WTEM-2Q Shallow TEM Magnetic System
WTEM-2Q time domain shallow TEM system is one of our latest researchers, with all functions and advantages of domestic and oversea shallow transient electromagnetic survey systems, integrated with WTEM-1J/GPS TEM system receiver and WTEM-1X low-power transmitter. It features high transmitting power, short turn-off time, high reliability, strong anti-interference performance (atmospherics, 50Hz or 60Hz industrial frequency interference), lightweight and low power consumption. According to different geological situations, user could choose an appropriate system to finish surveying tasks of quick general magnetic survey, 3D graph coloring up, stereo mapping, deep mine source detection and shallow electromagnetic sounding.
• Geothermal investigation |
• Metal mine, coalmine |
• Oil and gas field, geothermal field |
• Hydrology investigation |
• Engineering geological prospecting |
• Corresion detection of various metal pipelines |
• One instrument with multiple functions: this system is integrated with functions of a transmitter and a receiver, portable and simple in connection. The receiver alone could synchronize though cable, GPS and thus associated with the external high-power transmitter to fulfill deep exploration. |
• High reliability, low power consumption: refined receiver and circuitry, reasonable heat dissipating system design, sealed and rugged mechanical structure, ensuring high reliability, low power consumption and convenient operation. |
• Remote control: PDA based Bluetooth wireless communication technology enables it to control the receiver in 10 meters, such as setting parameters, starting measuring, transferring and displaying the measured results. |
• High anti-interference performance: program controls the filter to give accurate power supply frequency; besides, data stacking and software filtration also do good to this performance. |
• Multiple channels, high measurement accuracy: operator could set number of channel, linear or logarithmic; crystal oscillator accomplishes timing, with stable anto enable it to give accurate data. |
• Wide depth range prospecting: this system is equipped with high-power transmitter which could reach in meters to thousands of meters (deep exploration) |
• Friendly and powerful control interface: PDA controls and collects data from human-machine interface, such as parameters input, data display or storage, graph plotting, etc, simplifying fieldwork. |
• Short turn-off time: transmitter supports swift turn-off function, able to extend shallow exploration range. Short turn-off function provides software with accurate turn-off time |
Receiving | |
Number of channel | 1 |
Pre-amplification gain | 8, 32 times |
Main amplification gain | 1, 2, 4, 8, 16, 32, 64, 128 times |
Band-pass | 0~50k Hz (linear phased filter), full band-pass 0~400k Hz |
Suppression | ≥80dB |
A/D | 16bit |
Min sampling interval | 1μs |
Crystal oscillation frequency error | ≤5×10-9 |
Trace number | ≤128 |
Stacking times | 1~9999 time |
Synchronization mode | cable, GPS, GPS+Quartz clock |
Power source | Built-in 12V rechargeable battery lasting for over 10 hours. |
Tablet PC | Window 10 table PC |
Ports | Bluetooth, infrared and serial |
Transmitting |
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Transmitting voltage input | 12V, 24V |
Transmitting voltage |
5.5V~ 8V (transmitting voltage input 12V), adjustable; or 5.5V~20V (transmitting voltage input 24V), adjustable |
Transmitting current | ≤10A |
Current precision | ±1% |
Power supply frequencies | 4 Hz, 8 Hz, 16 Hz, 32 Hz |
Transmitting waveform | +ON, OFF, -ON, OFF, equal width and dual polarity |
Turn-off time range | 1μs ~ 100.0μs |
Turn-off time | ≤2.5μs (when transmitting current is 3A), transmitting coil is single-turn 40m×40m |
Transmitting coil | 5m * 5m single turn ~ 100m * 100m single turn |
Programmable damping resistance | 50Ω ~ 1600Ω, 50Ω step programmable |
Synchronization mode | external synchronization (cable) |
Other |
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Battery recharging | charging voltage 12V, charging current ≤1.5A, for no more than 6 hours (automatically monitored) |
Dimension | 486mm * 392mm * 192 mm |
Storage temperature | -20°C ~ +70°C |
Weight | 11.2kg |
Working temperature | -10°C ~ +50°C |
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TEM apparent resistivity pseudosection of a dam foundation in Yunan | Transient electromagnetic system in Mexico |