Here here
Charles Perry said:
They work. However, as with any metering/monitoring device, the application
is what counts. What are you planning to do with it? Knowing that you will
get more meaningful answers. I have tested dozens of power quality
monitoring devices and many of them are great if applied correctly. None of
them work well in all situations. Simple as that.
Charles Perry P.E.
I have used Flukes 43's 43b's, ACE 4000, Multilins, BMI, Dranetz, as well as
Analyzers from CH and SqD. My favorite is the RPM, (approx $25000.00 with
all the toys and report writer) Charles is correct no one meter is good in
all situations. Disturbances can be micro, even pico seconds to sags and/or
swells. It really depends on what your looking for. Or what you think your
looking for. Power line disturbances can be very infrequent which requires
long periods of monitoring to determine what is happening.
Good luck