Larson Davis HVM200 Reference Manual

HVM200 Reference Manual C-1
Appendix
C Glossary of Terms
The following table contains definitions and calculations for terminology used in the HVM200 manual.
Term Equation Description
RMS Acceleration
T= Integration time in seconds.
a
w
(t) = instantaneous acceleration.
t = Time, in seconds.
The Aeq integration time is from Run to Reset; the display is updated once per second.
RMS Acceleration in
Decibels
a
o
= reference acceleration, 10
-6
m/s
2
or 10
-5
m/s
2
(user selectable)
Allowed Exposure
Time
a
L
is user selectable.
A8Exp: a
L
typically = 5
A8Act: a
L
typically = 2.5
Aeq
1
T
---
a
w
2
t  t
d
0
T

=
Aeq 20Log
1
T
---
a
w
2
t 
a
o
2
--------------
t
d  Bd
0
T

=
a
L
m s
2

 
 
Aeq 
2
8hours

Larson Davis HVM200 Specifications

General

Brand	Larson Davis
Model	HVM200
Category	Measuring Instruments
Language	English