UTEM 4 Borehole - UTEM5 Receiver Description
The UTEM5 Receiver is a multi-component EM receiver capable of 3-component data acquisition from up to 3 transmitter simultaneously. It incorporates an improved pre-emphasis deconvolution (PED) and other new noise processing techniques, yielding a significantly improved noise performance. In addition to EM data processing, the UTEM5 Receiver automatically acquires magnetometer, tilt sensor, and monitoring parameters from the down-hole probe. All acquired data are in digital form.
The Rx input signal is a high speed serial code - encoded with loss-free data compression. The UTEM5 performs decoding, secondary decimation, PED noise processing, gate sampling, stacking, probe orientation, primary field reduction, data logging and user interfacing. Magnetometer, tilt sensor, temperature data, battery voltage, and other status information are automatically acquired as they occur in the data stream and used in orienting the probe.
The UTEM5 Rx has a integrated depth counter for automatic down hole data labelling. The Receiver can be connected to other compatible instruments for clock synchronisation and parameter transfer. There is an integrated data logger with non-volatile memory and a USB interface with both upload and download capability. Data dumping and uploading of geometrical data are done through the USB port. The geometrical data are stored in the receiver and used in the probe orientation and primary field reductions. A minimum curvature 3D hole trajectory is calculated from the raw dip and azimuth using a proprietary algorithm. All of this can be done live in the field and oriented/reduced profiles can be plotted on the receiver display.
The UTEM5 has extensive real time monitoring capabilities. Raw signal levels, down-hole settings and live-stacked channel data can be monitored. For quality control, the EM channel data can be monitored as multiple bar graphs mimicking analogue meters. The monitoring functions are controlled by rotary switches for easy scanning between channels, components and display modes.