protrack help?

[jtval 0]

cross post---

ok I've always doubted the speed on my protrack but now I know something it Fk'd.

I jumped twice today from 10,000ft (cessna)

the first time it only registered 4300 siad I opened at 2000
the second reigistered 7000 ft said I opene dat 2000.

I was totally NOT relying on the thing but it was beeping at all the correct altitudes. Does anyone know WTF?

(another anomoly)
another jumper had the same problem with his protrack...jumped once and it didnt grab the correct cieling altitdude. maybe this has something to do with ....um....I dont know?

does anyone have any INFO?

My photos

My Videos

[sducoach 0]

How old is your Protrack?
Mine did the same kind of thing last week. Coach jump from 13.5K with an opening at 3K and it indicated an opening at 12K. I removed the battery and let it set 10 minutes then it seemed to work fine.

Blues,

J.E.

James 4:8

[jtval 0]

AWESOME I will try that thanks!
i bought it in january!
only has about 100 jumps in it

My photos

My Videos

[skygod7777 0]

if it continues to do this, i'd send it back to l+b. i'm sure they'll fix it.

later

[Geoff 0]

It's quite easy for a correctly functioning pro-track to be fooled. (at least with the original software - not sure what the newer ones are like)

Examples:
(1) If you slow down suddenly in freefall, it can think that's a canopy deploying. Only really happens if you cork from a fast freefly. (or so a friend tells me, never happened to me of course....)

(2) If the plane descends suddenly - for instance, you descend because of cloud, and then jump below the cloud, it can show your exit height as the height the plane originally descended from.

Never heard of one registering an exit height lower than the actual exit height. Maybe the plane had to descend suddenly for a while during the climb? I would guess that could cause it...

Or maybe the unit's faulty.

Just a few thoughts.

Geoff