| Customization: | Available |
|---|---|
| After-sales Service: | Provide for Transient Electromagnetic Equipment |
| Warranty: | 1 Year |
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Transient electromagnetic called Time-Domain Electromagnetic (TDEM), is the basic method applied for locating the massive sulphides, problems associated with geological structures, partly in oil-and-gas prospecting (specially to corroborate seismic data). Two variants are in common use: Stationary source and moving source. In stationary source TDEM profiling surveys a large loop is laid parallel to the strike of the formations/ targets and the Receiver is moved along the traverses to record the three components of the secondary induced magnetic field when the strong currents passing in the loop are switched off momentarily. In TDEM sounding the receiver records the transient decaying secondary magnetic field at the centre of the loop coaxially. Sophisticated software for processing profiling and sounding data is commercially available. In moving source both the transmitter and receiver are moving along the traverses.
Why use Transient Electromagnetics (TEM)?
Non-destructive, inductive method, of mapping conductivity/resistivity
Simple field set-up
Extremely responsive to, and can differentiate between, conductive bodies
Groundwater, mineral deposits and environmental change
Suitable for search, mapping and monitoring projects
Rapid measurement cycles
Depths of hundreds of metres can be investigated in minutes and whilst othersurvey methods would still be setting up
Applications of Time-Domain Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Resistivity Sounding Instrument for Unerground Exploration
1. Detect aquifers, fault aquifers, coal seam structures and subsidence at ground level
2. Downhole detection of water storage structures in and around the mining area and in front of the driving head
3. To detect the burial depth and occurrence of good conducting ore body, and to detect ore accumulation structure
4. Detection of old kiln and its water content
5. Engineering exploration and environmental exploration
6. Oil and gas field exploration
Specifications of Time-Domain Transient Electromagnetics (TDEM/TEM) Equipment Geophysical Resistivity Sounding Instrument for Unerground Exploration
| Transmitter | |
| Transmitting voltage | ≤200V |
| Transmitting current | ≤50A |
| Current measurement precision | current range before power supply being cut off is 0~50A, display resolution is 0.01A. |
| Power supply frequencies | 0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz |
| Transmitting waveform | +ON, OFF, -ON, OFF, equal width and dual polarity |
| Turn-off delay time | 1μs~1000μs |
| Turn-off time | ≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coils |
| Damping resistance | 1000Ω |
| Transmitting coil | 0.1km×0.1km single turn ~ 2km×2km single turn |
| Synchronization mode | external synchronization (cable, GPS) |
| Power supply | internal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
| Dimension | 525×436×217mm 3 |
| Weight | 18.5kg |
| Working temperature | -10°C~+50°C |
| Receiver | |
| Number of channel | 1 |
| Pre-amplification gain | 8, 32 times |
| Main amplification gain | 1, 2, 4, 8, 32, 64, 128 times |
| Band-pass | 0~50k Hz (liner phased filter), full band-pass 0~400k Hz |
| Suppression | 80dB |
| A/D | 16 bit |
| Min sample interval | 1μs |
| Trace number | ≤128 |
| Stacking times | 1~9999 time |
| Synchronization mode | internal 12V9.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
| Pocket PC | Windows Mobile 6.0 system with software such as Word, Excel, etc., 320x240 true color, 64MB Flash Rom/ 64MB SDRAM/64MB 2GB CF card, able to store over 200,000 readings of sampled data,2 original rechargeable batteries |
| Ports | Bluetooth, infrared and serial port |
| Dimension | 340×295×152mm |
| Weight | 5.3kg |
| Working temperature | -10°C~+50°C |
| 01 | WTEM-2J TEM Receiver |
| 02 | WTEM-2D 15KW TEM Transmitter |
| 03 | Win10 Tablet PC to control the TEM system receiver and the system |
PTT-40A Antenna & Adapter
WTEM-2T/GPS Synchronized Controller
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