> 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? Buy this. 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 :-) RM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist