PNI TCM - Manual (Page 39)

PNI Sensor Corporation DOC#1014688 r06
TCM User Manual – July 2013 Page 34
6.7 Graph Tab
The graph provides a 2-axis (X,Y) plot of the measured field strength. If “w/o User Cal”
graph data is selected, the plot and data provide magnetic field strength measurements after
the FIR taps are applied, but prior to applying the user calibration coefficients. If “with User
Cal” graph data is selected, the plot and data provide data after applying the FIR filter and the
user calibration coefficients. The sample plot shows a 360° rotation in the horizontal plane,
with both “w/o User Cal” and “with User Cal” selected. The offset between these two plots
represents the effect of the calibration coefficients. The graph can be used to visually see
hard and soft iron effects within the environment measured by the TCM, as well as corrected
output after a user calibration has been performed.