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G-858 MagMapper


  

       G-858 Magnetômetro e Gradiômetro Portátil de Césio   

 
 


O G-858 MagMapper é um magnetômetro de alta sensibilidade, de amostragem rápida e que ‘caminha’. O seu console inclui uma interface gráfica que simplifica a operação e aumenta a eficiência da condução do levantamento e da revisão dos dados adquiridos. O G-858 pode ser operado em vários modos, o que permite que o operador desenvolva sua própria grade para o levantamento, de forma a atender às suas necessidades específicas. O operador pode ainda ver sua posição com relação à grade e o perfil dos dados, durante o levantamento. Funções como resolução da tela, alertas de áudio, frequência de amostragem e muitas outras podem ser selecionadas pelo operador.

Os dados adquiridos com o G-858 podem ser gravados de forma contínua ou pontual. A alta taxa de amostragem do instrumento, em modo contínuo, permite ao operador caminhar com passos rápidos enquanto executa o levantamento de cada área. A área levantada pode ser ampliada pela adição de um segundo sensor. A adição de um segundo sensor também permite a medição do gradiente do campo magnético.

 


 

G-858R

 


O G-858 foi projetado para facilitar a interface com computadores e periféricos. Embora a Geometrics prefira que seus clientes escolham e comprem os equipamentos de processamento de dados que prefiram, também fornecemos, a pedido e a preços bem razoáveis, estações de processamento de dados totalmente integradas aos instrumentos que fabricamos.

Vantagens:

O sistema G-858 é fornecido com um pacote básico de software de processamento, chamado MagMap.

O software MagMap2000 oferece as seguintes funções:

• Transferência de dados brutos para o computador do cliente
• Correções padrão para erros de posicionamento, transientes e variação diária do campo  
   magnético
• Exportação de dados posicionados e editados no formato X,Y,Z, coluna ASCII, para serem
   utilizados em outros sistemas de criação de contornos
• Sistema de mapeamento por coordenadas, no campo
• Alta sensibilidade: detecta, com facilidade, um único latão de aço a uma distancia de 3 metros
   do sensor
• Re-alimentação imediata para o Usuário: mostra em tela a grade de coordenadas, a direção
   do levantamento e 5 perfis empilhados de dados magnéticos
• Facilidade de operação: gera mapas impressos, minutos após a conexão com um computador
• Opções: Gradiometria vertical ou horizontal, posicionamento por GPS, registro externo dos
   dados e controle através do console

O sistema MagMap do G-858 é composto por um console provido de tela e gravador, suspenso por tiras e conectado a um sensor de césio montado numa haste com contrapeso para facilitar sua utilização manual. O console contém circuitos eletrônicos para a aquisição de dados magnéticos obtidos em campo e automaticamente posicionados, que são mostrados numa tela LCD para revisão e edição. A memória do console tem capacidade para armazenar grandes volumes de dados. Ao fim do levantamento os dados são transmitidos, em alta velocidade, para um computador, para análise detalhada.

 




 


 

  download  prospecto G-858                   

 
 

     
Specifications:

 
 
Operating Principle:Self-oscillating split-beam Cesium  Vapor (non-radioactive Cs133) with automatic hemisphere  switching. Heading  Error:+/- 1 nT
Operating Range:17,000nT to 100,000 nT Gradient  Tolerance:> 500 nT / inch; >20,000nT / meter
Operating Zones:For highest signal-to-noise ratio, the  sensor long axis should be oriented at 45o , +/- 30o to the earth's  field angle, but operation will continue through 45o, +/- 35o. Data  Storage:Nonvolatile RAM with capacity for 8 hrs. of Magnetometer time, event marks,  field notes,  location, or 3 hrs. of Gradiometer and GPS at maximum sample rates.
Sensitivity:90% of all readings will fall within the  following  Peak-to-Peak envelopes:
  1. 0.05nT at 0.1 sec cycle rate
  2. 0.03nT at 0.2 sec cycle rate
  3. 0.02nT at 0.5 sec cycle rate
  4. 0.01nT at 1.0 sec cycle rate

Visual  Display:A 320x200 graphic LCD, daylight visible with selectable outputs for:

  1. Data display
  2. System setup functions
  3. Survey setup functions
  4. Survey monitoring
  5. System diagnostics

Data Output:  Three wire RS232 standard serial port,   optional continuous real time transmittal of data via RS232 to PC. Total memory output  transfer time less than 5 minutes at 115,200 baud

Battery  Life:

     

  1. 24 VDC rechargeable gel cell, 6 hrs. Magnetometer or 3 hrs. Gradiometer usage.
  2. Internal backup battery for clock and nonvolatile RAM

Operating Temperature:-25o C to +50o C (-13o F to +122o F

Water  Tight:To 3 ft. (0.9 m) depth

Shock:Drop 3 ft. on a hard surface without damage.

Console  Magnetic Effect:Less than 1nT at 4 ft. from sensor.

 

             G858________                gradiometer - application note
 

 
 

Principal | Produtos | Prospectos | Fale Conosco

      Copyright © 2005 Alpha Geofisica  -  Brasil   

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