Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument

China Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument, Find details about China Geophysical Exploration, Transient Electromagnetic Instrument from Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument

Model NO.
WTEM
Trademark
Gold
Transport Package
Export Case
Specification
ISO9001
Origin
China
HS Code
9015800090
Model NO.
WTEM
Trademark
Gold
Transport Package
Export Case
Specification
ISO9001
Origin
China
HS Code
9015800090
Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument Up To 1000m Deep Exploration Instrument  

Transient electromagnetic method (TEM) is a method of detecting dielectric resistivity by transmitting a primary pulsed magnetic field to the underground by an ungrounded loop or grounded wire source, and observing the secondary induced eddy current field in the underground medium by coils or grounded electrodes during the interval of the primary pulsed magnetic field. Its basic working method is to set up a launching coil with a certain waveform current on the ground or in the air, so as to generate an electromagnetic field in the surrounding space, and generate an inductive current in the underground conductive rock orebody: after power failure, the inductive current decays with time due to heat loss.
Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument




Deep TEM Exploration System

Medium-Deep/Deep TEM Exploration System is applicable to medium-deep/deep transient electromagnetic exploration, one of our latest researches, with all functions of transient electromagnetic survey system. It boasts high power, short turn off time, high reliability, strong anti-interference performance (against atmospherics, 50Hz or 60 Hz industrial frequency interference), lightweight and low power consumption.

Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument

Transient electromagnetic detection has the following advantages

(1) Because of its high construction efficiency, pure secondary field observation and sensitivity to low resistivity, it has become the preferred method in the current hydrogeological exploration of coalfields.

(2) Transient electromagnetic method (TEM) is the most sensitive method to find low resistivity geological body in high resistivity surrounding rock, and it has no topographic influence.

(3) Using the same point combination observation, it has the best coupling with the detection target, strong abnormal response, simple shape and strong resolution.

(4) Profile survey and bathymetry are completed simultaneously to provide more useful information.

Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument
 
  Transmitter
Transmitting voltage≤200V
Transmitting current≤50A
Current measurement precisioncurrent 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 time1μs~1000μs
Turn-off time≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coils
Damping resistance1000Ω
Transmitting coil0.1km×0.1km single turn ~ 2km×2km single turn
Synchronization modeexternal synchronization (cable, GPS)
Power supplyinternal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours
Dimension525×436×217mm 3
Weight18.5kg
Working temperature            -10°C~+50°C
 Receiver
Number of channel1
Pre-amplification gain8, 32 times
Main amplification gain1, 2, 4, 8, 32, 64, 128 times
Band-pass0~50k Hz (liner phased filter), full band-pass 0~400k Hz
Suppression80dB 
A/D16 bit
Min sample interval1μs
Trace number≤128
Stacking times1~9999 time
Synchronization modeinternal 12V9.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hours
Pocket PCWindows 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
PortsBluetooth, infrared and serial port 
Dimension340×295×152mm
Weight5.3kg
Working temperature-10°C~+50°C

Geophysical Tem Equipment Electric Magnetic Time Domain Transient Electromagnetic Instrument up to 1000m Deep Exploration Instrument