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| Place of Origin | Chongqing, China |
| Brand Name | Gold |
| Model Number | WTEM |
Magnetic Survey Instruments for Water and Metal Mining
Transient electromagnetic method (TEM) is also called Time domain electromagnetic Method (TEM). It transmits a electromagnetic pulse into the ground by using an ungrounded loop or ground wire source. During the interval of the magnetic pulse, a coil or ground electrode is used to observe the secondary eddy current field.
Simply put, the fundamental principle of TEM is the law of electromagnetic induction. The decay process is generally divided into early, middle and late stages. The early electromagnetic field is equivalent to the high-frequency components in the frequency domain, which attenuates quickly and has a small skin depth. While the late component is equivalent to the low frequency component in the frequency domain, slow attenuation, large skin depth. The geoelectric characteristics of different depths can be obtained by measuring the change law of secondary field with time in each time period after power failure.
Application:
1. Surface detection of aquifers, fault water bearing, coal seam structure and subsidence
2. The water storage structure inside and outside the mining area and in front of the header is detected downhole
3. To detect the depth and occurrence of good conductive ore body, and to detect the structure of ore accumulation
4. Detect the old kiln and its water content
5. Engineering exploration and environmental exploration
6. Oil and gas exploration and so on
Techenical Specification
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Transmitting voltage |
≤200V3 |
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Transmitting current |
≤50A |
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Current measurement precision |
current range before power supply being cut off is 0~50A, display resolution is 0.01A. |
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Power supply frequencies |
0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz |
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Transmitting waveform |
+ON, OFF, -ON, OFF, equal width and dual polarity |
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Turn-off delay time |
1μs~1000μs |
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Turn-off time |
≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coils |
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Damping resistance |
1000Ω |
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Transmitting coil |
0.1km×0.1km single turn ~ 2km×2km single turn |
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Synchronization mode |
external synchronization (cable, GPS) |
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Power supply |
internal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
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Dimension |
525×436×217mm3 |
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Weight |
18.5kg |
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Working temperature |
-10°C~+50°C |
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Receiver |
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Number of channel |
1 |
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Pre-amplification gain |
8, 32 times |
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Main amplification gain |
1, 2, 4, 8, 32, 64, 128 times |
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Band-pass |
0~50k Hz (liner phased filter), full band-pass 0~400k Hz |
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Suppression |
80dB |
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A/D |
16 bit |
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Min sample interval |
1μs |
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Trace number |
≤128 |
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Stacking times |
1~9999 time |
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Synchronization mode |
internal 12V9.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours |
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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 |
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Ports |
Bluetooth, infrared and serial port |
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Dimension |
340×295×152mm |
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Weight |
5.3kg |
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Working temperature |
-10°C~+50°C |
Product Image
