Geophysical Equipment Supplier: Products: Resistivity: Ohm. Mapper. Ohm. Mapper. New! A simple. coaxial- cable array with transmitter and receiver sections is pulled.
Thus, data collection is many times faster than. DC resistivity. Create Continuous Depth Sections Easily. Multiple passes with the Ohm.
Mapper, at different transmitter- receiver. Data collection. is continuous so the near surface is finely sampled, providing high. Superior Mapping Technology. The Ohm. Mapper's Data. Mapper console provides graphical display of both. View the last five profiles or scroll a window. There are no stakes.
- Very low frequency electromagnetic, magnetic, and induced polarization methods. The very low frequency electromagnetic resistivity data show high resistivity zones.
- 2 Airborne resistivity mapping An alternate method, using apparent resistivity estimates, reduces the effect of the primary field.
Fast Survey Operations. Operators can collect resistivity data as fast as they can walk, or. ATV, or other tow vehicle. Ohm. Mapper’s towable resistivity array. Accurate, High- Resolution Target Detection: The Ohm. Mapper provides high- resolution resistivity information for a.
Easy Operation: A compact unit and simple operation allows surveying by a single. Immediate Results: Operators can see what has been surveyed, any gaps in the survey,and. Ohm. Mapper’s real- time grid. Accurate Positioning: The Ohm. Mapper allows real- time acquisition of position information.
GPS interface. Groundwater Exploration. Detect geologic faults.
Detect fracture zones Image clay layers and aquitards. Find buried stream channels.
Locate likely aquifer structures. Trace salt- water intrusions. Minerals Exploration. Measure depth to bedrock. Detect mineralized zones. Find sand and gravel beds.
Define limits of clay and marble deposits. The Ohm. Mapper consists of an. An AC. current is coupled into the earth by the transmitter and measured at the. This measured voltage is proportional to the resistivity of. Apparent resistivity is calculated using. The Ohm. Mapper is designed to be pulled along the ground as a streamer.
Terraplus, Worldwide Geophysical Equipment Supplier,Geophysical Equipment sales and rentals, Borehole Systems and probes, GPR, Potassium magnetometers, resistivity. RESISTIVITY IMAGE LOGS: Quick. This is resolved through a point to point mapping of the resistivity traces into a.
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This design. increases the resolving power and productivity of the system relative to. DC resistivity systems. Data is logged using the Data. Mapper. Console. The Ohm.
Mapper receiver is connected to one of the console’s. Data are. graphically displayed in real time on the console screen.
At a sampling. rate of two times per second the Ohm. Mapper TR1 has a total storage. Data. Map software is used to download, edit, and process Ohm. Mapper data. and export it in standard format for inversion using commercial DC. Survey Types: Ohm. Mapper surveys are based on the in- line. There are three ways to view Ohm.
Mapper data depending on the method of. The simplest method is to keep a single, constant. N- spacing) as the. This involves resurveying a single profile line. By combining the two methods above, and collecting data from. D data set can be collected for processing in an appropriate 3- D.
Depth of Investigation: The depth to which Ohm. Mapper data can be. The practical distance at.
Typical depths of investigation are 1. Skin. depth effects on EM measurements often determine the practical limit of. The approximation. For example, in 1. Ohm- meter earth the. Current is thus coupled to the earth through the. A matched receiver, automatically tuned to the.
The receiver then transmits a voltage. After. downloading to a computer the Data. Mapper software calculates apparent. Specifications. Operating Principle: Constant- current, capacitively coupled, dipole- dipole resistivity.
Hz. Output Power: Up to 2 Watts. Output Current Maximum: 1. A. Output Current Minimum: 0. A. Receiver Specifications: Cable Lengths: 5m standard (x. Input Impedance: > 5 M Ohm. Measured Voltage Accuracy: Better than 3%.
Input Voltage Range: 0- 2 V RMS. Power Line Rejections: > 1. B. Dimensions: Console. Battery: 8 x 1. 3 x 2. Battery: 1. Internal battery backup for clock and non volatile RAM. Environmental: Temperature: - 2. C to +5. 0 C. Note: At less than - 1.
C the LCD screen must be kept warm.