BRUEL & KJAER 2512 - Page 7

USES:
• Measurement of vibratory
motion based on
standardised human
response criteria
• Measurements in the
design, development and
inspection of passenger
vehicles, tractors, earth-
moving equipment etc.,
and powered hand-tools
for increased comfort and
reduced fatigue
• Monitoring human
exposure to vibratory
environments
• Frequency analysis of
vibration together with
external filters
FEATURES (2512) :
• Whole-Body, Hand-Arm
and Motion Sickness
measurements, weighted
in accordance with
standards and
recommendations, with a
single portable instrument
• Digital readout of
percentage of permitted
exposure dose, equivalent
RMS exposure level (Leq ),
peak acceleration level
(giving crest factor) and
elapsed time
• X-Y-Z inputs and
appropriate weighting
• Analogue meter aids
signal monitoring and
m/s
2
to dB conversion
• Built-in battery or external
DC power supply
• Provision for connecting
external filters
• Analogue (AC and DC)
output for tape and
graphical recorder or level
analyzer
116-81
types 251 2 and 4322
Human-Response Vibration Meter
and Triaxial Seat-Accelerometer
Type 2512
~
Vibration .... .,
~
0 ,1 - 0,63 Hz
Motion Sickness
Z-His
··-
Comfort
Severe
Discomfort
Measurement
Start
Stop
-
L. Pre se t..../
• Digital data output via IEC
625 compatible interface
bus for automatic readout
of fu II data to
alphanumeric printer,
calculator etc.
FEATURES (4322):
• Detects vibration in three
mutually perpendicular
directions
• Built into a flexible rubber
pad for comfortable
seating
• Integral robust cable
The emergence of standards and rec-
ommendations specifying boundaries
for human exposure to mechanical vi-
brat ion has prompted the develop-
ment of the Human-Response Vibra-
tion Meter Type 2512, a single eas-
ily operated instrument designed spe-
cially
for mal<ing measurements in
accordance with these standards.
The
2512 includes comprehensive
measurement facilities enabling the
evaluat ion of "human " vibration as
covered by
current standardisation ,
Hand - Arm and Whole -Body including
Motion Sickness. The complex compu-
(
1--
:Vibration a..vet RMS
(H . A. Add 20 dB)
Owrloed
Eq . Elcp . %--e
Leq .__.
p-
Peak~
®•:
Elapsed
Minutes
I
..
28V
2mA
Briiel&tQ...
()i
Input
1 (X) 2 (V)
3 (Z)
1 2 3 Ref.
Seat-
090
:-:,,
Acce l-
eromater
J
4322
tation of level. frequency and time
factors is automatically carried out by
the 251 2 which displays either the
exposure dose, the equivalent contin-
ous vibration level. or the max. peak
vibration level.
Its .
small size and built - in battery
power supply make the 2512 ideal
for both field and laboratory use.
·
several vibration pick-ups are avail-
able
including Triaxial Seat-Acceler -
ometer Type 4322 which is specially
designed for
wh<;>le '-body measure -
ments .