Heck a lot of the current quality DMM's will take this in stride... One of the tests we do when demoing meters (and I've seen it done commonly from reviewers) is to run a meter through the different feature settings while connected to the mains. Often we'll just dump the probes into the wall at 120VAC (or often 240VAC) then slowly turn the meters knob through all possible settings. Then run the knob back to off, remove probes from the wall and power the unit back on. If its not still working perfectly and within its calibration spec we won't buy them. Every Agilent and Fluke meter I've tried this with passed with flying colors.
~Brett (N7MG) On Sat, 2010-07-03 at 20:30 -0400, Don Wilhelm wrote: > Mike and Casey, > > DO NOT put an ohmmeter across the RS-232 pins if you value your > ohmmeter. You can use a voltmeter to see what the voltage levels are. > They should go from greater than 3 volts negative to greater than 3 > volts positive - the absolute value of the voltages could be as great as > 15 volts, but more likely 12 in a PC environment. > > 73, > Don W3FPR > > Mike wrote: > > If you can > > toggle RTS, you could put an ohmeter across the output and see if it > > changes state. > > > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
