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Chapter 11
Function Equations
The following table describes mathematically how the functions available on the
Excieo Vibration Meter are calculated. All calculations displayed are subject to
rounding and/or truncation.
Function
Equation
Acceleration
(Metric)
Aeq
1
T
0
T
ta
( )
a
w
2
ta
( )
d
ms
2
T = total integration time (seconds)
a
w
(ta) = instantaneous acceleration value
(ta) = time (seconds)
Acceleration
(dB)
Aeq
20 log
1
T
0
T
ta
( )
a
w
2
ta
( )
d
dBref
dB
(
)
T = total integration time (seconds)
a
w
(ta) = instantaneous acceleration value
dBref = reference acceleration
(ta) = time (seconds)
Acceleration
(Imperial)
Aeq
3.28084
1
T
0
T
ta
( )
a
w
2
ta
( )
d
fts
2
T = total integration time (seconds)
a
w
(ta) = instantaneous acceleration value
(ta) = time (seconds)
Acceleration
(g)
Aeq
1
9.807
1
T
0
T
ta
( )
a
w
2
ta
( )
d
g
( )
T = total integration time (seconds)
a
w
(ta) = instantaneous acceleration value
(ta) = time (seconds)
