PASI Polares 32 User manual

PASI
User manual
Polares 32
P.A.S.I srl – via Galliari 5/E – 10125 TORINO – Italy
Tel. [phone] – Fax [phone] - E-mail [e-mail]
www.pasisrl.it

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Contents
Contents.............................................................................................................................4
Important notice ................................................................................................................2
Warranty information and safety notes .............................................................................3
1. Introduction ...............................................................................................................4
Content of the manual ...................................................................................................4
2. Electrical imaging system for tomography Polares 32..............................................5
A brief introduction.......................................................................................................5
What is the difference with conventional DC electrical tomography? .........................5
Why is POLARES32 an innovative instrument? ..........................................................6
What are the main strengths of POLARES 32? ............................................................6
POLARES32 main features ..........................................................................................8
Automatic adjustment of current and voltage output values.....................................8
3. Mode of use.............................................................................................................10
Caution ....................................................................................................................10
Test plug to check operation of MPX and MPX extension cable ...............................11
Hardware and logic electrodes ....................................................................................13
4. Getting started .........................................................................................................19
Opening of a measurement template...........................................................................19
Moving on to the measurement session ......................................................................20
Execution of measurement sessions............................................................................20
Displaying and continuing a measurement session.....................................................21
5. Description of the Polares 32 programme...............................................................22
Main screen .................................................................................................................22
Templates ....................................................................................................................24
Templates selection and opening ................................................................................24
Templates display........................................................................................................25
Session parameters ......................................................................................................26

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Electrodes................................................................................................................ 27
Measurements ......................................................................................................... 27
Electrodes configuration ............................................................................................. 28
Measurements configuration....................................................................................... 29
Electrical parameters................................................................................................... 31
Moving on to measurement sessions .......................................................................... 32
Saving a template........................................................................................................ 32
Entering custom measurements from file ................................................................... 32
Format of the measurement input file..................................................................... 33
Measurement sessions................................................................................................. 34
Selecting a measurement session................................................................................ 34
Session display............................................................................................................ 34
Editing the parameters ................................................................................................ 35
Testing the electrodes ................................................................................................. 35
Performing and deleting the measurements................................................................ 36
Pseudo-section ............................................................................................................ 39
Save session ................................................................................................................ 39
Template management ................................................................................................ 40
Delete template ........................................................................................................... 41
Export template........................................................................................................... 41
Import template........................................................................................................... 41
Multiplexer test ........................................................................................................... 42
System......................................................................................................................... 42
Software upgrades....................................................................................................... 44
Insights........................................................................................................................ 45
Meaning of Sigma value ......................................................................................... 45
Format of the files used .............................................................................................. 45
Output GPD format................................................................................................. 46
Input and output BPD format.................................................................................. 46
Output TXT format ................................................................................................. 46
6. Appendixes ............................................................................................................. 48
Technical specifications.............................................................................................. 48

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GPD file format...........................................................................................................49
General structure .....................................................................................................49
File header ...............................................................................................................50
Electrodes table .......................................................................................................54
Measurements table.................................................................................................55

Important notice
All rights to this manual are owned solely by P.A.S.I. srl. All rights reserved. Copying
this manual (without the written permission of the owner) for printing, copying, recording
or by any other means, translating all or part of the manual into any other language,
including all programming languages, using any electrical, mechanical, magnetic, optical,
manual or other methods is prohibited.
P.A.S.I. reserves the right to change the technical specifications or functions of its
products, or to discontinue production of one of its products, or to discontinue support for
one of its products, without prior written notice and urges its customers to ensure that the
information available to them is valid.
P.A.S.I. software and programmes are supplied "as is". The manufacturer does not grant
any kind of guarantee including that of the suitability and applicability of a certain
application. Under no circumstances shall the manufacturer or developer of a programme
be liable for any damage caused by the use of a programme.
P.A.S.I. products are not designed to be used in any way or applied in any way other than
mentioned.
Torino, ITALY 2021
Copyright: 2021 P.A.S.I. srl

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Warranty information and safety notes
Read the instructions carefully before using the product:
- This instrument was designed and built to measure electrical resistivity in the soil for
geophysical/geological purposes. Please read this manual carefully before use.
- The warranty will be void if the product is not used according to the instructions in
this manual.
- The warranty will be void if the appliance is tampered with.
- The device must only be used in accordance with the instructions described in this
manual. Correct and safe operation can only be guaranteed if the instrument is properly
transported, stored and treated.
- To avoid damage, use only original accessories or those approved by PASI srl.
- The case containing the instrument is only waterproof when closed. Once the
instrument has been placed on the measurement site, it should always be adequately
protected to prevent it from being exposed to the elements (rain, snow, direct sunlight,
etc.). It is not advisable to install the instrument on a vibrating surface.

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1.Introduction
The Polares 32 instrument is a device made and assembled by P.A.S.I. srl, a leading
Italian company in the production of instruments for geology and geophysics.
This guide lists the technical specifications and explains how to use the device.
Adhere to these guidelines.
Content of the manual
•Chapter 2, Electrical imaging system for tomography Polares 32, contains a brief
presentation of the instrument
•Chapter 3, Mode of use, describes how to use the system from a hardware point
of view.
•Chapter 4, Getting started, describes how to perform some basic operations using
the Polares 32 system and its PC control programme, referring to the subsequent
chapters of the manual and allowing the operator to start learning about and using
the system.
•Chapter 5, Description of the Polares 32 program, describes the mode of operation
of the PC control programme and the use of the system controlled in this way,
illustrating in detail all the functions offered by the programme and their
interaction with the system.
•Chapter 5, Annexes, reports the technical characteristics of the system and the
definition of the proprietary GPD (Geophysics Pasi Data) format used for storing
the results of a measurement session on file.

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2.Electrical imaging system for tomography
Polares 32
A brief introduction
POLARES 32 is a lightweight, easy-to-carry and fast AC electrical imaging system for
tomography.
It is designed to accurately measure AC currents and voltages in order to provide the user
with apparent resistivity and phase values in the frequency domain.
It operates with an adjustable transmission frequency in the range of 7 to 125 Hz.
POLARES32 can be used in many applications: laboratory measurements, electrical
surveys, surface electrical resistivity tomography, 3D surveys, mobile surveys of canals,
lakes, sea, etc.
Access to POLARES32 functions is intuitive through the use of an external PC
(Windows™) connected via USB cable.
The use of an external Windows™ PC offers much longer battery life and improved
overall system reliability. Computer faults can be easily solved by replacing the PC,
software updates do not require delicate interventions on the instrument's firmware, and
the user can benefit from remote assistance from our company for fault diagnosis.
The communication interface is a USB port on the PC, through which the user can upload
measurement configurations, install new software versions, download measured data and,
in addition, connect a number of different devices (network interfaces, WiFi routers,
Bluetooth or GPS antennas, keyboards, etc.).
What is the difference with conventional DC electrical
tomography?
The use of Electrical Resistivity Tomography (ERT) for geology has been essentially the
same since its début, based on the original principles of Vertical Electrical Soundings
(VES): apply a direct current to two stakes inserted into the ground (current electrodes A
B or C1 C2) and measure the corresponding voltage between two others (voltage