Profound reserves the right to revise this documentation or to make improvements
or changes in the product(s) at any time.
VIBRA geophone
Profound VIBRA geophone
The Profound geophone for the VIBRA range
has been designed for high-performance
vibration monitoring.
Advanced mounting
The ball joint in combination with the wall
bracket facilitates precise orientation of the
geophone in the correct x-, y- or z-direction,
as well as enabling fine tuning of the vial.
Digital ID
The geophone has an electronic datasheet,
which also includes the serial number.
Therefore, the source of measurement data
can always be traced.
High-performance
Besides continuously monitoring the x-, y-
and z-direction, the VIBRA also automatically
corrects the measurement data for the
individual sensitivity of each geophone
channel. This guarantees high-quality
measurements and performance.
Plus
The VIBRA geophone in combination with the
VIBRA
+
offers the following extras:
- Digital measurement of the geophone's
inclination, assuring that measurements
are carried out with a correctly
positioned geophone.
- Based on data from the electronic
datasheet, the VIBRA
+
not only corrects
the sensitivity, but also the resonance
frequency and the quality factor with the
help of digital correction filters.
More information about the Profound VIBRA
range can be found in the technical
specifications of the VIBRA.
Technical specifications VIBRA geophone
Channels 3 (x-, y-, z-direction)
Sensitivity 23.3 Vs/m
Resonance frequency (f
res
)
8 Hz ± 0.5 Hz
Output Resistance (R
out
)
330 Ohm
Quality factor (Q) 0.75
Distortion at 18 mm/s and 12 Hz < 0.2 %
f
res
within tolerance
< 15º
Sensitivity of the vial 53 arc minutes (R130 mm)
Electronic datasheet (ID) Serial number; calibration
date; sensitivity; f
res
; R
out
;
Q
Temperature range (operating) - 20°C to + 60°C
Protection rating IP65 according to
DIN 40 050/IEC 529
Size Ø 74 mm
Mass 0.48 kg
Moving mass 11 ± 0.5 g (each channel)
Extra on VIBRA
+
Inclination measurement
Accessories cable reel of 50 m
P.O. Box 469 Tel. + 31 182 - 640 964
2740 AL Waddinxveen info@profound.nl
The Netherlands www.profound.nl
VIB030/01/2006
Profound Vibration Monitoring
10
0
10
1
10
2
10
0
10
1
10
2
MEASURING RA NGE VIBRA
frequency [Hz]
velocity [mm/s]
Geophone f = 8 Hz Q=0.707
DIN 45669-1 calibration point
DIN 45669-2 free standing geophone a < 3m/s
2
and f < 100 Hz
Geophone displacement limit 0.8 mm
Geophone displacement limit 0.8 mm inclination 5 degrees
Vibra v
max
= 100 mm/s u
max
< 0.8 mm
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