8. FOCUSING AND SIGHTING THE STAFF
28
• If the staff barcodes are out of focus, they will not be readable and measurements cannot be
taken. Makes sure they are correctly focused.
PROCEDURE
1. Look through the telescope at a bright and
featureless background.
2. Looking through the eyepiece, turn the
eyepiece screw clockwise, then
counterclockwise little by little until just before
the reticle image becomes focussed.
Using these procedures, frequent reticle
refocussing is not necessary since your eye is
focussed at infinity.
3. Use the Simple Finder to point the objective
lens at the staff.
4. Turn the horizontal fine motion knobs until the
staff is nearly centered in the field of view, then
turn the focusing knob to focus on the staff.
5. Looking through the telescope, shift your eyes
slightly up and down and to each side. If the
staff and reticle show no deviation, the
instrument is ready for use.
If the staff and reticle deviate, return to step 2.
"8.1 Using the DL-501 Advanced
Eliminating parallax"
•Repeat steps 3 and 4 each time measurement is performed.
8.2 Using the DL-501 Standard
DL-501_E.book 28 ページ ２０１５年９月１７日 木曜日 午後１時２１分
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