PASI GEA24 User manual

PASI
User Manual
Seismograph GEA24
P.A.S.I srl –via Galliari 5/E –10125 TORINO –Italy
Tel. [phone] –Fax [phone] - E-mail [email protected]
www.pasisrl.it

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Table of Contents
1.Table of Contents
1. Table of Contents......................................................................................................3
2. Important Notice.......................................................................................................6
3. Warranty and safety instructions ..............................................................................8
4. Introduction.............................................................................................................10
Contents......................................................................................................................10
5. How to use..............................................................................................................12
Hardware elements .....................................................................................................12
Hardware Connection .................................................................................................13
Power supply...............................................................................................................14
6. Full description of graphical interface and functionality........................................15
6.1 Homepage ........................................................................................................15
6.1.1 Connecting the instrument Gea24 to the PC.............................................16
6.1.2 Setting the acquisition configuration template .........................................17
6.2 System Configuration.......................................................................................17
6.2.1 Configuration of linear measurement unit................................................17
6.2.2 Configuring geophones sensitivity unit of measure .................................18
6.2.3 Configuring SEG2 preferences.................................................................18
6.2.4 Configuration of the SEG2 file directory .................................................19
6.3 Configuring acquisition parameters.................................................................19
6.3.1 Configuration window of the lines (Lines configurations).......................20
6.3.2 Data collection configuration window (Acquisition configuration).........23
6.3.3 Geophone configuration Window.............................................................29
6.3.4 Viewing and changing the configuration of a single geophone (only for
GEA24 embedded PC)............................................................................................30
6.3.5 Changing parameters on all geophones ....................................................32
6.3.6 Saving a Configuration.............................................................................34
6.4 Acquisition Procedure......................................................................................34

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6.4.1 Geophone noise monitoring......................................................................34
6.4.2 Trigger Window........................................................................................36
6.4.3 The "Acquisition in progress" window.....................................................38
6.4.4 Stacking.....................................................................................................38
6.4.5 Display of acquired data............................................................................39
6.4.6 Applying filters .........................................................................................43
6.4.7 Stacking Configuration .............................................................................43
6.5 Data Backup .....................................................................................................44
6.5.1 Viewing and entering SEG2 parameters...................................................45
6.5.2 Entering the name of the SEG2 file ..........................................................46
6.6 Data and Configuration File Management/managing configuration and data
files 47
6.6.1 Viewing an SEG2 file ...............................................................................47
6.6.2 Eliminating the configuration template.....................................................48
6.7 Exporting data files (only for embedded PC)...................................................48
6.8 Software upgrade (only for embedded PC)......................................................48
6.9 Multiple passive acquisitions............................................................................49
6.10 Recovery after unexpected situations...............................................................50
6.10.1 Active acquisition with stacking...............................................................51
6.10.2 Continuous Passive Acquisition................................................................52
6.10.3 Multiple passive acquisition......................................................................52
Appendix A.....................................................................................................................54
Technical Specifications .............................................................................................54
Appendix B .....................................................................................................................55
How to place the piezoelectric shock sensor...............................................................55
Appendix C .....................................................................................................................56
Trigger connector........................................................................................................56
Appendix D.....................................................................................................................57
Connection schemes....................................................................................................57
48 Channel seismograph –12 Channels cables ......................................................57
48 Channel seismograph –24 Channels cables ......................................................58
Line Connections.....................................................................................................59

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Table of Contents

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2.Important Notice
All right to this manual are owned solely by P.A.S.I. srl. All rights reserved. The copying
of this manual (without the written permission from the owner) by printing, copying,
recording or by any other means, or the full or partial translation of the manual to any
other language, including all programming languages, using any electrical, mechanical,
magnetic, optical, manual or other methods or device is forbidden.
P.A.S.I. reserves the right to change the technical specifications or functions of its products,
or to discontinue the manufacture of any of its products or to discontinue the support of any
of its products, without any written announcement and urges its customers to ensure, that the
information at their disposal is valid.
P.A.S.I. software and programs are delivered “as is”. The manufacturer does not grant any
kind of warranty including guarantees on suitability and applicability to a certain application.
Under no circumstances is the manufacturer or the developer of a program responsible for
any possible damage caused by the use of a program.
P.A.S.I. products have not been designed to be used in any way or applications other than
those mentioned.
This guide refers to “GEA24” SW version 2.0.2, Firmware version 2.5, HW library version
2.6.
Torino, ITALIA 2016
Copyright: 2016 P.A.S.I. srl

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Important Notice

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3.Warranty and safety instructions
Read these instructions carefully before using the product:
-Warranty will be void, if the product is used in any ways that is in contradiction
with the instructions given in this manual.
-Warranty will be void if the seismograph has been tampered with.
-The device must be used only according to the instructions described in this
manual. Faultless and safe operation of the device can be guaranteed only if the
transport, storage, handling and operation of the device is appropriate.
-To prevent damage, use only original accessories or approved by PASI srl.
-The box is waterproof only if closed. When a suitable location has been selected
for the seismograph, it must be ensured that no water can get into the device under
any conditions. Direct sunlight is also to be avoided for long period. It is not
recommended that the seismograph is installed on a strongly vibrating surface.

