Profound VIBRA Series User manual

2.00
Profound
Limaweg 17
2743 CB Waddinxveen
P.O. Box 469
2740 AL Waddinxveen
The Netherlands
Tel: [phone]
Fax: [phone]
[email protected]
www.profound.nl
MANUAL PROFOUND VIBRA-range, software version 2.*
Version 2.00
January 2008

Manual Profound VIBRA-series, version 2.00 2
Contents
0Warranty, liability and service agreement...............................................................................4
1.0 Introduction............................................................................................................................5
2.0 Getting started.......................................................................................................................7
3.0 The VIBRA equipment.............................................................................................................9
3.1 Introduction .........................................................................................................................9
3.2 Connector ports of the VIBRA...............................................................................................9
3.3 Maintenance of the VIBRA..................................................................................................10
3.3.1 Replacing the batteries.................................................................................................10
3.3.2 Cleaning........................................................................................................................10
3.3.3 Calibration.....................................................................................................................11
4.0 Vibration monitoring with the VIBRA...................................................................................11
4.1 Preparation of the VIBRA....................................................................................................11
4.1.1 Positioning the geophone.............................................................................................11
4.1.2 Positioning the VIBRA ....................................................................................................13
4.1.3 Connecting geophone to the VIBRA...............................................................................14
4.1.4 Geophone detection and error messages ....................................................................14
4.2 Measuring with the VIBRA ..................................................................................................15
4.2.1 Switching on the VIBRA..................................................................................................15
4.2.2 Measuring with the VIBRA..............................................................................................16
4.2.3 Measurement duration..................................................................................................16
4.2.4 Switching off the VIBRA..................................................................................................17
4.2.5 Unmanned measurements with the VIBRA – Wakeup enabled.....................................17
4.3 Frequency measurements with the VIBRA-series ..............................................................18
4.4 Level and calibration check (VIBRA+only)........................................................................19
4.5 Intelligent data-reduction facilities.....................................................................................19
5.0 Description of the menu options .......................................................................................22
5.1 Option Vibra Info...............................................................................................................22
5.2 Option Start Measurement................................................................................................22
5.2.1 Available measurement information while measuring ..................................................23
5.2.1.1 Actual measuring values......................................................................................23
5.2.1.2 Maxima.................................................................................................................24
5.2.1.3 Measuring values in accordance with the governing code...................................25
5.2.2 Options while measuring ..............................................................................................26
5.3 Option Change Settings....................................................................................................27
5.3.1 Interval..........................................................................................................................28
5.3.2 Save Level....................................................................................................................28
5.3.3 Peak Type (VIBRA-sbr/VIBRA+-option) ...........................................................................29
5.3.4 Code (VIBRA+-option)....................................................................................................30
5.3.5 Alarm Level...................................................................................................................31
5.3.6 Smart Alarm (VIBRA+only)............................................................................................32
5.3.7 Alarm ............................................................................................................................33
5.3.8 Traces...........................................................................................................................33
5.3.9 On/Off ...........................................................................................................................34

Manual Profound VIBRA-series, version 2.00 3
5.3.10 Days (VIBRA+-option)................................................................................................35
5.3.11 Project ......................................................................................................................36
5.3.12 Exiting the Change Settings menu...........................................................................36
5.4 Option Date and Time.......................................................................................................37
5.5 Option Display Contrast....................................................................................................37
5.6 Option Erase Data.............................................................................................................38
5.7 Option Test Alarm.............................................................................................................38
5.8 Option Send E mail (VIBRA+-option).................................................................................39
5.9 Switching Off.....................................................................................................................39
5.10 Memory and battery ..........................................................................................................39
6.0 VIBRA PC software .............................................................................................................40
6.1 Unique license file.............................................................................................................41
6.2 Installation: PC software, licence file, driver......................................................................41
6.3 Processing measuring data...............................................................................................44
6.3.1 Downloading data.........................................................................................................44
6.3.2 Viewing data.................................................................................................................45
6.3.3 Exporting data (graphically and numerically)................................................................49
6.3.3.1 Graphical data export...........................................................................................49
6.3.3.2 Numerical data export..........................................................................................49
6.4 Programming and locking the VIBRA with the PC software................................................52
6.4.1 Settings.........................................................................................................................54
6.4.2 Locking functions..........................................................................................................55
6.4.3 VIBRA User ID................................................................................................................55
7.0 Wireless data transfer and e-mail alarm via GPRS (VIBRA+-option)...............................57
7.1 Installation of the SIM card in the VIBRA+.........................................................................57
7.2 Activating the mobile subscription: e-mail and GPRS settings .........................................58
7.3 Status and data per e-mail................................................................................................61
7.4 Troubleshooting concerning the e-mail function ...............................................................64
7.5 E-mail alarm function ........................................................................................................66
Appendix I Technical specifications........................................................................................68
Appendix II Signal flow chart VIBRA-series...............................................................................69
Appendix III Schematic overview e-mail alarm.........................................................................71
Appendix IV Schematic overview VIBRA USB plug (alarm connection)...................................72
Appendix V Recommended vibration criteria to avoid building damage..............................73

