luxvision LM 300, Руководство пользователя

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*2.
To obtain most precise measuring result, the better way is to turn diopter
measuring hand-wheel in one-way, with rotating direction of: - 25D +25D.
4.1.2 Putting Lens in Position
1.
Lens shall be placed on measurement bearing seat with concave facing
downwards (Fig.8).
Fig. 8
2.
Lift upwards the lens pressing mechanism, then lower it to press lens; when
measurement is over, lift upwards the lens pressing mechanism again to the
top end so that lens pressing mechanism is hung tightly and automatically.
3.
When lens on the frame is measured, lower part of frame (i.e. two lens rings)
should contact lens pushing board: turn lens pushing hand lever to push
out the lens pushing board (Fig.9).
Fig. 9