These devices are primary standards; you don't need three; you probably don't even need two. If certain conditions are met, conditions you can check/verify, they will accurately generate the desired voltages.
What you will probably want are at least three good zener type voltage standards and a constant temperature environment. The three will serve as a day to day standard and reality check on the JJA. And you need to really learn how to operate the JJA standard, so you can detect and correct any problems. Joe Hobart Flagstaff, Arizona On 2/15/2014 1:17 PM, Gordon DeWitte wrote: > Clearly need three (or some higher odd number) so they can vote... > > Gordon > > > On Sat, Feb 15, 2014 at 2:51 AM, Poul-Henning Kamp <[email protected]>wrote: > >> In message <[email protected]>, >> Randy >> Evans writes: >> >>> We'll all probably want a spare unit also. >> >> Two, how can you know which one fails, if you only have two ? >> >> -- >> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >> [email protected] | TCP/IP since RFC 956 >> FreeBSD committer | BSD since 4.3-tahoe >> Never attribute to malice what can adequately be explained by incompetence. >> _______________________________________________ > _______________________________________________ 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.
