Instrument Internal Parameter Switches; Appendices - Sokkia DT5 Operating Manual

14. INSTRUMENT INTERNAL PARAMETER
SWITCH ES
ON OFF
5 ¡A.P.c.
4 DI V INDEX
3 DI VO'3l
2 DI V O'
% DI LlR
o T 5
~'\§'?456'-,
.: ~ co
..", ",'0
Q3'1
Note: Before changing these switch settings,
turn the DT5 power off.
SLIDE SWITCH FUNCTION
1 . OFF Display horizontal right/left
angle using El key
ON
Display vertical/% vertical angle
using El key
2 . OFF Vertical angle (0" at zenith)
ON
Vertical angle (0" horizontal on
face left)
3 . OFF Switch has no function
ON
Vertical angle (0" horizontal
::90') (over-rides switch 2
setting)
4 . OFF
Vertical circle indexing by rotat-
ing the telescope
ON
Vertical circle indexing by face
left, face right observations
5 . OFF Auto power cut-off after 30
minutes
ON
No auto power cut-off
Rotary
V and H angle units
switch
'0
Degrees
0' - 359'59'55"
1
gon
o gon - 399.999 gon
2 Mil
o Mil ~ 6399.98 Mil
3 - F
Do not set during use,
(These positions are for service)
Internal
switch · Switch position when instrument left the
cover ~ factory.
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APPENDICES
Appendix A. Indexing vertical circle by face left, face right
readings.
Like all theodolites, the DT5 wil have a vertical index error. The vertical
index can be determined, and the index error removed, by the following
procedure:
V
H
n l- n ii ii
UUUL'Lf ..
.
V 2
H 2'-0:30..
1) Ensure that the DT5 power switch is off.
2) Change the internal switch 4 to ON (see
previous page); i.e. Vertical circle indexing by
face left, face right readings.
Carefully level the DT5 and switch the
instrument on.
The prompt : is displayed in the V display.
Face
left
3) In the face left position, accurately sight a
clear target at a horizontal distance of about
30 metres (100 feet).
Press ..
The prompt 2is displayed in the V display.
4) On face right, accurately sight the same
Face target.
right
. Press. again.
V 2';9'-9'-0
H 2GYD :30 ..
When the vertical circle has been indexed,
the vertical angle is displayed.
Note: The vertical circle must be re-indexed each time the DT5 is
switched on.
Ensure that the instrument is switched off when moving it to a
new location.
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