CLEM-ⅤHigh-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.

MainTechnical 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