Built a small temperature chamber using a Starbucks Refrigerator, Yokogawa Temperature controller, and PTC Heater (300 watt). It covers 0 degrees C to 55 degrees C and has an RS-485 interface to the PC. The compressor runs all the time, and the controller cycles the 300 watt heater as needed to stabilize the temperature. Here is a link to a YouTube video showing it:
https://youtu.be/ETj4owB3I0k Mitch -----Original Message----- From: volt-nuts [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, April 30, 2018 6:22 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] Ayrton Shunt does double duty. No environmental chamber yet, have a Yokogawa controller and and an EIS sensor simulator, going with a small box in the first for individual components, but workload keeping me from completion of so many fun projects. Now we are nearing grass cutting season here, the completion of projects ratio will suffer. George Dowell On 2018/04/30 03:11 PM, [email protected] wrote: > Much appreciated! I saw some of those units listed on eBay inexpensively and > was curious about such a "mod". Have you characterized it for tempco? > > Sent from my iPhone > >> On Apr 30, 2018, at 2:02 PM, [email protected] wrote: >> >> Leeds and Northrup Ayrton Shunt box Model 2664. >> >> Modified to do double duty as a precision resistor standard. >> >> Pictures here: >> >> http://www.qsl.net/k/k0ff/VOLT_NUTS/Ayrton_Shunt_Conversion/ >> >> Later I'll write it up and post it to that link as a PDF with text and >> pictures, plus any subsequent modifications. >> >> George Dowell >> _______________________________________________ >> volt-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
