CLEM-V High-power Multi-purpose Electromagnetic Survey System

Main Applications

• Exploration of deep metallic and non-metallic mineral resources

• Exploration of geothermal resources and groundwater resources

• Exploration of petroleum and natural gas resources

• Exploration of coal goaf, karst development zone and air defense      projects

• Active fault survey, and crust and earthquake research

• Exploration of roadbed and tunnel of highways and railways;

• Environmental pollution monitoring and detection

System Components:

·         CLEM-P30 high-power supply, CLEM-T30 high-power electromagnetic transmitter, CLEM-R5 array electromagnetic receiver, magnetic sensor, processing software, and related accessories.

Main Functions:

 Array type fusion detection in manner of natural field electromagnetic method and artificial field electromagnetic method, able to carry out :
◎Controlled source audio magnetotelluric method (CSAMT) 
◎Audio magnetotelluric method (AMT) 
◎ High-power time-domain induced polarization method (TDIP) 
◎ High-power frequency-domain induced polarization method (FDIP) 
◎ High-power spectral induced polarization method (SIP) 
◎ Complex resistivity method (CR)

CLEM-30T High-power Electromagnetic Transmitter

Features and Functions 
Multi-function transmitting: meeting high-power transmitting requirements of CSAMT, TDIP, FDIP, SIP, and CR; 
Single-frequency and multi-frequency power supply: multi-parameter measurement, improving work efficiency; 
Fully automatic frequency sweep power supply: automatic switching of power supply as per operating frequency setting, without human intervention;
High-precision GPS + oven-controlled crystal synchronization technologies: no time drift accumulation, achieving all-weather precise and synchronized power supply; 
CPLD based control technology: supporting upgrade of software and hardware. 

Main Technical Specifications

◎ Frequency range: 8000Hz ~ 1/128Hz 
◎ High density frequency: 20- frequency points for each frequency magnitude 
◎ Maximum voltage: 1000V 
◎ Maximum current: 30A 
◎ Maximum power: 30kW 
◎ Power waveform: multi-frequency, single-frequency 
◎ Operating modes: automatic or manual 
◎ Protection functions: overvoltage, overcurrent, overheating, short circuit 
◎ Synchronization accuracy: UTC ± 20nS 
◎ Power source: Diesel generator sets

CLEM-R5 Array Electromagnetic Receiver

Features and Functions

◎Multi-parameter measurement: able for measurement in methods such as AMT, CSAMT, TDIP, FDIP, SIP, and CR; 
◎Array observations: able for independent operation of single set, and array type ◎wireless networking operation of several sets; 
◎Automatic measurement: able for automatic measurement through all methods, thus to reduce manual operating strength, and improve work efficiency; 
◎Synchronization technology: high-precision GPS + oven-controlled crystal synchronization technologies, and no time drift accumulation, thus to achieve all-weather precise and synchronized measurement; 
◎Dual ADC: one high-speed and one low speed true 24-bit ADC respectively for each channel
◎FPGA based technology: supporting online upgrade of software and hardware.

Main Technical Specifications
◎ Frequency Range: 32kHz ~ 1/128Hz 
◎ Channel number: 1 to 8 optional 
◎ Controller: PC-104, 586MPU 
◎ Storage media: electronic disk (512M to 2GB optional) 
◎ Synchronization accuracy: UTC ± 20nS 
◎ Channel Gain: 1 to 256, autoranging 
◎ Control modes: local control or wireless control