■ Minimum measurable value (or threshold))
This the smallest measurable value.
Multimeter RMS RMS
Ua multimeter multimeter )
t
Sinusoidal signals
with component
^ ř
Accurate Accurate Accurate
0
w
i
Distorted sinusoidal signals
with component
[ *
Error
of30 %
by default
Accurate Accurate
0
w u
)
Distorted signals
with component
k \
\ W
Error
of30 %
by default
Error
by default
(depends
on Udc value)
Accurate
0
umlmx-
. For example, for ammeter, the upper limit the range its calibre A. For instrument providing good conversion linearity, may equal the
resolution.
An AVG-type instrument only capable giving correct results for pure sinusoidal signals. also the value measurement count quantification unit,
usually called the "unit".
■ Resolution
This the smallest measurable difference value. defined minimum measurable value and a
maximum measurable value
■ Rated calibre
An instrument's calibre the value the quantity measured which corresponds the upper limit the
measurement range.MULTIMETERS
Theoretical Introduction
Multimeters
A few definitions:
■ Measurement range
This represents the limits within which the digital instrument performs specified that the results are not subject
to rate error which higher than the maximum tolerated.
A TRMS (AC+DC) "true root-mean-square" multimeter capable measuring the RMS value signals,
whatever their shape and whether they include component not.
■ Root-mean-square value signal
This the value the (positive) signal producing the same heating when passes through specified
resistance
