Time Domain Central TEM Loop Transient Electromagnetic Mapping Subsurface Exploration Magnetic Survey Land Instrument Em Sounding Survey System
Power input: external DC high voltage input terminal. Input range is 12V~200V.
Fuse: 60A ceramic fuse. Follow the arrow on the front panel to loose and open its cover.
External control input: signal input terminal, receiver controlling transmitter frequency signal as well as synchronization signal.
Contrast adjuster: adjust the contrast ratio according to ambient temperature.
Charging/external battery 12V: socket for battery recharging or connecting to external 12V battery.
Power output A, B: transmitting power output terminal A and B, connecting to the two ends of the transmitting coil.
Power direction: give indication of power supply direction when transmitter is working.
Alarm: during transmitting process, if any fault exists, the buzzer gives alarm.
Power: power switch of the WTEM-1D transmitter itself. Switch to "ON" and it gets ready to work.
WTEM-2J receiver has to work together with a WTEM-1D transmitter to finish medium-deep or deep sounding; in the mode of GPS synchronization, a WTEM-2T/GPS synchronized controller is needed to synchronize WTEM-2J receiver and the transmitter.
PTT-40A Receiver Antenna & Adapter is a specific antenna (or receiving coil) designed for TEM system receiver, which consists of an detached antenna and adapter, with large equivalent area and high signal-to-voice ratio, easy for field layout and free from limitation of landform.
Loop applicable may be central loop or coincident loop, one TEM system transmitter working together with one TEM system receiver; or be large loop, one TEM system transmitter in association with several TEM system receivers. According to different
geological situations, user could choose an appropriate system to finish surveying tasks of quick general survey, 3D graph coloring up, deep mine finding.
It is mainly used for surveying metal mine, coal-mine, oil and gas field, geothermal field, and applies in hydrology and engineering geological prospecting as well.
| Number of channels: 1 channel (expandable to 3 channels) |
| Preamplifier gain: 8, 32 times |
| Main amplifier gain: 1,2,4,8,16,32,64,128 times |
| Pass band: 0 ~ 50KHz (linear phase filter), 0 ~ 400kHz for full pass. |
| Power frequency suppression: ≥ 80dB |
| A / d bits: 16 bits |
| Minimum sampling interval: 1 μ s |
| Total frequency difference of crystal oscillator: ≤ 5 × 10-9 |
| Number of channels: ≤ 128 |
| Stacking times: 1-9999 |
| Synchronization mode: cable synchronization |
| GPS + quartz clock synchronization |
| Power supply: built in 12V rechargeable battery (or external 12V battery), working time ≥ 10h |
PDA: Windows Mobile 6.0 system, 320 × 240 true color, 64MB flash ROM / 64MB SDRAM,
1GB CF card, can store data of no less than 100000 measuring points, Bluetooth, infrared, serial port. |
| Volume: 340 × 295 × 152mm3 |
| Weight: 5.3kg |
| Working temperature: - 10 ºC~ + 50 ºC |
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