My name is Mark and I am using Picologger ADC-20 for a long term project to monitor the earth’s magnetic field. Monitoring the output of a three axis fluxgate aligned to true north. Also the declination of the earth’s field and temperature of the test room. Would be great if there was a tangent func...

Hitesh

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Mark

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Forgot to mention I am using ADC20.

Hi All I am logging 5 channels at 1 second intervals on a i7 laptop running Windows 8. I started the program at 1430hrs UTC to do 24 hour worth of samples (60x60x24=86400 total). Looking this morning 0800hrs UTC expecting the data count to be well over half way but was supprised the the samples was ...

Only one I have seen is in a radioshack book. It was a long tube (3 feet) with a suspended magnet over a hall sensor. Tube was screwed to the bed rock and I think the magnet has to be heavy to avoide being effected by the earth's magnetic field.