The nice thing about the APC units is that they are close to free if you are already going to purchase a UPS.
I agree that something like the Dranetz 658 would be better, but a quick peek at eBay shows prices far beyond what I'm willing to pay. > What's the sample rate on your APC UPS? I don't know what the internal sampling rate is. The API is tell me the current voltage tell me the lowest voltage since the last time I asked tell me the highest voltage since the last time I asked I think I decided it's an 8 bit ADC so the resolution is far from wonderful. (The step size on a couple of handy readings in 0.7 volts. 8 bits gives a full scale of 180 volts.)) I have a hack that reads as fast as it can. If nothing interesting has happened, it adds a line to the log file every 5 minutes. If the min or max voltage has change enough, it logs a line now. That gives me reasonably accurate timing on short glitches without cluttering up the log file with noise. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
