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

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Humphrey Field Analyzer II - i Adjustment / Calibration
Confidential and Proprietary
52235C1105 4 - 13
Field Service Guide
4.8.2.2 Shutter
Purpose
This procedure ensures that the shutter is positioned correctly in the open and closed
positions, and that it operates silently. (To avoid damage to the shutter, it should be
calibrated as early in the calibration process as possible.)
Procedure
1) Make sure that the initial shutter adjustment is correct (the shaft is engaged through the
shutter, and the shutter is approximately centered between the hub and the casting).
2) From the Mechanical Calibration menu, select SHUTTER and then ALIGN SHUTTER .
3) Using the UP and DOWN icons, position the shutter so that it is either flush with the
boss edge or one step past the boss edge (see Figure 4-4).
DO NOT
position the
shutter below the boss edge.
NOTE: When positioning the shutter, ALWAYS select FLASH after any movement
command. For example if UP 1 Step is selected, then select FLASH and observe the shutter
reaction. DO NOT make multiple movement selections without selecting FLASH after each
selection, as this will create shutter calibration errors.
When the shutter has been correctly positioned, and is then flashed, it should be
completely silent; no tapping or ticking sounds should be heard.
4) When the shutter is positioned correctly, select
STORE
.
FIGURE 4-4. Shutter Positioning in Calibration