=3D
c is
> the dial cover and a couple of bits inside it (hence the kiln fiber).
> I only ask because at this time, I don't actually *have* a wall to hang =
=3D
the
> thing on.
>=3D20
> Cathi,
>=3D20
> If you could get a piece of sheet metal, about 18=3DB2 long x height of p=
yrom=3D
eter
> bracket and bend into an =3DB3L=3DB2 shape.
> Shorter end of =3DB3L=3DB2 shape is 6=3DB2 long, long end is 12=3DB2 long=
.
> Mount short end to kiln wall with 4 or 5 sheet metal screws.
> Mount pyrometer towards end of long part.
> This should have the pyrometer far enough away to not affect reading or
> melting the plastic case.
> I would also suggest you might want to get a ceramic protection tube for =
=3D
your
> thermocouple.
> This will protect from damage bumping shelves into it and I think make it=
=3D
last
> longer in reduction atmosphere.
>=3D20
> Look up some local sheet metal shops that make metal duct work.
> Might be able to get a piece of scrap for a mug.
>=3D20
> Bill
>=3D20
--=3D20
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
> =3D20
> =3D20
>>=3D20
> =3D20
> =3D20
Fredrick Paget on fri 4 nov 11
Cathi,
The thermocouple is calibrated with the cool end of the thermocouple
(which in your setup is inside the analog meter) to be at a certain
cold temperature. There are standards on this that I have forgotten
in the many years since I retired but it is some where around room
temperature.
In your case the hot end of the thermocouple is in the kiln and the
cold "Junction", as it is called is at the end of the 2 conducter
special thermocouple lead wire that runs from the kiln mounted heavy
wire thermocouple to the meter. That pair of wires in most types of
thermocouples is made of the exact same two metals as the heavy
wire thermocouple. (Not if you have a platinum thermocouple -then
the lead wire is a cheaper metal that works pretty well in normal
environments). The meter measures the very small current of
electricity that is generated by the difference in temperature of the
hot junction and the cold junction of two different metals.
There are about a dozen different standard kinds of thermocouples
using all kinds of different metals. Most are no good at kiln
temperature so potters seldom see them.
What I am trying to say is if the meter gets pretty hot it won't read
accurately. Furthermore the guts of the meter can't take a lot of
heat either.
About insulation- it is not something that stops heat. It just slows
it down. If the cold side of the insulation is up against a surface
where the heat that slowly travels through it can not escape, it will
get hotter and hotter until the "cold" side is as hot as the other
side.
You must ventilate the cold side of insulation to avoid this.
Fred Paget
--
Twin Dragon Studio
Mill Valley, CA, USA
Steve Mills on fri 4 nov 11
I use a slab of 1" Vermiculite based heat insulation board for that job. I =
w=3D
ould avoid using untreated Fibre in the open, besides the outside of your K=
i=3D
ln won't get hot enough to warrant the use of "Hot-Face" material there.=3D=
20
As the cable from my probe also has to pass close to the casing, the piece =
o=3D
f board is big enough to protect that as well.=3D20
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my Ipod touch
On 3 Nov 2011, at 20:29, Cathi Newlin wrote:
> Hey all,
> I have myself a shiny new Olympic DD9 and am getting ready to fire it up
> for the first time.
> Got a new thermocouple for my analog pyrometer too ;)
> So, I am wanting to mount the pyrometer on the side of the kiln.
> If I put a wad of kiln fiber between the outside wall of the kiln and
> the body of the pyrometer, should that protect it and allow t to give an
> accurate reading?
>=3D20
> Thanks Gurus!
>=3D20
> --
> Cathi Newlin, Angels Camp, Ca
> box49@caltel.com
> =3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D=
3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D
=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D=3D3D
> http://www.CNewlin.com
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