Manual Profound VIBRA-series, version 2.00 4
0 Warranty, liability and service agreement
Warranty
Profoundwarrantstheproductsthatitmanufacturestobe free from defectsin materialsandworkmanship
for a period of 1 year (one year) from the date of purchase. This warranty is limited to the original
purchaser ("Purchaser") of the product and is not transferable.
During the 1 year (one year) warranty period, Profound will repair or replace, at its option, any defective
products or parts at no additional charge, provided that the product is returned, shipped prepaid, to
Profound. The Purchaser is responsible for insuring any productso returned and assumes therisk of loss
during shipment. All replaced parts and products become the property of Profound.
This limited warranty does not extend to any products that have been damaged as a result of accident,
misuse, abuse, or as a result of service or modification by anyone other than Profound.
Except as expressly set forth above, no other warranties are expressed or implied, including, but not
limited to, any implied warranties of merchantability and fitness for a particular purpose, and Profound
expressly disclaims all warranties not stated herein.
Liability
In the event the product is notfree from defectsas warranted above, the purchaser'ssole remedy shallbe
repairor replacement as provided above.Under no circumstances will Profound beliabletothepurchaser
or any user for any damage, including incidental or consequential damages, expenses, lost profits, lost
savings, or other damages arising out of the use of or inability to use the product.
Maintenance & Service Agreement
The limited warranty period of 1 year (one year) can be extended by a Maintenance & Service (M&S)
Agreement between Profound and the Purchaser. This M&S Agreement contains repairs as warranted
above, free yearly calibration, software updates, minor hardware updates, technical briefings, etc..
Please contact Profound for additional information regarding M&S Agreements
Copyright © 2008, Profound. All rights reserved. No part of this documentation may be reproduced in anyform or
by any means or used to make anyderivative work (such as translation or adaptation) without written permission
from Profound.
Profound reserves the right to revise this documentation and to make changes in contentfrom time to timewithout
obligation on the part of Profound to provide notification of such revision or change. Profound provides this
documentation without warranty, term or condition of any kind, implied or expressed, including, but not limited to,
the implied warranties ofmerchantability and fitnessfor aparticular purpose. Profound maymake improvementsor
changes in the product(s) and/or the program(s) described in this documentation at any time.

Manual Profound VIBRA-series, version 2.00 5
1.0 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 intervalare stored together withthe 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+in accordance with DIN 45669, DIN 4150 - part 2 and 3, SBR - part A and B
• Each VIBRA system monitors the maximum /v/, maximum /a/ and frequency in the x, y, z-
direction per time interval. A VIBRA+also monitors the maximum /u / in the x, y, z-direction per
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.

