Baseline Error Correction Methods
- Create Blank Correction File
- Formula Correction
- Combine a Penetrometer Calibration and Blank Correction File
The penetrometer parts, the mercury, and the sample are all affected differently by the pressures exerted on them during analysis. Each material compresses to a different degree and at a different rate. Also, the increasing pressure within the high pressure port can cause the temperature of one or more of these materials to rise.
As a result, analysis data may show intrusion where none actually exists. For example, if the sample compresses sharply at a given pressure (compared to the compression of the mercury at that pressure), mercury moves from the penetrometer stem into the sample bulb to fill the space vacated by the shrinking sample. This reduction in the amount of mercury in the stem is interpreted by the software as intrusion.
These baseline errors can be reduced or eliminated through one of two correction methods:
- formula correction, and
- blank correction
The correction method is selected in the Penetrometer Properties file and displays in the Sample file.
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