MAE C313SEV Georresistivímetro para mediciones Cuadripolares

El Georesistivímetro Digital se utiliza para los Estudios Eléctricos Verticales V.E.S.
Este equipo se caracteriza por su máxima resolución y precisión en los estudios geoeléctricos y por su gran rapidez de funcionamiento.
Una vez finalizada la adquisición de datos, se pueden procesar inmediatamente con el software de procesamiento de datos correspondiente.
La alimentación de funcionamiento se suministra mediante un paquete de baterías incorporado y está gestionada por un microprocesador capaz de proporcionar una amplia autonomía de adquisición de datos.
El registro y almacenamiento de los datos se realiza en un disco interno o en una memoria USB (suministrada).
El equipo está completamente computerizado y todas sus funciones operativas se seleccionan simplemente mediante un menú táctil en el monitor LCD de color de 7" con pantalla táctil integrada.

■ Número de electrodos: 4

■ Alimentación: Batería interna de 12 V, batería externa

■ Consumo medio de energía: 2,5 A, pico de 50 A

■ Autonomía media: 9 horas

■ Condiciones ambientales de funcionamiento: -20/80 °C

■ Resolución: 24 bit

■ Caja: Polipropileno, válvula de presión automática, IP67

■ Pantalla: LCD táctil integrada de 7"

■ Sistema operativo: Windows 10

■ Puertos: LAN, USB

■ Grabación de datos: SSD interno, memoria USB externa

■ Formato de datos: TSV, CSV, DAT

■ Dimensiones: 49 x 19 x 26,4 cm

■ Peso: 9,6 Kg

Corriente de salida:

■ Regulación: Automática 5 pasos

■ Intensidad máxima: 5A a 50V

■ Tensión de salida: ±50V, ±100V, ±250V, ±500V, ±800V

■ Potencia máxima: 250W

■ Tiempo de inyección: configurable desde 0,25 seg. (visualización gráfica de la onda)

■ Precisión de medida: ±0,2μA

 

Medición de potencial:

■ Rango: Auto rango

■ Medida: medida simultánea en todos los canales

■ Escala máxima: ±25 V

■ Impedancia de entrada: 2,5 MOHM

■ Filtro de frecuencia de red: 50 Hz

■ Protección: superior

■ Precisión de la medida: ±1,5 μV dentro del rango de ±25 V

■ Reducción de ruido: promedio de 2 a 10 medidas

■ Reinicio automático del potencial espontáneo: Automático

■ Precisión de la resistividad medida: ±0,5%

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.