for a while now i've been looking to buy a new stand alone amp meter to replace my malfuctioning(i think?) fieldpiece clamp for the hs36 true rms. found a nice little one that will check both ac and dc amps. then i noticed that you can check Hz with it as well. due to my own nietivity i was unaware you could test Hz with a clamp(i was working in the industial field up until a month and a half ago, doing mostly hydronic work. now i'm going back to residential/light commercial, so i didn't get to see alot of variable speed fans in the field).
my question is- which is the best way to check Hz on a variable speed fans, with a clamp or test leads from a true-rms dmm? what are your methods for checking the drives (from what i remember GE makes all the motors for a majority of the major manufacturers on the market, so i assume they all have the same plug/pin set ups) for speed issues or malfunctions? the outfit i'll be working for is a Bryant distributor.
thanks alot, always get good info from everyone on this site, very grateful for all the knowledge!
and GO DEVILS!