Manual Profound VIBRA-series, version 2.00 6
• Professional and fast (graphical) presentation of the monitoring results.
• The possibility to attach an external alarm beacon to the system.
• Real-time interpretation and verification of the vibration levels against ruling codes.
• Easy comparison of measuring results: more than one VIBRA can be installed at the same
location and the units are easily synchronized.
Specific advantages of the VIBRA+
• Full compliance with DIN 4150 - part 2 and 3 including:
o Simultaneous measurements
o Dominant frequency determination with FFT method
o Software processing
o KBft and KBfmax
• Smart alarm (frequency dependent alarm)
• Daily status and data e-mail by GPRS/internet
• E-mail alarm
• Peak displacement recorded for each channel
• Automatic level- and calibration checks
Manual
Inthe next chapter of this manual you will find a short section about getting started. In chapter 3the VIBRA
equipment guidelines are given with regard to maintenance, exchanging batteries, etc. How to monitor
vibrations is explained in chapter 4. Chapter 5 gives a detailed description of the VIBRA menu options. In
chapter6 youwill finddirections for the processing of the measurement data. If you purchased a VIBRA+,
chapter 7 gives a detailed description of activating the data read-out by mobile connection. Please find a
short getting started in chapter 2.
Author: A.J. van Rietschoten, BA
To simplify reading, the manual uses the name VIBRA for each VIBRA model
(whether VIBRA, VIBRA-sbr, or VIBRA+) unless specifically mentioned.

Manual Profound VIBRA-series, version 2.00 7
2.0 Getting started
Before switching on the VIBRA it is important that the geophone already has been attached to the
measuring object and that the cable connector of the geophone has been connected to the VIBRA.
For a more detailed description we refer you to chapter 3 – 7 of this manual.
Switching on and measuring with the VIBRA:
1. Press ON.
2. Use the -keys to select menu-items and the 12-keys to activate a selected item. Use the
12-keys in a submenu to confirm or cancel choices and to change settings.
3. Check correct settings (Date and Time in the Main Menu, settings via the submenu Change
Settings).
4. Memory of the VIBRA should preferably be empty and the batteries full. If necessary, delete
data via the option Erase Data in the Main Menu and/or replace the batteries.
5. In the Main Menu select Start Measurement and press 2. The system will automatically start
measuring with the current settings.
6. Press 2Stop to end the measurement.
7. While measuring you can press 1Menu to enter the measuring menu.
Switching off the VIBRA:
• In the main menu press 1OFF to switch off the VIBRA
• In the measuring menu press 2STOP to end measuring, followed by 1OFF in the main
menu
• In a submenu like Change Settings, press 1twice to switch off the system
• While switching off the following message appears on screen 'Switching Off, Wakeup
Disabled'. If you have set an On/Off time,the system will mention this (see paragraph 4.2.5).
Monitoring measured vibration values, maximum while measuring
1. While measuring, the maximum / v / and / a / and the frequency are directly visible in x, y, z-
direction per time interval. The displacement option / u / is only available with the VIBRA+.The
system also displays date and time and visibly counts down the remaining interval time. Use
the /-keys to scroll and view the measured values.
2. Press to view the maximum value(s). These are the highest measured values since
measuring has been started or since resetting the maximum value(s). These values include
the frequency in the x-, y- or z-direction with date and time. The display of the maximal
displacements is only available in the VIBRA+.By pressing 2CLR , values shown are reset to
zero (without loss of data).
3. Press again to view the system information and the measuring values registered in
accordance with the governing code:
• the veff,max –values in accordance with SBR 2002 are shown (VIBRA-sbr only).
• the KB-values in accordance with DIN 4150 or the veff,max-values in accordance
with the SBR (VIBRA+only).
A data save level of 0.1 has been set for both the KB and the veff,max –measurement, as
specified in the respective governing codes. Measuring values below this threshold are not
saved and displayed as 0 in the PC software.

Manual Profound VIBRA-series, version 2.00 8
Options while measuring
While measuring you can press 1Menu to enter the following measuring submenu:
• VIBRA Info
• Stop Measurement : end the measurement
• Frequency : set the displayed frequency method
• Clear Maxima : reset all maximum values to zero
• Test Alarm : check correct functioning of the external alarm beacon
• Display Contrast : manually adjust the display contrast
• Send Email : manually send an e-mail containing the peak data (except
traces) to the preset address in the PC software
Except for the option Stop Measurement, entering these options will not interrupt the
measurement. Ending the measurement or resetting a maximum (only the maximum shown)
can also be done directly in the measuring menu.

