TDEM RECEIVER NordicEM24
EM Receiver and Tx Controller
User friendly, reliable and robust, Instrumentation GDD introduced the new leading-edge NordicEM24 8 channels, 24-bit EM Receiver for ground electromagnetic survey.
Developed during the last four years, it has been successfully field tested with different sensors; dB / dt (coil) and B-field (LT and HT squid, Fluxgate) by experienced geophysicists from a major mining company in different geological and meteorological conditions. Also, it has been developed for mineral exploration as well as groundwater studies and geotechnical investigations.
Features
- TDEM survey
- Detachable touch screen with on screen keyboard
- Commercial field surveys are being underway with LT squids
- Full waveform recording with 24-bit ADCs
- Up to 8 input channels with ADC and amplifier
- Download data via USB
- Display scope, stacked data, profiles and decays
- Post-processing data software: to view, validate and correct measured data
- Tested with different sensors : dB / dt (coil), B-field (LT et HT SQUID, Fluxgate)
- Standard ASCII data file formats: AMIRA format compatible with Maxwell® software
- Components and wiring built to work down to -40o C
- Integrated internal GPS antenna or crystal synchronisation between EM Receiver and Transmitter Controller
- Applications: base metals exploration (Cu, Ni, Zn, Pb...), groundwater exploration, geotechnical investigations, saltwater intrusion into aquifers research, contaminated water mapping (mine tailings) and other related fields.
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| Specifications – EM Receiver | |||
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| Total weight (including accessories and shipping box) |
20.4 kg | ||
| Total dimension (including accessories and shipping box) |
60 x 41 x 23.5 cm | ||
| Operating temperature range | -40° C to +50° C (-40° F to +122° F) |
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| Input channels | 3 channels / option : 8 channels on request | ||
| V Max input level | ± 3.28 V on gain de 1 ± 0.41 on gain 8 | ||
| Bandwidth | Up to 580 kHz | ||
| Sampling rate | 1.44 MHz per channel | ||
| Operating system | Windows Embedded Standard 7 | ||
| Time windows | Various standard windowing or use defined | ||
| Input impedance | 2 MΩ | ||
| Display | 10.4’’ SVGA Resolution (800 x 600), heater | ||
| Data storage | 64 GB SSD | ||
| Compatibility | Coil and drilling surface (Geonics), LT SQUID and HT SQUID (Supracon), HT SQUID (Landtem) and Fluxgate (EMIT) | ||
| Battery | Four Lithium-Ion batteries | ||
| Battery life | 11hrs of operations (with 3 active channels at 20° C) 7.5hrs of operations (with 3 active channels at -25° C) | ||
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| Specifications – EM-IP TX CONTROLLER | |||
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| Total weight (including accessories and shipping box) |
13.8 kg | ||
| Total dimension (including accessories and shipping box) |
53 x 38 x 21 cm | ||
| Synchronisation | GPS and crystal | ||
| Duty cycle | 50% | ||
| EM Transmitter compatibility | Geonics, Zonge, Phoenix, Crone (could be adapted to others) | ||
| Base frequency range | 0.03125 to 30 Hz (50 Hz or 60 Hz selection) | ||
| Battery | Two Lithium-Ion batteries | ||
| Battery life | 11hrs of operations (with 3 active channels at 20° C) 7.5hrs of operations (with 3 active channels at -25° C) |
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Sampling Rate |
1000Hz (one reading each 1 msec) |
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Input Current |
+ 40A |
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Accuracy |
≤0,5% |
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ADC Resolution |
24bits (5 µA) |
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GPS Timestamp Resolution |
0,1 µsec |
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