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 - 42 52235C1105
4.9.6 Trial Lens Holder
This procedure is used to align the trial lens holder. This must be done prior to aligning the
camera or the gaze tracking system.
Special Tools / Equipment Required
P
Tool Stand
P
Trial Lens Holder Height Adaptor
P
Zero Degree Trial Lens Alignment Adaptor (Black)
P
C-clamp
Setup
1) Install the trial lens holder height adaptor and the chinrest mount on the bottom of the
tool stand.
2) Remove the fake eye and install the trial lens alignment adaptor on the tool stand.
Procedure
1) Remove the front cover assembly (Section 3.2) and, using the C-clamp, clamp it
securely in the upright position to a convenient work surface.
2) Mount the tool stand on the chinrest. Raise the chinrest (by manipulating the short
belt inside the front cover) high enough to allow clearance of the height adaptor; then
slide the chinrest mount over the chinrest. Push the mount onto the chinrest as far as
it will go.
3) Center the chinrest by moving it left or right (manipulate the long belt). Use the edges
of the chinrest and the molded lines on the front cover as visual reference (Figure 4-
15).
4) Lower the chinrest until the height adaptor touches the front cover.
5) Manually lift the chinrest and tool stand slightly, and raise the trial lens holder into
position below the tip of the trial lens alignment adaptor (Figure 4-16). Now lower the
tool stand so that it again rests on the height adaptor.
If properly aligned, the trial lens holder should encircle the tip of the alignment
adaptor, with slight clearance all around (Figure 4-16).
6) Ensure that you have pushed the tool stand forward slightly on the chinrest so that the
metal tips on the Tool Stand Alignment Adaptor make contact with the headrest
(Figure 4-2). This is the position the tool stand should be in when performing the
procedure.