Manual Profound VIBRA-series, version 2.00 9
3.0 The VIBRA equipment
3.1 Introduction
With the purchase of a Profound VIBRA the following items are
supplied:
• The VIBRA*: an aluminium IP65 protected casing, equipped
with a heavy-duty keyboard, anti-reflex display, ageophone
input and an USB output
• A Profound 3D geophone equipped with a cable and a plug
• A tripod and glue bracket with ball joint. The tripod makes it
possible to place the geophone solidly on a hard surface.
With the glue bracket the geophone can be attached to the
structure that has to be monitored
• 3 spare batteries size D, 1.5V mono-cell Alkaline batteries.
• A USB cable for communication with a Windows®2000/XP
computer
• A CD with the VIBRA PC Windows software and the manual
(in English)
• The unique license file of your VIBRA
• A screwdriver 120/220, 5.5 x 0.8
• A spanner/wrench 17 mm
• An Alan Key 2.5 mm (VIBRA+only)
• A transport case
* Please find an overview with the specific features of every type in appendix I. To simplify reading, the
manual uses the name VIBRA for every VIBRA model, unless specifically mentioned.
3.2 Connector ports of the VIBRA
The VIBRA has been equipped with two sockets on the right side:
• Theupper socket can be usedtolink the systemwitha Windows® computer via aUSB protocol.
On the front side of the VIBRA, to the left of the socket, the word USB is printed.
• The lower socket can be used to connect the geophone. Please find information on correct
connection in paragraph 4.1.3. On the front side of the VIBRA, to the left of the socket, the word
GEOPHONE is printed.
Whenthe VIBRA is used in the field, the USB socket should be closed with the cover. Covering thesocket
prevents moisture from entering the socket and possibly causing corrosion. Also it prevents sand, mud,
etc. from clogging up the socket.

Manual Profound VIBRA-series, version 2.00 10
3.3 Maintenance of the VIBRA
The VIBRA needs almost no maintenance. One of the design criteria was that no moving parts were to be
included in the VIBRA . Furthermore, every VIBRA is tested for at least 48 hourscontinuously, during which
all functions of the VIBRA are checked. Such a "burn-in" period guarantees you a good working product.
3.3.1 Replacing the batteries
TheVIBRA is powered by 3D-size1.5V mono-cell alkaline batteries. WhentheVIBRA has been operational
for a period of approx. 28 days, the batteries have to be replaced with fresh ones. If you measure with a
VIBRA+and have activated the e-mail function, this period is shorter (see paragraph 5.10).
Please use only alkaline batteries (no rechargeable or other batteries). Utilizing these latter types of
batterieswill result in false informationwith respect to the remaining batterycapacity(see paragraph 5.10)
and in a much shorter registration period of the VIBRA.
Replacing the batteries of the VIBRA is a simple operation and can be donewithout losing(program)data.
The following procedure should be followed:
1. Switch off the VIBRA.
2. Unscrew the 4 screws at the bottom side of the VIBRA using the screwdriver supplied with the
system.
3. Remove the blue bottom cover of the VIBRA.
4. Inside,thethree batteries can be easilyrecognized.Replacethe 3 batteries with freshones.Data
in the VIBRA will be preserved. Make sure that batteries are inserted in the same way (polarity)
that the old batteries were fitted in the holders.
5. Replace the bottom cover of the VIBRA. Please take care that the rubber sealing is still fitted
properly in the blue cover, thus ensuring the IP-protection of the VIBRA.
6. Fasten the 4 screws.
Please note: the battery contacts should be cleaned at least once a year. Remove empty batteries to
avoid leakage.
3.3.2 Cleaning
To clean the VIBRA, use a wet tissue or cloth. Do not use abrasive or aggressive cleaners that can
damage the keyboard coating.
Warning: Before opening the blue bottom part of the VIBRA in order to replace
the batteries, switch off the VIBRA. Violation of this procedure might result
in loosing all data and settings of the VIBRA.

