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45
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VM-4424S/H Instruction Manual
(Compatible with Version 2.16 or later)
10. Definitions
rms: Root mean square. This is the square root of mean of the values x
i
2
, for a set of
measuring data
x
1
,
x
2
,
…
,
x
n
, namely
n
x
x
x
rms
n
2
2
2
2
1
+
+
+
=
ISO standard sets rms of vibration velocity as evaluation criteria of the vibration
velocity, which is also known as vibration severity.
EQP: Equivalent peak. Giving that a measuring data set is sinusoidal, EQP is calculated
Peak by following formula.
rms×
√
2
rms×
√
2
is the formula with SmartVibro since the peak would be rms×
√
2
in sine
wave.
Peak: Maximum value in the time-domain data.
T
t
1
t
2
rms
V
(
t
)
2
t
V
(
t
)
Peak
Peak to Peak
t
