[Stoves] thermocouple to RS232 conection

[Lanny Henson]

Charlie,
That is very generous of you.  I have limited skills in this area but I need 
to learn.
How does it connect to a pc? does it need a power supply. Can I down load 
rs232 software?
I need to make sure that I can use it before I waist your resources.
Lanny

----- Original Message ----- 
From: "Charlie Sellers" <csellers42 at yahoo.com>
To: "Discussion of biomass cooking stoves" <stoves at listserv.repp.org>; 
<crispin at newdawn.sz>
Sent: Saturday, March 08, 2008 12:42 AM
Subject: [Stoves] thermocouple to RS232 conection


> Lanny,
>
> I may have one extra of these TC to digital devices, that should become 
> obsolete soon (so I need to ditch it) - 
> http://www.dghcorp.com/MERCHANT2/merchant.mv?Screen=CTGY&Store_Code=DO&Category_Code=FCT
> I like much more anything that is USB connected, but that is a newer thing 
> (and much cheaper).  Same situation for cheap PWM chips for infinite fan 
> control - that will soon be available for fan speed control too.
>
> This device needs a VDC supply (all chips do) and can accommodate up to 4 
> separate type K thermocouples (linearized and cold junction compensation, 
> leading to just a few degrees of error...).
>
> I'll trade you this for any simple software you develop for it, 
> particularly anything that does better than one data point per second - 
> not really needed, but more fun; and answers to any sheet metal stove 
> construction questions that I may have (as promised at ETHOS)!
>
> Charlie
>
> p.s. give me your address
>
>
>
>
>
> Lanny Henson <lannych at bellsouth.net> wrote: Crispin,
> For my latest pot module I am using pot with a lid, and I am testing a
> double wall insulated metal cap that seals the airflow through the gap.
> To seal the bottom I just sit the unit on the ground.
> My new 2 liter pot module, retained heat cooker will hold cooking temps 
> for
> an hour or so, and hold safe temps for a few hours.
> If you toss a blanket over it. It cooks and holds longer.
> I am testing it with an alcohol top jet soda can stove.
> I am looking for a thermometer with RS232 connection so I can plot temp
> charts.
> Lanny
>
>
> ----- Original Message ----- 
> From: "Crispin Pemberton-Pigott"
> To: "'Discussion of biomass cooking stoves'"
> Sent: Thursday, March 06, 2008 10:59 AM
> Subject: Re: [Stoves] Lanny Henson pot insulator
>
>
>> Dear Lanny
>>
>> I am following the subject closely.
>>
>> May I suggest that you make a lid that covers the pot and the vertical
>> spaces as well.
>>
>> This means two lids.  One to cook with and one that will turn it into a
>> retained heat cooker.
>>
>> If you made one lid ordinary (and cheap) it will function as normal. 
>> Then
>> make a lid with a 'pot cosy' over it to keep lid-heat in, and make it
>> bigger
>> in diameter so it blocks the top of the enclosed finned area. That will
>> prevent heat loss by rising are (a chimney effect).
>>
>> You don't have to seal the bottom because heat rises, not falls.
>>
>> What do you think?
>>
>> Regards
>> Crispin
>>
>>
>>
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