I did a similar calibration in a small stand of trees one lunchtime near where I work. I think the important thing is to ensure you have the back of the disto held on a fix point, and the laser pointer on a fixed target for each of the 4 readings per barrel roll of the device. Choose trees with a spacing of 4-5m to get the most accurate readings. I followed the instructions and took all 56 readings representing the directions from the centre to the 6 faces and 8 corners of an imagined cube. It is only the directions which are important, so you can move the disto to a different tree to get each set of 4 readings. Assuming your DistoX is not faulty, this should give a good calibration. I got 0.25 on my second attempt.
Footleg 2009/5/4 Bruce Mutton <bruce.mutton at paradise.net.nz> > > BTW, the best way to callibrate DistoX is to find in a forest THREE > trees 2 m each from the other representing "half of cube". > > A->B > B->A > B->C > C->B > > C->base of B > C->2 m height of B > B->base of C > B->2 m height of C > B->base of A > B->2 m height of A > A->base of B > A->2 m height of B > up to your upset hand > down to your feet > > > Martin > I assume B is the 'right angle' corner of the triangle formed by the trees. > In this case, if I understand you correctly, you have described directions > that are much more biased to particular orientations than Beats > instructions > (The diagonal plan and sloping directions are omitted). The instructions > do > say the particular orientation is not important, but given the troubles I > am > having I would have thought a uniform three dimensional spread described by > cube faces and vertices would be less risky. > > On the other I can see it is easy to implement in the field without any > special equipment provided one can brace the disto-X against the tree and > not bump it when the button is pressed. > > I'll give it a go. > > Bruce > > _______________________________________________ > Therion mailing list > Therion at speleo.sk > http://mailman.speleo.sk/mailman/listinfo/therion > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20090504/6542c97b/attachment.html>
