5 ms·
I wish it were true where I currently work. Our offices line up exactly east-west. In a few weeks time, I'll be installing a calibration fixture to calibrate fl
by shoobs 4y ago
I wish it were true where I currently work. Our offices line up exactly east-west. In a few weeks time, I'll be installing a calibration fixture to calibrate fluxgate magnetometers, and the fixture itself needs to be aligned to magnetic north. What this means is our calibration fixture will be awkwardly aligned 2.54 degrees off-angle to the building. I'm looking forward to patiently explaining to our visitors that it's by design.
- arriu 4y agoWill you need to move it as the magnetic north drifts?
- danuker 4y agoNot the previous commenter, but yes, they'll need to remember to rotate it towards magnetic North. And also to compensate for any ground movements that may shift the building or the sensors.
- colechristensen 4y agoI feel like a poster would do a good job in this situation and serve as a point of interest for visitors. Maybe a kind of informative sculpture pointing to geographic and magnetic north.
- jbay808 4y agoNot that I know any better, but wouldn't it be easier to build a mu-metal shielded enclosure to exclude the Earth's magnetic field (and anything else, eg. from nearby wiring), and then generate your own calibration field with a Helmholtz coil?
- nextaccountic 4y agoCan you actually shield a magnetic field like you do for electric fields with Faraday cages?
- kimburgess 4y agoNot stable ones.
- jbay808 4y agoI'm not sure what you mean by this. You certainly can shield a static magnetic field by using a magnetically soft material.
- kimburgess 4y agoYes, but that's not a faraday cage.
- jbay808 4y agoAh. I think we're parsing nextaccountic's ambiguous grammar differently. My reading: "Can magnetic fields be shielded (by mu-metal), like a Faraday cage shields electric fields?" vs your reading: "Can a Farafay cage shield magnetic fields like it can shield electric fields?"
- kimburgess 4y agoYep, I was being pedantic meanwhile you were likely providing useful info :).
- jbay808 4y agoAbsolutely you can. And that's what mu-metal is designed for.
- lifeisstillgood 4y agoFor those like me who don't know what that is https://www.sensorland.com/HowPage071.html https://www.sensorland.com/HowPage071.html But of course now Inwant to know why you are measuring magnetic fields? :-)