Jules Richardson wrote:
I've had various multimeters over the years; the last two have a
frequency counter setting, which might sometimes come in useful - if I
knew how to use it :-)

The manual for the current one is no help. Is there some kind of standard
for what signal they're expecting?
....

General-duty multimeters will expect AC in the input range of the
multimeter. Certainly the specifications portion of the manual will
tell you the range you can expect.

It should also say whether it is "true-rms" or not--better meters such
as the Fluke or even some of the imports have internal circuitry/logic
that does some cleanup of distortion/clipped signals that affects not
only the displayed rms values but the frequency as well.

The question in the other subthread is "no"; it won't go "boom" unless
you connect to something that would make the meter go boom on the VAC
scale -- connecting in series would undoubtedly blow the input
protection fuse; whether it would be permanent damage would depend on
what was connected to and the meter design.

But, the other portion is that they are _not_ logic analyzers unless
have a specific feature other than AC frequency. You could undoubtedly
build a shaping circuit and make it work to measure the timing (that's
all a timing meter really is) but it won't work just as is for the purpose.

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