24
(2) Averaging of readings, n Sample in the average
This will be a moving average filter of the magnetic readings and the
accelerometer readings. A value of 1 sample is no filtering, the default is 6 with an
output rate of 10 samples per second. The output rate of samples per second
combines with the number of samples in the average to give you the lag in
response time of the output.
(3) Output rate of the compass sentences, n samples per second.
Values that are negative are for less than one sample per second. You can set this
from -40 (1 sample every 40 seconds) to -2 (1 sample every 2 seconds). If the
values are positive this is number of samples per second. The range is 1 (1 sample
per second) to 40 (40 samples per second, 40 hz).
<esc>R n <enter> ! change the output rate of the compass to n
If your using output rates of greater than 20 hz you should change the D filter
value to 2 or 1.
Temperature Calibration (not required)
-----------------------------------
The OS5000 reports its temperature from the sensor inside of the modules 50
MIPS microprocessor. It is affected slightly by the operating voltage of the
module. It may require a linear offset to make it align with ambient temperature.
Using the command <esc>+ ttt <enter> you can offset this temperature. Enter
the value in degrees Cx10.. Example: 25 will add 2.5 degrees C to the
measurement. -92 will deduct 9.2 degrees C. Note: This calibration step is not
required and is for users looking for better temperature accuracy.
Calibration of Raw Magnetic readings in milliguass (not required)
-------------------------------------------------------------------------
You can set the milligauss of the Horizontal earths magnetic field using the
<esc>U mmmm <enter>. This is milliguassx10. Example 1794 for 179.4
milligauss. You can use the NOAA provided web model using your latitude and
longitude and nanoTesla Horizontal for the earth’s field in your local area.
Convert this to milligauss (divide by 100). Make this change in compass settings
before you calibrate the compass and the magnetic vector output will be in
milliGuass. NOAA Link:
http://www.ngdc.noaa.gov/seg/geomag/jsp/IGRFWMM.jsp?defaultModel=WMM
M210.12,Mx121.21,My12.12,Mz171.1
M=Vector Intensity
Mx=X component
My=Y component
Mz=Z component
Acceleration Raw Output Data
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