Manual Profound VIBRA-series, version 2.00 11
3.3.3 Calibration
The VIBRA and the VIBRA geophone should preferably be calibrated once a year. The Profound M&S
agreement covers a yearly calibration of the system and its geophone.
4.0 Vibration monitoring with the VIBRA
4.1 Preparation of the VIBRA
Only a few checks have to be made before the VIBRA is ready to be used. Please take into account that
the positioning of the system and the measurement settings need to be based on the site conditions
(location, lay-out, vibration source, soil investigation results, buildings, damage and nuisance criteria).
1. Proper connection. The geophone should be connected to the VIBRA, as described in the
paragraphs 4.1.1 - 4.1.3. The USB socket should be closed with the coverin order to guarantee
the IP65 protection.
2. Battery/memory. The batteries of the VIBRA should preferably be full and the internal memory
should be empty. If necessary, erase the data via the Main Menu option Erase Data and/or
replace the batteries.
3. Settings. The settings, especially date and time, of the VIBRA should be correct. Check and if
necessary, adjust the settings in the Main Menu option Date and Time. Other settings can be
adjusted in the submenu Change Settings, as described in paragraph 5.3.
You can consider placing two systems and thus excluding local effects, as for example slamming a
door nearby or somebody hitting the geophone.
4.1.1 Positioning the geophone
You need to install the geophone properly in order to ensure accurate measurements of the vibrations in
the structure.
The proper mounting techniques to install the geophone are:
• Glue
Glue is the best way to mount the geophone bracket to the wall. Special 2-
component glues are available, which can be used to glue the geophone
bracket on almost any surface, as shown below. For optimum installation
the geophone bracket can also be screwed into the wall for extra security
during curing time.

Manual Profound VIBRA-series, version 2.00 12
Once the bracket is in place attach the geophone to the bracket, as
shown: - geophone
- glue bracket
- ring
- bolt
Use the spanner /wrench to secure the geophone with the bolt. The
ball joint of the geophone facilitates precise orientation of the
geophone.
Define the measuring directions. The most commonly used method
is: the x-axis parallel to the wall, the y-axis square to the wall. Use
the vial on the geophone to check that it is level.
If the activities will find place at different locations, it is practical to
mountadditionalbrackets to the wall beforethe measurements start.

Manual Profound VIBRA-series, version 2.00 13
• Tripod. On a hard, fairly smooth surface the tripod can be used to place the geophone. In
general, the registered vibration level is not affected by placing the tripod on the surface,
provided the accelerations are not too high. The DIN 4150 defines this as 3 m/s2at any
frequency below 100 Hz. The DIN 45669-2 gives more limitations.
• Geophone mounting plate. If you need to place the geophone on a floor with or without a
softtop layer, the Profound stainless steel mounting plate canbe usedin twopositions:with
the pointed side down (when used on a soft layer) or with the round side down (whenthere
is no soft layer). Thus, the mounting plate fully complies with SBR – part A 2002 and DIN
45669-2 June 2005.
Placing the mounting plate
1. Choose the side of the spikes, dependent on thesurface on whichtheplatehastobe
placed, as shown above.
2. Fully screw the three spikes into the mounting plate with the spanner, which is
delivered with the VIBRA. The spikes may never be used to horizontally position the
mounting plate.
3. Use the spanner to fasten the geophone with the ball joint on the mounting plate.
4. Placethemounting plate with the geophoneon the desired location and,ifnecessary,
further adjust the horizontal position of the geophone with the Profound balljointand the
spanner.
Due to the compact size of the VIBRA and its versatile mounting facilities for the geophone, installation of
the system normally does not take more than a few minutes.
4.1.2 Positioning the VIBRA
In the field, the VIBRA can be put down on the floor or ground surface or
attached to a wall.
At the right side of the VIBRA aKensington®anti-theft lock has beenfitted.The
system can be easily locked with the Kensington®security cable that can be
obtained at most computer shops.
geophone mounting plate

