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Unread 08-03-2006, 01:58 PM   #8
bigben2k
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Join Date: May 2002
Location: Texas, U.S.A.
Posts: 8,302
Default Re: Simulating an RTD

Am still prepping this simulator.
Here's the list of resistors I got:
(1st column indicates quantity)

2 40Ω/0.5% (new)
2 129.401Ω/.01% (used)
2 200Ω/.01% (new)
2 300Ω/.01% (new)
2 2kΩ/.01% (used)
2 2.3333kΩ/.01% (new)
2 2.5kΩ/.01% (used)
2 5kΩ/.01% (used)
2 10kΩ/.01% (used)
2 13.889kΩ/.01% (new)
2 20kΩ/.01% (new)
2 20.41kΩ/.01% (new)
2 32kΩ/.01% (used)
2 40kΩ/.01% (used)
2 259.523kΩ/.01% (used)
2 16MΩ/.1% (new)

1 64 Ω 0.01% new
1 300 Ω 0.25% new
1.9 kΩ 0.01% used
1 2.0 kΩ 0.05% used
1 15 MΩ 0.1% used
1 10 kΩ 0.01% used
1 14.250 kΩ 0.01% used
1 5.410 kΩ 0.01% used
1 14.950 kΩ 0.01% used
1 31.175 kΩ 0.01% used

I've been advised by Bill that this is futile. I intend to learn the hard way (but some things become rapidly obvious). I will pickup another set of probes for 4-wire measurements on both my Fluke 8840A. This should help me determine what the Flukes can do, exactly.

I picked up a Keithly 193 from Bill, for temps only (The RTD measurement are "flaky").

A 200Ω resistor @ .01% puts this resistor's actual value somewhere between 199.98 and 200.02 Ohms.

I got a pack of twenty, 100 Ohm, multi-turn (15 turns) "Bourns Trimming Pots". (p/n 3009P-1-101).
ref: http://www.bourns.com/pdfs/3009.pdf
(PDF, one page, 85k)
I'll be building a 4 by 4 array of these, and see if I can replicate a specific resistance from there.

More later.
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