Jadak Photo Research PR-810, Руководство пользователя

Страница: 50 / 120

PR-805/810/810
L
User Manual
42
U
SING A N
O
BJE C TI VE
L
E N SE S
Aligning and focusing the Optical System
1. If using the MS-75, make sure the target is out of focus by defocusing the lens. If using a fixed
focus lens, such as the MS-2.5X, move either the target or instrument until the target is out of
focus.
2. Turn the diopter adjustment on the eyepiece until the measuring aperture (black spot in the
center of the field of view) is in sharp focus. If the entire aperture does not focus simultaneously,
make sure the
top and bottom of the aperture are in focus.
3. Focus on the target. If using the MS-75 lens, rotate the lens focusing ring until the target is in
focus. If using a fixed focus lens, move either the instrument or the target until sharp focus is
achieved.
Do not use the eyepiece diopter adjustment to focus on the target.
Objective Lens
Diopter
adjustment
FIGURE 45 - PR-8XX/ PR-8XX FOCUSING
4. Make sure the measuring aperture falls within the lit area of the target. Failure to adhere to this
step will result in erroneous readings. If possible, or unless otherwise specified, we recommend
that the diameter of the aperture cover 50% to 80% of the smallest dimension of the object (e.g.
character
‘ 1 ’ in Figure 46).
Correct Incorrect
FIGURE 46 - APERTURE ALIGNMENT
5. From the Instrument Setup menu, Clickthe
▲ ▼
icons adjacent to Primary Accessory until the
installed lens appears.
6. Make any other changes in the Setup menu such as Sensitivity, Speed, Average etc.
7. Click the MEASURE button to begin a measurement.