Summary of Contents for Geoscan MPX15
- Page 1 Instruction Manual MPX15 MULTIPLEXER Instruction Manual Version 1.4 November 2002 c 1996-2002 Geoscan Research. All rights reserved.
- Page 3 MPX15 Addendum Wiring Details Wiring details for the Parallel Twin mode have been changed since earlier versions of this manual were issued. New versions of figure 2-6, on pages 2-9 (for new PA5 frames) and C-3 (for old style PA5 frames) are shown in this manual.
- Page 4 The central beam should be treated with a mix of linseed oil and white spirits every 6-12 months, (or • more often depending on circumstances) – this will help to repel water and prevent waterlogging of the central beam which can be a source of measurement errors. Always use the white mud caps and grommet to keep mud away from the probe mounting position •...
- Page 5 Figure 1. Striping Defect visible in raw and high pass filtered data.
- Page 6 Figure 2. Low pass filtered data used for correction of striping defect. Figure 3. Data set with striping defect removed.
- Page 7 Method 2 A second example of the striping defect can be seen in the survey below. Noise spikes and striping defects running from left to right are visible, the latter especially so in the high resistance area to the right. Mean is 57 ohms and standard deviation is 7.5 ohms.
- Page 8 The processing approach described above has succeeded in reducing the striping errors and noise spikes substantially. Subtracting the final data set from original shows the spikes and striping errors removed – see plot below. You can see that the striping error changes in magnitude over the site and increases in magnitude over higher resistance areas - 1 ohm over most of the site but up to 10 ohms in the high resistance region.
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