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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) x √2 is the formula with SmartVibro since the peak would be rms x √2 in sine wave.
Peak: Maximum value in the time-domain data.
V(t)
Peak
P-P
T
t1
t2
(rms)
2
V(t)
2
