Escaped aborning. "Make your own" details added. > Anyway, I'm trying to get this thing into calibration as best I can. > My only other meter is a 3.5 digit Radio Shack meter that's at least > a > decade old, so it's not much good as a calibration reference. > > 0 V is pretty easy to obtain. Any creative ideas on how to get > other > reference voltages to calibrate this meter? Weston Standard Cell. About +/- 0.1% accuracy. Make your own (1967 style) http://www.il-st-acad-sci.org/transactions/PDF/6112.pdf Involves a few nasty chemicals but relatively easy to do. Making one would be something of an effort. Making many would not be too much harder. _____ Buy this one. Quick and far from dirty. If it still works. Saturated Weston cells tend to have constant voltage. Non saturated drift with time. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=29833&item=6528655550&rd=1&ssPageName=WDVW 5 days to go, $US9.99 and no bids. May be easier to find someone with an accurate meter :-) ______ Fascinating letter on Weston history http://weston.ftldesign.com/MulhernLetter/letter.htm RM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist