Transient electromagnetic method has the following advantages
(1) because of its high construction efficiency, pure secondary field observation and sensitivity to low resistivity body, it has become the preferred method in the current coalfield hydrogeological exploration;
(2) transient electromagnetic method (TEM) is the most sensitive method to find low resistivity geological body in high resistivity surrounding rock, and there is no topographic effect;
(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 sounding are completed at the same time to provide more useful information.
| WTEM-2D/60 Transmitter | |
| Transmitting voltage | 12V~ 200 V DC |
| Transmitting current | ≤60A |
| Current measurement | |
| precision | 土1% |
| Power supply frequencies | Supplo.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 | 160ns (Pure resistance load) |
| Damping resistance | 10000 |
| Transmitting coil | 0.1km* 0. 1km single turn ~ 2km*2km single turn |
| Synchronization mode extemal synchronization | (cable, GPS, Quartz clock) |
| Power supply | internal 12V8. 6Ah rechargeable battery (or extermal 12V power supply) lasting for over 8 hours |
| Dimension | 486*392*192mm |
| Weight | 12. 7kg |
| Working temperature | -10°C~+50°C |
