Forums: Skydiving: General Skydiving Discussions:
strange altimeter question...

 


Zenister  (A 42)

Feb 8, 2003, 11:50 PM
Post #1 of 9 (882 views)
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strange altimeter question... Can't Post

my room mate had my gear shipped up to me in Seattle i check my altimeter says 10k.

idid it really 10 k and to zero it i turn it down (9,8,7)?

or did it only lose 2k from its last zero at eloy? and so is -2 ??

i know it went by air to get to me so i'm thinking there isnt really any way to tell when the change occurred which direction it was is there?

so how do i know which way to zero it?

feels like this is a stupid question for some reason.and funny that altimeter isnt in the dictionary..


hookitt  (D License)

Feb 9, 2003, 12:00 AM
Post #2 of 9 (871 views)
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Re: [Zenister] strange altimeter question... [In reply to] Can't Post

zero is zero

Choose a direction :)


Premier PhreeZone  (D License)
Moderator
Feb 9, 2003, 12:20 AM
Post #3 of 9 (867 views)
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Re: [Zenister] strange altimeter question... [In reply to] Can't Post

Whats your field elevation and whats Eloys Wink Unless you are above 3000 feet MSL anything the alti reads will show you being negative. IE 0 at Eloy (lets say 4000 feet), ship it to you at 2000 feet will be -2000 feet or 10k on the alti Wink


pilotdave  (D License)

Feb 9, 2003, 1:14 AM
Post #4 of 9 (863 views)
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Re: [Zenister] strange altimeter question... [In reply to] Can't Post

The position of the dial has no affect on the internal workings of the altimeter. You don't need to "unwind" it. Just spin it whichever way is more convenient.

Dave


sdctlc  (D 16437)

Feb 9, 2003, 6:49 AM
Post #5 of 9 (809 views)
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Re: [Zenister] strange altimeter question... [In reply to] Can't Post

The altimeter went down in elevation. Eloy is approx 1500-1550' MSL and Seattle is basically SeaLevel. If you are at one of the DZ's around seattle it would be higher or closer to zero on the dial since none of the DZ's here are actually at SeaLevel.

The altimeter was probably affected by the lower "end" location compared to its start shipping point. It also could be additionally affected by a barametric pressure difference.

Basically turn it the shortest didtance to the "0"

Scott C.


Premier LouDiamond  (D 25931)
Moderator
Feb 9, 2003, 8:09 AM
Post #6 of 9 (787 views)
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Re: [Zenister] strange altimeter question... [In reply to] Can't Post

hey Zen, just hit the reset button on the bottom and let all the barometric pressure escape out of the unit. Be carefull though, it comes out of the unit like compressed air but harderWink


cgross

Feb 9, 2003, 9:43 AM
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Re: [LouDiamond] strange altimeter question... [In reply to] Can't Post

You are to F***ing funny!!!!!


skr  (D 981)

Feb 9, 2003, 1:44 PM
Post #8 of 9 (706 views)
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Re: [Zenister] strange altimeter question... [In reply to] Can't Post

>or did it only lose 2k from its last zero at eloy? and so is -2 ??

I think it's that. The needle went counterclockwise
from 12,000 to 11,000 to 10,000, so you should
fix it by moving the needle clockwise from 10 to 11
to 12.

It matters which way you turn it.

I took one apart once. The needle was attached,
through several gears, to a little metal bellows which
expanded and contracted as outside pressure changed.

If you turn the needle the wrong way to zero, then
the inner workings are really at + or - 12,000 ft,
and it wasn't meant to be used that way.

Skr


Premier billvon  (D 16479)
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Feb 9, 2003, 4:43 PM
Post #9 of 9 (669 views)
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Re: [skr] strange altimeter question... [In reply to] Can't Post

>It matters which way you turn it.

Only on altimeters that have an adjustment knob (as I believe the Alti II does.) For others that turn the face of the altimeter rather than the mechanism it doesn't matter.



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