Data Sheet

5/29/2019 PhidgetSpatial Precision 3/3/3 High Resolution - 1044_1B at Phidgets
https://www.phidgets.com/?tier=3&catid=10&pcid=8&prodid=1158 10/11
The maximum sampling rate of the compass is 125 Hz.
Magnetic Error Correction (Calibration)
In order to get numbers of useful accuracy from the 1044's compass you will need to provide calibration parameters. To make
determining them easy, we distribute a program with our drivers that does this for you.
To calibrate your compass:
Navigate to the Phidgets installation folder on your computer. Open the 'examples' folder and nd the Compass Calibrator
program.
Start the program and nd the link in the Settings/Status text box. Go to the website listed.
(http://www.ngdc.noaa.gov/geomag-web/#igrfwmm)
Select your country and city. Click 'Get Location' and then 'Compute'. A table of values will show up in an overlaid window. The
value you will need is the 'Total Field' value in nT.
Enter the magnetic eld value into the calibration program. Note that it wants the eld strength in Gauss, not nT like the
website gives you. 1T = 10000 Gauss so you can divide by 1x10^5 to convert to Gauss.
Depending on what your application is this step as well as the next step might be a bit different. If you are intending on
mounting the 1044 onto a large vehicle such as a car then you should mount the 1056 securely to the vehicle in its nal
intended position then check the 2-axis bubble, click the 'Start' button.
If you are using a smaller, more easily handled vehicle such as a small robot (something you could physically pick up) you will
mount the 1044 and use the 3-axis calibration instead. Click 'Start'.
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