MAE ET300 Georesistivímetro multicanal de 24 a 48 canales

Referencia: ET300

Fabricante: MAE srl

Condición: Nuevo

Ventajas:
► Paralelización de medidas para configuraciones polo-dipolo, polo-polo, dipolo-dipolo y tridimensional

► Resolución de 24 bits

► Pseudosección en tiempo real

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GENERAL
ESPECIFICACIONES
Metodologías
modelos
Accesorios
Ficha técnica
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Tipo de Instrumento	Georresistivímetro

ET300 Data Sheet Descargar (2.48M)

Gama MAE Descargar (1.55M)

Ventajas de la arquitectura de adquisición de datos MAE ET300:

- Reducir drásticamente el tiempo necesario para completar un levantamiento.

- Posibilidad de abordar investigaciones que antes eran impensables, debido al elevado número de medidas requeridas

- Posibilidad de repetir las medidas varias veces para minimizar la incertidumbre, para el mismo tiempo empleado

- Menor consumo energético

- Registro de la desviación típica para cada medida

- Representación gráfica con barras de error de los puntos de medida

- Visualización en tiempo real de la pseudosección de resistividad

- Disponibilidad de una función de repetición automática de las medidas con un porcentaje de error superior a un umbral configurable.

El ET300 es un nuevo georesistivímetro compacto para prospecciones geoeléctricas SEV y multielectrodos con 24 o 48 electrodos.

La característica principal de esta instrumentación es la máxima versatilidad de uso combinada con la alta velocidad de ejecución de los estudios, tanto 2D como 3D. El ET300 se maneja a través de un ordenador portátil o tableta normal mediante conexión USB.

Está equipado con la función "vista previa" que permite al usuario visualizar una vista previa de la pseudosección derivada del tren de datos recién adquirido directamente en el campo. El uso de esta función permite al operador verificar inmediatamente los datos registrados.

La instrumentación realiza la medición o el ciclo de medición configurado por el usuario en modo automático.

Una vez concluido el ciclo de medición, los datos adquiridos se pueden visualizar inmediatamente utilizando la función "vista previa", cuyo uso permite al operador verificar inmediatamente los datos registrados y procesarlos con el software de procesamiento de datos relativo.

General:

Tecnología ADC: ADC Delta-Sigma de 24 bits

Número de electrodos: 24-48 (con 20 canales)

Configuraciones de matriz: 1D, 2D, 3D

Mediciones: Potencial propio, resistividad, polarización inducida.

Dimensiones: 40x33x17 cm

Peso: 6,3 kg

Compatibilidad de exportación: RESinv, ERTlab, ZondRES, MAE

Función roll-along: controlada por software

Pseudosección en tiempo real: 1D, 2D y 3D

Generador de secuencias: 1D, 2D y 3D

Caso: IP67

Condiciones ambientales: -20°C/90°C

Fuente de alimentación: Batería externa de 12 V, se sugiere 100 Ah

Consumo medio: 0,5A, hasta 50A pico

Salida:

Potencia de salida: 300W

Voltaje de salida: ±50V, ±100V, ±200V, ±400V, ±800V

Salida de corriente: hasta 6 A a 50 V, hasta 0,375 A a 800 V

Diagrama de potencia: Personalizado desde 250ms

Precisión: ±0.2μA

Precisión: <0,2%

Entrada:

Estrategia de mediciones: Paralela

Voltaje de entrada: ±25V

Precisión: 1,5 μV frente a escala completa

Precisión: <0,2%

Impedancia de entrada: 2,5 MΩ

Apilamiento y reducción de ruido: Hasta 255

Filtro de muesca de entrada: 50 Hz

Ajuste de potencial propio: Automático

Ventanas de IP: hasta 20 ventanas en intervalos de 20 ms

Multi-electrode Geoelectrical Prospecting+

This survey method calculates ground resistivity based on voltage difference (d.d.p.) measurements. The process involves introducing an electric field into the ground using current electrodes and measuring the d.d.p. at separate measurement electrodes. Using Ohm's second law, the resistivity value is determined, reflecting the intrinsic properties of the material. Since rocks are naturally resistive, variations in resistivity are primarily due to the presence of water in varying amounts.

In 2D-3D electrical tomography, electrode grids (16, 32, 64, 128, etc.) are fixed into the ground at regular intervals. These electrodes are connected to commutation boxes that automatically select the measuring and current electrodes, performing all possible combinations. The system generates numerous measurements based on the number of electrodes and the geometric configuration used. The tomographic inversion of this data produces a 2D or 3D reconstruction of the ground, allowing the identification of anomalies such as cavities, water bodies, and their shapes, sizes, and spatial distribution.

V.E.S. Vertical Electrical Survey+

This survey method aims to reconstruct a 1D electro-tomography at a specific measurement point. It involves the geo-electric technique, which experimentally determines the resistivity distribution that defines the electrical structure of a medium. In the SEV method, the distance between electrodes is gradually increased while measuring the ratio between voltage difference (d.d.p.) and current intensity. The resistivity values obtained are influenced by the properties of materials at greater depths, necessitating geometric corrections. This involves introducing factors dependent on the distances between the measurement electrodes (MN) and the input electrodes (AB). Depending on electrode positioning within the geo-electric field, different quadrupole systems, such as Wenner and Schlumberger, are used. The result is a 1D profile of ground resistivity at a specific location.

Induced Polarization Measurement+

Induced Polarization (IP) is an electrical phenomenon that occurs within material media. In the time domain, it is observed as chargeability, which happens when stress is released after the interruption of a step-type electric current. In the frequency domain, it involves the dispersion of electrical resistivity as the frequency of an alternating current changes. IP sources are primarily linked to redox processes at the interfaces between metal grains and interstitial fluids (electrode polarization). Another significant IP source is the accumulation of ions in moving electrolytes due to variations in mobility along the path (electro-kinetic polarization).

Through tomographic inversion of surface data, the resulting images reflect chargeability, enabling the identification of areas with potential hydrocarbon accumulations or other significant concentrations. Chargeability is directly proportional to the amount of charge stored by the lithotype, indicating the concentration of conductive materials in the multi-electrode area.

Spontaneous Potential Measurement+

The Spontaneous Potential (SP) method involves measuring potential differences on the surface that are associated with natural electric fields, which are linked to the underground flow of aqueous electrolytic solutions in porous media. By analyzing SP anomalies on the surface, the intensity and position of ionic charge concentrations of both polarities can be determined.

The test involves placing two electrodes: one near the measurement station and the other moved along subsequent stations on the line. Alternatively, both electrodes can be moved while maintaining a consistent interval between them, mapping the ground based on spontaneous potential variations. This method is particularly useful in mining for locating sulfides and graphite, as well as in archaeology. Underground water flows can be influenced by archaeological structures, which may act as drains or obstacles. By identifying SP anomalies, it is possible to indirectly detect these underground structures.