Err, I didn't measure temp in my freezer.

I made 1 assumption: ice melting on a chip will be at a temp very close to
0*C = 32F
Then, I touched the chip and burned my finger after using the soldering iron
on it.
My next assumption was based on experience...  Temp must have been abowe
50*C for me to burn my finger.

So 0-50*C gave less than 20 kHz total variation.

    Kyrre

----- Original Message -----
From: "Paul Hutchinson" <phutchinson@IMTRA.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, November 08, 2002 3:45 PM
Subject: Re: [PIC]: How is the stability of the 16F628's internaloscillator
?


> You better check the owners manual for your refrigerator freezer, grab a
> thermometer and tweak the thermostat. Every freezer I've used is designed
to
> run at 0 to 5 degreesF and the refrigerator compartment is between 32 an
38
> degF. A temperature of 10 to 20degF in a freezer will give soft ice cream
> and premature food spoilage.
>
> Here's a publication from the USDA about temperature for food storage
> safety.
> http://www.fsis.usda.gov/OA/pubs/aptherm.htm
>
> Paul
>
> > -----Original Message-----
> > From: pic microcontroller discussion list
> > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Gordon Varney
> > Sent: Friday, November 08, 2002 9:15 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: [PIC]: How is the stability of the 16F628's
> > internaloscillator ?
> >
> >
> > The real problem with the freezer method, or ice cube is that the ice
> > cube is at the same temp as the freezer and that is only 10 to 20
> > degrees. Most freezers are not much cooler than that. and a deep
> > freezer is only about 5 degrees.  (Also to much water and moisture).
> >
> > The best method is to go a local office supply store, and buy canned
> > air. The type to blow out the key board or just to blow out the inside
> > of sensitive electronics as the ads state. Turn it upside down and
> > spray the propellant. (-20 to -30 degrees) be care of frost byte. (I'm
> > serious) Spray it directly onto the board or just barely pull the
> > trigger to drip the liquid onto a single part. (You can also find an
> > intermittent connection real fast. ) I have placed a circuit board
> > into an insulated freezer bag, then blasted a can of canned air
> > (upside down) into the bag closed it for a half hour, opened the bad
> > to measure the temp at -10 degrees. The board is good and soaked then.
> >
> > Gordon Varney
> > www.voiceactiveremote.com
> > www.talk2it.com
> >
>
> --
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>
>
>

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