
PNI Sensor Corporation DOC#1014688 r06
TCM User Manual – July 2013 Page 24
Table 6-1: Mounting Orientations
Y Sensor Up Plus
90 Degrees
Y Sensor Up Plus
180 Degrees
Y Sensor Up Plus
270 Degrees
X Sensor Up Plus
90 Degrees
Z Sensor Down
Plus 90 Degrees
X Sensor Up Plus
180 Degrees
Z Sensor Down
Plus 180 Degrees
X Sensor Up Plus
270 Degrees
Z Sensor Up Plus
270 Degrees
6.3.2 North Reference
Declination, also called magnetic variation, is the difference between true and magnetic
north. It is measured in degrees east or west of true north. Correcting for declination is
accomplished by storing the correct declination angle, and then changing the heading
reference from magnetic north to true north. Declination angles vary throughout the
world, and change very slowly over time. For the greatest possible accuracy, go to the
National Geophysical Data Center web page below to get the declination angle based on
your latitude and longitude:
http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp
Magnetic
When the <Magnetic> button is selected, heading will be relative to magnetic north.
True
When the <True> button is selected, heading will be relative to true north. In this
case, the declination needs to be set in the “Declination” window.
6.3.3 Endianess
Select either the <Big> or <Little> Endian button. The default setting is <Big>. See
Sections 7.2 and 7.3 for additional information.
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