NSM wrote:
wrote in message
oups.com...


Can I get recomendations for the most accurate electronic timer that I
can buy?

It must to be accurate to within 1/60th of a second over the course of
6 hours.


You can pick up a Radio Shack Model 100 from $5 and up on eBay. There is
free software that will give you 8 separate accurate lap timers on that, one
for each function key. It runs off 4 AA cells.

N



6 hours would be 6 x 3600 x60 units = 1,296,000 or better than one part
in 10^6.

That is heading into TCXO crystal oven country.
Or possibly locking to a NIST radio source such as WWV or WWVB.

Or, at the very least, a calibration from a traceable source.

Loosen your spec.

--
Many thanks,

Don Lancaster
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
voice: (928)428-4073 email:

Please visit my GURU's LAIR web site at http://www.tinaja.com