Larson Davis HVM100, Manual

Page: 33 / 174

4/11/03 Tools Menu 3-3
nels will have the same units. The choices are: m/s
2
, cm/s
2
,
ft/s
2
, in/s
2
, g, and dB.
NOTE: The HVM100 uses a reference
acceleration of 10
-6
m/s
2
(velocity refer-
ence = 10
-9
m/s, displacement reference
= 10
-12
m) or a reference of 10
-5
m/s
2
(velocity reference = 10
-8
m/s, displace-
ment reference = 10
-11
m) to display
acceleration, velocity and displacement
in dB units. Please see the section in the
RANGE key for details on changing the
reference acceleration.
Integration
Hint:
This setting is in the Tools menu. To access the Tools menu press the
TOOLS
key and then use the
u
and
d
arrow keys to navigate
through the menu items.
NOTE: Integration is a mathematical
process of changing the displayed units
from acceleration to velocity to displace-
ment. Single integration changes the dis-
played parameter from acceleration to
velocity by dividing the acceleration
by:
2
π
f
(i.e. ft/s
2
to ft/s). Double integra-
tion changes the parameter from accel-
eration to displacement by dividing the
acceleration by:
4
π
2
f
2
(i.e. m/s
2
to
meters).
Integration applies only to the Vibration mode. There is no
integration available in the Hand Arm or Whole Body
Modes. Integration is the process of converting the data
from acceleration, which is the standard method of display-
ing the data, into velocity and displacement.
D i s p l a y U n i t s
m / s
2
D i s p l a y U n i t s
c m / s
2
D i s p l a y U n i t s
f t / s
2
D i s p l a y U n i t s
i n / s
2
D i s p l a y U n i t s
g
D i s p l a y U n i t s
d B
I n t e g r a t i o n
N o n e
I n t e g r a t i o n
S i n g l e