also see:
Field Sensors
& Related Case Study |
| ground, resistance, depth sounding, Resistivity, depth, sounding, profiling, geothermal, Groundwater, mineral, prospecting, geophysical, structure, monitoring, earthquake, prediction, earthquake prediction research, environmental, natural resource, equipment, detection, borehole, consulting, drilling, mining, gpr, resistivity, magnetometers, radar |
| General |
| The MTU is a lightweight 24-bit data acquisition unit with
low power consumption, designed to operate in rugged environments.
Its main applications are |
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 | Resistivity depth sounding and/or |
| Profiling for oil/gas, |
| Geothermal, |
| Groundwater, |
| Mineral Prospecting; |
| Deep geophysical structure monitoring for earthquake prediction
research; |
| Environmental and natural resource monitoring and management. |
|
| ground, resistance, depth sounding, Resistivity, depth, sounding, profiling, geothermal, Groundwater, mineral, prospecting, geophysical, structure, monitoring, earthquake, prediction, earthquake prediction research, environmental, natural resource, equipment, detection, borehole, consulting, drilling, mining,
gpr, resistivity, magnetometers, radar |
| In general, a group of MTUs is deployed simultaneously,
all units are synchronized to ±1 microsecond by time signals broadcast
by satellites of the GPS (Global Positioning System); all units
start/stop data acquisition at a pre-programmed date/time. The MTU data
acquisition units measure up to 2 components of electric field (MTU-2E);
up to 3 components of magnetic field (MTU-3H), or both (MTU-5). The data
acquisition units can be combined in any proportion, in any
configuration and at any spacing from tens of meters (fine detail) to
tens of kilometers (wide reconnaissance), either along profiles (2-D) or
grids (3-D). Although cable links are optional, in general the MTU is
operated in stand-alone mode for data acquisition (no cable links) to
avoid the problems associated with cables. The MTU-CL is specialized
version which does not perform data acquisition, but instead uses the
GPS time to provide precision timing signals to other instruments. |
| ground, resistance, depth sounding, Resistivity, depth, sounding, profiling, geothermal, Groundwater, mineral, prospecting, geophysical, structure, monitoring, earthquake, prediction, earthquake prediction research, environmental, natural resource, equipment, detection, borehole, consulting, drilling, mining,
gpr, resistivity, magnetometers, radar |
|
Specifications
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| Number of Channels : |
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1 to 5 |
| Input range : |
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25mV,..., 1200mV with practical dynamic
range of 130dB |
| Input Impedance : |
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> 1 Megohm |
| Frequency range: |
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1/2000 Hz to 1K Hz (MT), l Hz to l0k
Hz(AMT. CSAMT options), 0.25ms to 16 sec windows (LowTEM options) |
| Power line Filtering : |
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digital notch at all odd/even, harmonics
better than 40dB |
| Other Filtering : |
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low pass, high pass, bandpass, etc |
| Timing accuracy: |
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better than ±1 microsecond, locked to UTC
(very high stability oven controlled oscillator synchronized to GPS) |
| Calibration : |
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automatic self calibration for box and
external sensors |
| Processor : |
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16-bit CPU for control functions, 24-bit DSP
for high speed processing, On board GPS receiver for timing &
positioning |
| Memory : |
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flash memory 2Mb to 32Mb larger memory on
request |
| ADC : |
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24 bits (MT. LowTEM) 18 - 20 bits (AMT. CSAMT options) |
| Data Transfer / Set Up : |
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to PC via fast parallel port on site or in base camp. |
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Mechanical
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| Dimensions : |
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230mm x 225mm x 110mm. |
| Weight : |
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Approx. 4kg |
| Case : |
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Die-cast aluminum, environmentally sealed. |
| Input Power : |
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Any suitable 12V battery |
| Controls : |
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On/Off switch |
| Indicators : |
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high visibility LED to signal operating
status (GPS lock. acquisition status, etc.) |
| Connectors : |
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external battery; GPS antenna; magnetic
sensor input; parallel I/O port; ground; electric field (binding posts) |
| Power Consumption : |
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9 watts |
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| Environmental |
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Operating range -20oC to +50o suitable for transport in bush vehicles &
operable in light rain.
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ground, resistance, depth sounding, Resistivity, depth, sounding, profiling, geothermal, Groundwater, mineral,
prospecting, geophysical, structure, monitoring, earthquake, prediction, earthquake prediction research, environmental, natural resource, equipment, detection, borehole, consulting, drilling, mining,
gpr, resistivity, magnetometers, radar