Manual Profound VIBRA-series, version 2.00 14
4.1.3 Connecting geophone to the VIBRA
The geophone is connected to the VIBRA by pressing the cable plug into the GEOPHONE socket. It is
important that the plug is placed correctly into the socket. The red markers on both the plug (dot) and
socket (line) facilitate this.
Make sure to align both markers before sliding in the plug. The plug should then be inserted into the
socket until the "click" is felt. The plug is now latched into the socket and will not unlatch by vibration,
shock or pull on the cable.
When required, the plug is disengaged by a straight axial pull on the outer release sleeve. This first
disengages the latches and then withdraws the plug from the socket. Never try to disengage the plug by
pulling the cable.
You can check correct functioning by switching on the VIBRA, followed by selecting and activating Start
Measurement, see also the next paragraph 4.1.4.
4.1.4 Geophone detection and error messages
Once the option Start Measurement is chosen in the VIBRA‘s main menu, the system will try to connect
with the attachedgeophone. On the screenthe following messages willbe shown: DetectingGeophone,
followed by Checking Geophone, and finally Reading Electronic ID. If everything is ok, the geophone
serial number and the three measuring channels (X:, Y: and Z:) together withthe messageOK appear on
screen. The system will then start measuring and at the end of the first measurement interval the peak
values will appear on screen.
X! Y! Z! – no geophone ID
In case no digital geophone-ID is detected, the VIBRA willdisplay an exclamation mark behindX, Y and Z.
TheVIBRA will then start or continue the measurementwith the default geophone ID-data,butwill not take
the specific geophone ID-data into account. The datafile willobviouslynot show theserial number of the
geophone. You can check this in the PC software, Start Measurement Info of the tab Saved Traces).
Therefore the measurement should be stopped as soon as possible and the connection between the
VIBRA and the geophone should be checked. Afterwards the measurement can be restarted.
Disconnected
If one or more measuring channels are not properly connected to the VIBRA, the system displays
Disconnected after the X, Y, and Z-channel.
In that case a mark is entered into the internal memory for each interval that no measurement could be
carried out. This also occurs when the geophone is disconnected (either by disengaging the geophone
plug or by breaking the geophone cable) during the measurement. This option provides the user with an
easy check to determine whether the VIBRA was able to carry out the measurements.
Please note that if you set a data save level, the memory of the VIBRA will be full earlier than expected
sincethe information of the non-connected channel cannot be screened and will be fully saved. Seealso
paragraph 5.3.2.
If the measurement has been started without connecting the geophone properly to the VIBRA, the above

Manual Profound VIBRA-series, version 2.00 15
message Disconnected will appear on the display. Connect the geophone to the system and depending
on the settings of the VIBRA, the topical vibration levels will appear on the display as usual.
Not Responding
A Not Responding channel of the VIBRA geophone is now defined as a special value and visibleboth on
the VIBRA display and in the data file. In the example below the geophone had been placed upside down,
both visible in the Not Responding message and the out of range velocity (traces).
X? Y? Z? – level check (VIBRA+)
At the start of each measurement the VIBRA+automatically performs a level check. If the geophone has
not been placed horizontally, a question mark willbe displayed on screenof the VIBRA+after the relevant
channel. Please end the measurement, correct the horizontalpositioningofthe geophone and restart the
measurement.
If the measurement has been continued anyway, the data file will display the measurement valuesof the
concerning channel as 0 or as a very low value.
4.2 Measuring with the VIBRA
4.2.1 Switching on the VIBRA
After installation of the VIBRA and the geophone as described in the previous paragraphs, the VIBRA can
be switched on by pressing the ON-key once. The Profound logo and the VIBRA type (VIBRA, VIBRA-sbr or
VIBRA+) will then appear on the display.
This information will remain on the display for approximately 1 second, after which it is replaced by the
first 4 options of the main menu. The main menu consists of the following 8 options:
• VIBRA Info
• Start Measurement

Manual Profound VIBRA-series, version 2.00 16
• Change Settings
• Date and Time
• Display Contrast
• Erase Data
• Test Alarm
• Send E-mail
The selected menu option is highlighted in thedisplay. By pressing the 2-keyOK the option is activated.
Use the -keystoselect other menu-items and the 12-keys to activate a selected item. The 12-keys
are also used in a submenu to confirm or cancel options and to change settings. By keeping the -key
pressed, the auto-repeat function automatically selects the next option.
Only the option Change Settings has an extensive submenu with options to program the VIBRA. Please
find a full description of the Change Settings menu in paragraph 5.3.
4.2.2 Measuring with the VIBRA
1. Press ON to switch on the VIBRA.
2. Check correct settings (Date and Time in the Main Menu, settings via the submenu Change
Settings)
3. The memory of the VIBRA should preferably be empty and the batteries full. If necessary,
delete data via the option Erase Data in the Main Menu and/or replace the batteries.
4. In the Main Menu select Start Measurement and press 2. The system will automatically start
measuring with the current settings.
5. Press 2Stop to end the measurement.
6. While measuring you can press 1Menu to enter the measuring submenu.
Please find more information about the measurement values in chapter 5,
specifically paragraph 5.2 and in chapter 2 (summary)
4.2.3 Measurement duration
The duration of the vibrationmeasurement(s) should belong enough tobe statistically representativeand
to ensure that the vibration measured is typical for the exposures that are being assessed.
When determining the measurement duration, it is important to analyse all of the tasks that are being
undertaken and any additional conditions that may affect the duration. Very often a complete exposure
consists of various periods with different characteristics.To fullyassess the exposure,separate analyses

