Introduction - Profound VIBRA Series Manual

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Introduction

Measuring vibrations
Vibrations from pile driving, construction, road or rail traffic,
demolition works etc. can create nuisance or even cause
damage to buildings and sensitive equipment. These
vibrations are accurately quantified with a system of the
Profound VIBRA-range.
With the resulting data including measured vibration levels,
you can easily compare the level of vibration nuisance with
the governing codes and recommendations in the field.
The VIBRA continuously measures the vibration levels, and displays these measured values. At the
same time the peak (velocity, acceleration and displacement) values of the measured vibrations during
each specified interval are stored together with the dominant frequencies of the velocity channels. Alarm
levels can be set manually.
Peak values, including dominant frequencies, are directly stored in memory. Measurement signals are
then transferred by USB to a computer for further analysis. The software generates tables and graphs of
peak values and signals for use in reports. The data can also be exported in ASCII-file.
Reliable performance over time in rugged site conditions, with moisture, dirt, and vibrations, demands
much of a measuring system. Therefore, the durable, watertight, aluminium housing has been
provided with a heavy duty, specially coated keyboard. The system is light-weight, small, portable and
battery-operated. The VIBRA is powered by 3 standard (1.5 Volt) alkaline batteries, which is sufficient
for weeks of continuous and unattended operation.
VIBRA, VIBRA-sbr, VIBRA+
Profound has developed different VIBRA systems to meet the individual requirements of our clients
around the world. The VIBRA range comprises the Profound VIBRA, the VIBRA-sbr and the VIBRA + .
The different characteristics of the VIBRA, the VIBRA-sbr and the VIBRA + are further outlined in the
VIBRA features overview in Appendix I.
Advantages
The VIBRA is a break-through in the field of vibration monitoring due to the following characteristics:
•
Fully continuous and automatic registration of the vibration nuisance during a long period of
time.
• The VIBRA-series is in accordance with national and international standards, such as the DIN
45669, DIN 4150 and the SBR 2002 : "Vibration in buildings: Effects on structures / Effects on
persons in buildings"
- VIBRA in accordance with DIN 45669 and DIN 4150 - part 3
- VIBRA-sbr in accordance with DIN 45669 and Dutch SBR - part A and B
- VIBRA
• Each VIBRA system monitors the maximum /v/, maximum /a/ and frequency in the x, y, z-
direction per time interval. A VIBRA
time interval.
•
Unattended vibration measuring for weeks due to the high-tech, low power consumption
electronic design in combination with software intelligence.
•
Compact, robust field-computer that is very easy to operate.
+
in accordance with DIN 45669, DIN 4150 - part 2 and 3, SBR - part A and B
+
also monitors the maximum /u / in the x, y, z-direction per
Manual Profound VIBRA-series, version 2.00
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