Nikon NR-5500 Repair Manual - Page 22
Browse online or download pdf Repair Manual for Measuring Instruments Nikon NR-5500. Nikon NR-5500 25 pages. Auto refractometer
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TEST PROGRAM
© Pre - adjustment of signal
• Press the [PRINT] key or measuring switch to put out the anterior illumination.
• Adjust the TRIGGER LEVEL on oscilloscope to freeze a signal.
** When adjusting a signal, get a continuous anterior illuminating with pressing
the measuring switch.
• In case the boundary (line A) is tilted.
Make the boundary (line A) a level with slight height adjustment by turning
a Joystick handle.
• Align the middle of pedestal part (line B) with the vertical center of co - ordinate axis
on oscilloscope screen using the POSITION knob.
(D Calibration of image brightness inside a pupil
• Set a shoulder part of pupil image signal to 0. 2 V ± 0. 0 2 V (1 grad± 0. 1 grads)
with adjusting a VR 1 on small board mounted on the REF board in the measuring
head.
(Increase the signal by counterclockwise)
** Keep a continuous lighting by pressing measuring switch for the brightness
adjustment. )
(6) Anterior illumination light setting
• Press the [PRINT] key and put on the anterior illumination.
• Set the auxiliary control knob for monitor's contrast and brightness to be face the flat
part up. (Open the printer paper cover)
• Set the anterior illumination LED's intensity properly with adjusting the VR 2 on the
REF board.
(Increase the intensity by clockwise)
When pressing the [PRINT] key each time, anterior illumination
repeats a blinking.
At this time, set the illumination intensity to be the maximum
without the distortion of the character and camera images
on monitor.
[6-161
Repair Manual