Manual Profound VIBRA-series, version 2.00 17
ofthose periods may be required.Each time the duration of measurements shouldbe recorded in the final
assessment report.
Measurement duration ‘Vibration in buildings' - Effects on structures
The measurement duration should include periods during which the vibration source or sources to be
assessed, are operating. In general this is at least 1000 T, whereby T is the vibration time at the lowest
relevant frequency of the vibration.
In case of railway and traffic the measurement duration should preferably be a week.
Measurement duration ‘Vibrations in buildings - Effects on persons in buildings
The measurement duration should include the whole day, evening and night or at least a representative
period. When the vibration source is not active, the background vibration level should also be measured
in order to fully assess the exposure caused by the vibration source and also to be able to analyse the
difference in vibration intensity.
Please find more information about the desired duration of the vibration measurement in the applicable
standards.
4.2.4 Switching off the VIBRA
Ending a measurement and switching off the system:
• In the Main Menu press 1OFF to switch off the VIBRA
• In the measuring menu press 2STOP to end measuring, followed by 1OFF in the main
menu
• In a submenu like Change Settings, press 1twice to switch off the system
• While switching off the following message appears on screen 'Switching Off, Wakeup
Disabled'. If you have set an On/Off time,the system will mention this, as described in
paragraph 4.2.5
If possible, take a photograph of the measuring location. Finally, replace the system and the
geophone in the case.
4.2.5 Unmanned measurements with the VIBRA - Wakeup enabled-
An unmanned measurementis basically identicalto amanned measurement asfaras location and layout
of the system is concerned. You only need to:
1. program when the system should switch on and of (if applicable)
2. preferably lock the system partially or completely
The easiest way to program the VIBRA for an unmanned measurement is through the Change Settings
Dialog in the PC software, as described in paragraph 6.4.2. Locking the system can only be done via the
PC software in combination with the unique licence file of the system.

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Notification Wakeup enabled/disabled
If the VIBRA has been programmed with an on/off time and afterwards has been switched off by the user,
the system will not switch on automatically at the on-time. Before the system is switched off, the
notification Wakeup at 00:00? appears on the display, whereby the user has the option to activate the
on/off time.
Select OK to activate the on/off time. On the screen the notice Switching Off, Wakeup Enabled is
displayed.
Select Off to deactivate the on/off time. On the screen the notice Switching Off, Wakeup Disabled is
displayed.
Please note: if this notice is ignored or not noticed by the user, the system will switch on automatically
at the ON-time.
It is always possible to activate the time programming by switching on and off the VIBRA and then
assent the notification. Please find more information in the paragraphs 5.3.9 and 5.3.10 of this
manual.
4.3 Frequency measurements with the VIBRA-series
The VIBRA determines the vibration frequency in accordance with the applicable vibration code, using
either the ´Zero Crossing´ or 'FFT' (Fast Fourier Transform) method, as described in DIN 4150; or
according to Method I or II, as described in the Dutch code SBR. The method used depends on the
model:
• the VIBRA always determines the frequency with the 'Zero Crossing'-method.
• the VIBRA-sbr uses either Method I or II, since both methods are accepted under the Dutch SBR
guidelines. However, Method I is the preferred method.
• the VIBRA+uses either the 'Zero Crossing', the 'FFT' (Fast Fourier Transform) method, or
Methods I or II.
More information about the frequency methods can be found in the applicable standards.
When measuring you canselect in the measuringsubmenu of the VIBRA-sbr orVIBRA+the desiredmethod
for display. The preferred method is FFT and Method I respectively. Please note that the selected
frequency type will only be used for the frequency measurement as displayed on the screen. Both
frequencies FFT and Zero Crossing or Method I and II are available in the PC file. Please find more
information in paragraph 5.2.2.
Correctly applying FFT or Method I (VIBRA+ only)
In order to apply the FFT correctly, the proper building category (Cat. 1, Cat. 2 of Cat. 3) should be
selected before starting the measurement. Please select the category in the option Peak Type of the
Change Settings menu. Further explanation is given in paragraph 5.3.3.

