Re: Interfacing to a thermocouple
- From: "Dan Hollands" <dhollan3@xxxxxxxxxxxxxxxx>
- Date: Wed, 28 Dec 2005 18:08:35 GMT
"John Popelish" <jpopelish@xxxxxxxx> wrote in message
news:s6SdnTioQJAiIy_enZ2dnUVZ_sadnZ2d@xxxxxxxxxxxxxxx
> Nick. wrote:
>> I need to set my thinking straight on how to connect to a type-K
>> thermocouple...
>>
>> The hot junction is straightforward. The "cold" end is terminated by a
>> plug. This will connect to a PCB-mounted socket, which will connect to an
>> AD595 cold-junction compensated amp. Obviously there are now several
>> "cold
>> junctions" (thermocouple to plug, plug to socket, socket to solder,
>> solder
>> to copper etc...)
>>
>> Am I correct in assuming that as long as these are maintained at the same
>> temperature they won't skew the actual temperature measurement?
>
> Yes.
And the cold junction of the OpAmp must be at that same temperature
Often the plugs and sockets are made out of thermocouple material which
takes them out of the equation. Everything from the point were the
thermocouple material connects to non thermocouple material must be at the
same temperature. Careful arrangement of components to avoid heating or
moving air is required to make a stable accurate device.
Dan
--
Dan Hollands
1120 S Creek Dr
Webster NY 14580
585-872-2606
dhollan3@xxxxxxxxxxxxxxxx
www.QuickScoreRace.com
.
- References:
- Re: Interfacing to a thermocouple
- From: John Popelish
- Re: Interfacing to a thermocouple
- Prev by Date: Re: Interfacing to a thermocouple
- Next by Date: Re: MOSFET transconductance
- Previous by thread: Re: Interfacing to a thermocouple
- Next by thread: Re: Interfacing to a thermocouple
- Index(es):
Relevant Pages
|
