Data Reduction - Geosense MEMS DPI I Instruction Manual

MEMS Digital Portable Horizontal Inclinometer
V1.1
09/02/2022
The following figure (Figure 36: Format of raw .csv file format from export) shows the
formatting of a typical raw .csv file export.
ID, DEPTH_METRES, A_POSITIVE_SINX, B_POSITIVE_SINX, A_POSITIVE_MM, B_POSITIVE_MM, etc
19,0.5,0.0083666,0.0019453,4.1833,0.97265,-0.0083284,0.0216397,-4.1642,10.8198, 17.246,17,532
18,1,0.0083852,0.0019631,4.1926,0.98155,-0.0083313,0.021654,-4.16565,10.827,17.253,17.545
17,1.5,0.0074967,0.0019666,3.74835,0.9833,-0.0074857,0.0215836,-3.74285,10.7918,17.251,17.538
16,2,0.0075014,0.0019636,3.7507,0.9818,-0.0074974,0.0215763,-3.7487,10.7881,17.260,17.545
etc, etc, etc
Figure 36: Format of raw .csv file format from export

10.2. Data Reduction

Data reduction and presentation can also be carried out using a standard
spreadsheet. The following is a guide on how each value would be calculated.
The first stage is to import the '.csv' data file, ensuring that a comma is identified as
the 'delineator' for the columns.
Once the data is imported, and assuming that the site name is in cell A1, expand the
columns to show all the values they contain.
Figure 37: Data reduction
To simplify the spreadsheet, it is recommended to hide all the columns EXCEPT A,
B, E, F, I and J. Therefore, the only visible columns will be the Header Data and
column ID, together with Depth and readings for A+, B+, A- and B-.
The 0.5m reading for the A+ direction should be in cell E13
Since inclinometer are commonly installed to quantify changes in a structure, it is
necessary to establish the reference set of data to which subsequent data can be
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