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Warranty and safety instructions

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4.Introduction
The seismograph GEA24 is a device designed and assembled by P.A.S.I. srl, a leading
company in Italy in the production of instruments for geology and geophysics.
This guide details the technical specifications and how to use the device. Please follow
these guidelines.
Contents
Chapter 5, How to use - the system as regards the hardware.
Chapter 6, Full description of graphical interface and functionality- all the features in
detail offered by the system.
Appendix A, technical characteristics of the system.
Appendix B, how to place the piezoelectric shock sensor.
Appendix C, Trigger connector.
Appendix D, Connection schemes.

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Introduction

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5.How to use
Hardware elements
Gea24 consists of a control unit and one or two 12 channel seismic cables, equipped with
12 single takeouts and terminated with standard connectors Cannon NK2721C (cable
adapters with a 24 takeout land streamer are available on request).
The instrument's standard equipment includes:
- Control unit Gea24
- USB cable for PC connection
- Trigger System (geophone or piezoelectric)
- USB Stick Gea24 containing manual and software
- Registration card
You can connect Gea24 to a laptop or tablet PC via USB cable; the Gea24 is also powered
by the PC itself, so you do not need an external 12V battery.
The instrument is supplied with a USB key containing documents, manuals and the Gea24
management software to be installed on your PC (to run this, simply double-click on the
file name).
Two-unit Gea24 can be "serialized" to get a complete system of 48 channels, simply by
connecting them to two USB on the same PC.
Chapter 6 will explain in detail how to proceed with the configuration of one or both
instruments.

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How to use
FIGURE 1GEA24 CONNECTED TO A PC
Hardware Connection
Gea24 can be placed either at the ends or in the center of the spreading; the
patterns reported below simply represent the most common configuration.

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FIGURE 2GEA24 CONNECTION SCHEME
In addition to the seismic cables, to become "active" GEA24 must be connected to a
trigger or starter geophone using the supplied special connector.
Power supply
As indicated in Par.1.2, Gea24 is powered by the PC via the USB port; an external 12V
battery is not necessary.

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Full description of graphical interface and functionality
6.Full description of graphical interface and
functionality
6.1 Homepage
The homepage is the starting page of the Gea24 program which allows you to control all
operations:
-system parameter configuration (button 2, section 6.2)
-configuration of acquisition parameters and geophones (key 4, paragraph 6.3);
-implementation of a new acquisition (button 1, paragraph 6.4);
-file management shown in the system (key 3, paragraph 6.5);
-data transfer of files to an external USB drive (only for embedded PC) (paragraph
6.7);
-Updating the Gea24 software (only for embedded PC) (paragraph 6.8).
These features will be described in detail in the following sections, within this section
you will find the following:
-Connecting the Gea24 instrument to the PC (section 6.1.1);
-selection of a template of acquisition configuration and geophones previously
saved (drop down menu 5, paragraph 6.1.2).
Figure 3 shows the image of the homepage

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FIGURE 3HOMEPAGE
6.1.1 Connecting the instrument Gea24 to the PC
If the Gea24 system is managed by an external PC and the application management has
been installed, when you connect the instrument to the PC you can see the instrument
display, the configuration lines and to enable the key for new acquisition.
The connection of the instrument to the PC must be made using the appropriate USB
cable. The application will automatically detect the presence of the system and will show
the picture of the instrument on the GUI together with the hardware serial number.
If you connect two Gea24 tools there will be two images shown on the GUI with two
serial numbers. Tool number 1 will be the one with the lowest serial number, while tool
number 2 will be the one with the highest serial number.
NOTE 1: In order to carry out active measures the trigger must always be connected to
instrument 1.

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Full description of graphical interface and functionality
NOTE 2: After updating the Gea24 software on the PC, its first connection to the USB
might require a few seconds while the system is detected, as an update of the firmware
on Gea24 tool might be necessary.
6.1.2 Setting the acquisition configuration template
With the dropdown menu (5) shown in Figure 3, the operator can select the template to
use for acquisition configuration.
Gea24 requires that the acquisition template is always configured, in order to maintain
the set of configured parameters necessary. For this reason on the Gea24 system there
will always be a default template called "last-configuration” and the operator will not be
able to delete it.
The operator can view the parameters of the selected template as described in paragraph
6.3. It will also be possible to change the values of the parameters and save them with a
new name.
In the event that the operator has modified some of the template parameters without
saving the file, this configuration will be lost when a new change is made to the
parameters, or a new template is loaded. If an acquisition is made, the configuration will
be stored and maintained in the template "last configuration", so it can be reused later.
6.2 System Configuration
To open the System Configuration window, press the System button (2) in Figure 3.
The system configuration allows you to:
-configure the GUI language;
-configure the linear unit and the geophones sensitivity value;
-configure the preferences for saving data on SEG2 files;
-configure the save folder of file SEG2 acquired (for external PC system only).
6.2.1 Configuration of linear measurement unit
Gea24 can work with the MKS system of units and the imperial system. The units of
measurement are shown in Table 1

