Compass calibration

[kjkim93]

So I unplugged my battery due to working on electrical stuff. After plugging everything back in my compass started displaying a C. I've tried to calibrate it multiple times but the C is the only thing on the screen

 

[CaptainXL]

So I unplugged my battery due to working on electrical stuff. After plugging everything back in my compass started displaying a C. I've tried to calibrate it multiple times but the C is the only thing on the screen

Calibration has nothing to do with temp units. To change units hold the power button down on the mirror.

 

[meerschm]

are you familiar with your owners manual?

http://www.extendedgmwarranty.com/owners-manual/chevrolet/2006-Chevrolet-Trailblazer.pdf

you could have the capability to display either temp or compass heading in the mirror.

 

[kjkim93]

Thank you guys! i figured it out. when i unplugged the battery it reset everything and thank you for the link to the manual! i needed it!

 

[meerschm]

NGDC Geomagnetic Calculators | ngdc.noaa.gov



note that the declination adjustment varies over time

link above should give you a lookup calculator to find the current declination.

of course this may not help since the compass takes a zone number. does anyone have a translation between declination degrees and zone number?

I only mention this remembering they had to renumber a couple runways due to changing magnetic compass headings. of course this all could just be in the noise for an eight point compass.

 

[The_Roadie]

..does anyone have a translation between declination degrees and zone number?...

I never saw anything but the map in the manual

View attachment 25907

 

[meerschm]

http://www.ngdc.noaa.gov/geomag/img/DeclinationMap_US.png

(map too big to post here)

the actual declination moves, but not too much. I was curious since it looks like I am in zone 10 in the map in the owners manual Roadie posted, and also around 10 degrees.

looks like the default is set to 6, which, funny enough, is a few degrees plus or minus declination.(close to no adjustment needed)

I convinced myself the map is close enough. even though it looks like it is at least ten years old

if you were very far north, things have changed. I think magnetic north has moved quite a bit in the last ten years.

 

[The_Roadie]

I think magnetic north has moved quite a bit in the last ten years.

View attachment 25920

View attachment 25921

 

[Mark20]

Is the earth's population going to be blamed for this too, like global warning?

"Stop using those compasses, you're causing pole shift!"

 

[CaptainXL]

Is the earth's population going to be blamed for this too, like global warning?

"Stop using those compasses, you're causing pole shift!"

I was watching one of those history channel documentaries. And the scientist said we are due for a geomagnetic pole reversal. And in the period of time this is happening the earth's magnetic field is weakest and we will be subject to extreme cosmic radiation and failure of all types of electrical things.

 

[WarGawd]

I was watching one of those history channel documentaries. And the scientist said we are due for a geomagnetic pole reversal. And in the period of time this is happening the earth's magnetic field is weakest and we will be subject to extreme cosmic radiation and failure of all types of electrical things.

There were some pretty credible people touting this expected geomagnetic shift as the catastrophe that would bring about the end of the world as apparently forecast by the Mayans. And if you track down all of James Burke's series called Connections (Connections (TV series) - Wikipedia, the free encyclopedia ), he draws a pretty fascinating connection between the ever increasing pace of technological development, and society's ever more blind dependence on it. If there's any significant truth what you're saying above, maybe that Mayan prediction will prove to have been essentially right....all pretty interesting stuff.

EDIT: Lol wtf was this thread about again? Sorry for the continued hijack

 

[Phantom]

Wow talk about a left turn on a post. lol But the OP did get it figured out so I guess it doesn't matter?