Clem-V Underground Resources Electromagnetic Survey Instruments

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