Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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Adjustment / Calibration Humphrey Field Analyzer II - i
Confidential and Proprietary
Field Service Guide
4 - 12 52235C1105
4.8.1.3 QA Tests
The Q/A Tests option enables the Service technician to manually select various aperture
sizes and intensities to be presented in the bowl. Each test number is unique as to its size,
intensity and location in the bowl. For additional details, refer to Section 5, Troubleshooting
4.8.2 Mechanical
4.8.2.1 Projector
Purpose
This procedure is designed to position the filament of the projection lamp so that the pro-
jected light becomes as uniform as possible across its area of illumination. The so-called Y-
position of the filament is adjusted in this procedure; the X- and Z-positions are preadjusted
at the factory and are not field adjustable.
Special Tools/Equipment Required
P
+3.0 Diopter to +3.5 Diopter Trial Lens
Procedure
1) From the Mechanical Calibration menu, select PROJECTOR.
2) Hold a +3.0D to+3.5 D trial lens in front of the turret lower lens so that the projected
light passes through the lens and into the bowl.
3) Adjust the projection lamp adjustment screw (Figure 4-3) with a 2mm Allen as needed
to center the projected filament image.
FIGURE 4-3. Lamp Filament Position Adjustment