Larson Davis HVM200, Справочное руководство

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HVM200 Reference Manual C-2
Energy Equivalent
RMS Acceleration
The HVM200 measures the following quantities:
Exposure Points
(P
E
)
a
w
= the vibration magnitude in m/s
2
.
T= the exposure time in hours.
k = the multiplying sum factor for the individual axis.
a
exp
= the exposure action value.
The summation measurement exposure points will be the maximum of the three axes exposure
points.
Running RMS
Acceleration
LINEAR

Integration time, in seconds.
t
o
= Observation time
The linear Arms integration time is controlled by the Averaging time setting; a new linear Arms
value is calculated and displayed at the end of each integration period.
Term Equation Description
A
8  
1
8
Hours
------------------- aw
2
t
 
t
d
0
T

=
A 4  
1
4 Hours
-------------------
aw
2
t   t
d
0
T

=
A
2  
1
2
Hours
------------------- aw
2
t
 
t
d
0
T

=
A 1  
1
1 Hours
-------------------
aw
2
t   t
d
0
T

=
 





P 100
E
ka
a
T
hours
2
8
w
exp
Arms
1

---
aw
2
t
 
t
d
t
0

t
0

=
-