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Author Topic: RTD Simulator schematic/project  (Read 3163 times)
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wanderingmoose
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« on: August 09, 2010, 05:15:03 05:15 »

I have searched the net for a digital RTD simulator schematic/project. Have not found one.
I would like to get past the tuning of a ten turn 200 ohm pot with a multimeter and then hooking it to the transmitter for testing, but not want to pay the big price of a ready made one.

Has anyone built one or have access to a schematic?

RTD is a temperature measurement device.
This is a example of a commercially built RTD simulator:Altek Model 311A Universal RTD Calibrator
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wanderingmoose
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« Reply #1 on: August 09, 2010, 07:21:39 07:21 »

I used to use a resistor decade box to calibrate RTD circuits. It was a real antique (I think heathkit) good for .01 ohm. The nominal resistance was 350 ohm, I plotted the temps and did a least squares curve fit to come up with the values. Once I had the values, I just printed them out and used them to set any temperature.

I don't know the range or tolerance you are after, but I just checked Ebay and they had "decade boxes" in experimenter quality starting at 99 cents to several hundred dollars for a NIST calibrated version. I'd pay $10 just to experiment. The 1st one that came up went in 1 ohm steps. If you are just proving an idea, that's probably good enough.
« Last Edit: August 09, 2010, 07:23:43 07:23 by LabVIEWguru » Logged
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