[Therion] DistoX2 zero distance reference points and end piece extension
Bruce Mutton
bruce at tomo.co.nz
Sun Oct 28 02:02:54 CEST 2018
OK, I figured it out. My mistake, to set the end piece extension, two
actions are required.
1. Set the end piece zero offset using the FUNC button.
2. Toggle the 'back' reference from 'back of case' to 'back of end
piece offset', using REF + FUNC (hold 2 seconds)
The new distoX2 now works as expected, although I still need to calibrate
it.
This IS mentioned in the user manual.
Bruce
From: Therion <therion-bounces at speleo.sk> On Behalf Of Bruce Mutton via
Therion
Sent: Sunday, 28 October 2018 10:19
To: 'List for Therion users' <therion at speleo.sk>
Cc: Bruce Mutton <bruce at tomo.co.nz>
Subject: [Therion] DistoX2 zero distance reference points and end piece
extension
I have an older distoX2 and a new distoX2, and came to thinking about
building a protective case. Naturally the topics of zero reference points
and end piece extensions has come to mind. Rather belatedly I thought I
would run a rudimentary test over a short ~250mm distance that I could
measure with a steel ruler, just to check my understanding of the behaviour.
It was not as I expected, and I have not found an explanation in any of the
documentation. Maybe someone has similar experiences.
The newer distoX2 is not yet calibrated, and they both have differing
hardware and firmware versions, so either or both may be the cause of the
differences. Perhaps a table is the best way to document what I have found.
Disto
Old
New
Hardware
1.0
1.1
Firmware
2.4
2.5
ID
2973
4036
End piece setting
0.012 m
0.060 m
Reference toggle cycle
End piece-front-tripod
Back-front-tripod
Comment
End piece extension reference option is available
End piece extension reference option is NOT available
End piece disto - ruler comparison
267 - 265 mm
works as expected
N/A
Back disto - ruler comparison
N/A
253 - 312 mm
end piece setting ignored, does not work as expected
Front disto - ruler comparison
132 - 131 mm
131 - 131 mm
Tripod disto - ruler comparison
245 - 243 mm
244 - 243 mm
Calibrated
Yes
Not yet
Apparent accuracy
1-2 mm
1 mm except with end piece
One explanation could be that the end piece zero reference is not available
and any end piece setting will be ignored until the distoX2 has been
calibrated.
I am hoping that is what the situation is, and it will be easy enough to
test, once I get around to it. It does seem a bit odd however, as I assume
the calibration is all about directions, and not distances.
Thoughts?
Bruce
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