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4.4 Level and calibration check (VIBRA+-option only)
At the start of each measurement the VIBRA+ performs an automatic level and calibration check. If the
VIBRA+ has been programmed with an on/off time, the system will also perform these checks every time
the system switches on and ‘continues’ the measurement.
If the geophone has been placed at an angle, a question mark will be displayed on screen of the VIBRA+
after the relevant channel. It shall be clear that the measurementsfor thischannelare incorrect. See also
paragraph 4.1.4.
The calibration check is saved with the measurement. This check does not replace the standard
calibration with external testing equipment, but is meant as external check of the measurement quality.
4.5 Intelligent data-reduction facilities
The VIBRA is able to monitor the vibration levels during a period of approximately 4 weeks. The VIBRA isa
fully digital system that samples the actual vibration amplitude level 1024 times per second in three
directions. This means that after a period of 4 weeks the VIBRA has collected over a billion samples.
If all these numbers, together with date and time information, were to be stored in the memory without
using any means of data reduction techniques, the VIBRA would have to be a much larger, inefficient
system. Therefore, the software of the VIBRA is equipped with means to achieve data-reduction without
loosing essential information:
1. Interval:with this option you can define a period in time (between 1 second and 15 minutes) during
which the maximum vibration levels are determined by the VIBRA. Only these peak values, together
with the date and time, will be stored in the internal memory of the VIBRA. Obviously, when a time
interval of only 1 secondis defined, the internal memorywill be filled much fastercompared to a time
interval of 60 seconds or 15 minutes (with the same level of vibration nuisance). The most
appropriatetime interval depends on thesource of vibration and the typeof measurement carried out.
See also paragraph 5.3.1.
2. Save level: this option is used to prevent the data storage of very low, insignificant, vibration levels
into the internal memory. You can define a data save level (threshold value) of say 0.1 mm/s. This
means that as long as the maximum vibration level during a time interval does not exceed this
threshold value, no data will be stored in the internal memory of the VIBRA, confirming that the
maximum vibration level did not exceed the threshold value during that time interval. For you it is not
important to know whether the maximum velocity level during this interval was 0.03 mm/s or 0.08
mm/s. See also paragraph 5.3.2. In the PC software these intervals will be displayed as a line at the
Save Level.
Please note:
- For traces the minimum threshold is 0.2 mm/s. If a higher value has been set via the
option Save Level, this also applies to the traces.
- Concerning the measuring values in accordance with the governing codes (DIN 4150
– part 2/ SBR – part B) and as prescribed in these codes the threshold is always 0.1
mm/s (see also appendix II).
- If the measured velocity values within an interval are below the Save Level, the a, f, u
will also not be saved.

Manual Profound VIBRA-series, version 2.00 20
3. On/Off:this option allows you to program the VIBRA to collect data only during those hours that you
find interesting. For instance, construction work ismostly carried outduring daytime. Withthe On/Off-
function, you can program the specific time interval when the VIBRA is to collect data. See also
paragraph 5.3.9.
4. Days (only available in the VIBRA+): with this option you can opt to switch off the VIBRA+
automatically during selected days. In general, construction work is not carried out during the
weekends.With this option you canfor example choose not to measureduringSaturday and Sunday.
See also paragraph 5.3.10.
Proper use of these data reduction options in the VIBRA ensures the continuous registration of the
vibration levels during the anticipated period of time without missing any essential information.
4.6 VIBRA PC Trace Recorder (VIBRA+-optie)
Withthe VIBRA+ connected to a PC/laptop you can generate and savea continuoustrace whenusingthe
PC VIBRA Trace Recorder program. The generated trace consists of the velocity values in X,Y,Z-
direction with a sample frequency of 1024 Hz/s.
Graphical display of a continuous trace as generated during a train passage
TheTrace Recorder program is part of the VIBRA PC software 2.* and will be automaticallyinstalledwith
the new VIBRA PC software.