Page 119
Function
Equation
Running rms
Acceleration
(Metric)
Arms
1
t
t
ta
( )
a
w
2
ta
( )
d
ms
2
t = instantaneous time (seconds)
= integration time of the measurement (seconds)
a
w
(ta) = instantaneous acceleration value
(ta) = time (seconds)
Running rms
Acceleration
(dB)
Arms
20 log
1
t
t
ta
( )
a
w
2
ta
( )
d
dBref
dB
(
)
t = instantaneous time (seconds)
= integration time of the measurement (seconds)
a
w
(ta) = instantaneous acceleration value
dBref = reference acceleration
(ta) = time (seconds)
Running rms
Acceleration
(Imperial)
Arms
3.28084
1
t
t
ta
( )
a
w
2
ta
( )
d
fts
2
t = instantaneous time (seconds)
= integration time of the measurement (seconds)
a
w
(ta) = instantaneous acceleration value
(ta) = time (seconds)
Running rms
Displacement
(g)
Arms
1
9.807
1
t
t
ta
( )
a
w
2
ta
( )
d
g
( )
t = instantaneous time (seconds)
= integration time of the measurement (seconds)
a
w
(ta) = instantaneous acceleration value
(ta) = time (seconds)
