Page 120
Function
Equation
Running rms
Velocity
(Metric)
If ‘Imperial’ or ‘g’ is
selected then the
default result is
displayed in Metric
Vrms
tv
( )
1
t
t
ta
( )
a
w
2
ta
( )
d
d
mms
1
t = instantaneous time (seconds)
= integration time of the measurement (seconds)
a
w
(ta) = instantaneous acceleration value
(ta), (tv) = time (seconds)
Running rms
Velocity
(dB)
Vrms
20 log
tv
1
t
t
ta
( )
a
w
2
ta
( )
d
d
dBref
dB
(
)
T = total integration time (seconds)
a
w
(ta) = instantaneous acceleration value
a
ref
= reference acceleration
(ta), (tv) = time (seconds)
Running rms
Displacement
(Metric)
If ‘Imperial’ or ‘g’ is
selected then the
default result is
displayed in Metric
Drms
td
( )
tv
( )
1
t
t
ta
( )
a
w
2
ta
( )
d
d
d
mm
(
)
t = instantaneous time (seconds)
= integration time of the measurement (seconds)
a
w
(ta) = instantaneous acceleration value
(ta), (tv), (td) = time (seconds)
Running rms
Displacement
(dB)
Drms
20 log
td
( )
tv
( )
1
t
t
ta
( )
a
w
2
ta
( )
d
d
d
dBref
dB
(
)
T = total integration time (seconds)
a
w
(ta) = instantaneous acceleration value
(ta), (tv), (td)= time (seconds)