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Units
m
yd
ft
TABLE 1-LINEAR MEASUREMENT UNIT
The set unit of measure is used to enter and view the configuration values of the
geophones and the display of the signal transmission speed to the ground (see section
6.3.3).
The decision does not affect the storage of data within the SEG2 file because linear
measurements are always expressed in meters
6.2.2 Configuring geophones sensitivity unit of measure
This unit of measure is used in the process of configuring the geophones to provide the
right identification information or used on a single geophone to correctly interpret the
voltage values measured. The measurement unit is configurable at the system level, so
the sensitivity values of all the geophones must be inserted with the same units of
measure.
The units of measurement used are shown in table 2
Units of measurement,
sensitivity of geophones
V/(m/s)
V/(cm/s)
TABLE 2-GEOPHONES SENSITIVITY UNIT OF MEASURE
6.2.3 Configuring SEG2 preferences
The window allows you to enter your preferences for the string proposed by the Gea24
program as a default for the name SEG2 file storage of the acquired data. The following
information will assist the operator with the name of the file.
-File prefix: a code of 10 alphanumeric characters, defined by the operator;

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Full description of graphical interface and functionality
-Progressive number: a four-digit sequential number, automatically incremented
by the system when saved, if you press “reset number” you go back to zero;
-Default file name: by clicking the drop down menu you have various options to
name the file, a combination of the start date, start time acquisition (obtained from
the control PC) and progressive number;
-File extension (.seg2, .dat or .sg2). WARNING: the saved files will in any case
conform to the standards seg2 regardless of the extension adopted.
In any case, the operator will be able to make any modifications he considers appropriate
to the file name when saving an individual acquisition, including the complete
cancellation of pre-set string.
6.2.4 Configuration of the SEG2 file directory
The window allows you to select in which folder of the external PC the SEG2 files,
acquired from the system, will be saved.
Selecting the checkbox "Automatic creation of a folder for each day," the system will
create an additional folder within the folder you selected; the name given will have the
date of the day of the acquisition where all the scanned files of that day will be saved.
The configuration function for the SEG2 file folder is only for Gea24 system with external
PC.
6.3 Configuring acquisition parameters
To open the acquisition configuration window press "Acquisition Config" on the
homepage (Button 4 on Figure 3).
This operation allows you to:
-view the configuration parameters stored in the selected template in the dropdown
menu (5) when the "Config acquisition" key is pressed;
-modify the acquisition configuration parameters;
-save a new configuration of the acquisition parameters on a template so that you
can retrieve it later.
-The configuration of the acquisition parameters is divided into three main
windows in sequence, so as to manage through each window a group of
homogeneous information:

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-The first window allows you to configure the lines: enabling of geophones,
configuration of the order on the line and their polarity (paragraph 6.3.1);
-the second window allows the configuration of its acquisition parameters, such as
acquisition time or sampling frequency (paragraph 6.3.2);
-The third window enables the configuration of location and sensitivity of the
enabled geophones (section 6.3.3).
NOTE: The acquisition Configuration feature is available even if the Gea24 instrument
is not attached to a PC, as it works only on the PC configurations, without communicating
with the Gea24 instrument. The ability to configure the acquisition without Gea24 being
connected allows the operator to prepare the acquisition configuration templates well
before the acquisition and use the control PC only.
The three acquisition configuration windows are equipped with three buttons: "Main",
"Save" and "Ok", the following describes their functions.
-The "Main" button allows you to return to the homepage without saving the
changes made to the parameters.
-The "Save" button allows you to save the information on a template, so that the
configuration can be retrieved later using the pull-down menu on the homepage.
The operator will be asked to enter the name of the template on which to store the
configuration.
-The "OK" button allows you to return to the homepage and save the changes made
to the default configuration template "last-configuration". This configuration can
be called back to make variations or to carry out an acquisition, as for any other
template saved by the operator.
6.3.1 Configuration window of the lines (Lines configurations)
This window shows the Gea24 with two 12-geophones lines connected (Figure 4). The
operator can decide which geophone to use to acquire the signal.
Above you can see the line attached to the Gea24 left connector, the geophones are
numbered from 1 to 12 as indicated on the front panel of the instrument. Below you can
see the line attached to the Gea24 right connector, the geophones are numbered from 13
to 24 as indicated on the front panel of the instrument. The numbers shown next to each
checkbox refer to the position on the geophone line and will from now on be called
"physical geophone". On the left line the geophones are ranked in such a way that the
geophone further away from the connector of the line is physical geophone 1, the