If you are measuring on circuits with high available current you might
appreciate the Fluke fuse. Particularly on a residential service and
many commercial/industrial locations you want a meter that is "category"
rated for the hazard of the location. Fluke will be rated (may not all
be rated for the most severe). I wouldn't bet HF is. You could wind up
wearing the meter. Fortunately that is not much of a hazard in a house
except the service panel. If you are using a meter for work it could be
an OSHA issue.
I suspect the HF meters also have fuses. What irritates me,
is that the fuses are twelve bucks each. I can buy the glass
car fuses for under a buck each, and the plastic push in
fuses, also under a buck. However, with the Fluke meter,
only a Fluke fuse will fit.
Having a fuse does not mean the meter won't explode on a high capacity
Glass fuses used in a car are probably rated 32V. The same size ceramic
body fuses might be rated up to 250V. None of them have an adequate
current interrupt capacity (for a short circuit). Buss FRN fuses are
rated for circuits with a source current capacity of 200,000A. That is
different from the fuse current rating, which might only be 20A. The
source current capacity ("available fault current") for a house is
Fluke fuses are high interrupt capacity.
On Sun, 29 Mar 2009 10:32:59 -0700 (PDT), svu geek
k stands for 1000
M stands for 1,000,000
For 2M (or 2 million), set the dial to 10M (or slightly higher). With
a digital readout, all you are doing is moving the decimal point. I
bought a Radio Shack multimeter 25 years ago, still going strong.
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