User's Manual

HVM200 Manual Glossary B-1
APPENDIX
B
Glossary
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
Aeq
1
T
---
a
w
2
ttd
0
T

=
Aeq 20Log
1
T
---
a
w
2
t
a
o
2
-------------
td Bd
0
T

=
2.8ms
2
Aeq
2
8hours