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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
Summary of Contents for humphrey HFA II-i series
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Page 516: ...Page 2 FA2i 046 Figure 1 Glass Film Wedge Detectors P N 67417 Note Spacing Washer Placement...
Page 517: ...FA2i 046 Page 3 Figure 2 Y Motor Turret Detector P N 67418 Note Spacing Washer Placement...