TB 9-5855-1891-40
NOTE
Do not readjust upper mirror controls during procedures which
follow.
(22) Look through EYEPIECE (fig. 8) and using MIDDLE MIRROR CONTROLS,
align reflected image from MIDDLE MIRROR with stationary reticle reflected image of
UPPER MIRROR (fig. 8).
(23) Close MIDDLE MIRROR OPTICAL BAFFLE and open LOWER MIRROR
OPTICAL BAFFLE (fig. 8).
(24) Look through EYEPIECE and use LOWER MIRROR CONTROLS to align
reflected image from LOWER MIRROR CONTROL with reflected image of UPPER
MIRROR CONTROL (fig. 8).
(25) Close LOWER MIRROR OPTICAL BAFFLE and open MIDDLE MIRROR
OPTICAL BAFFLE (fig. 8). Verify that MIDDLE MIRROR REFLECTED IMAGE remains
aligned with UPPER MIRROR REFLECTED IMAGE (fig. 8).
(26) Close MIDDLE MIRROR OPTICAL BAFFLE (fig. 8).
(27) Rotate SMALL CENTER MICROMETER HORIZONTAL CONTROL (fig. 3) (do
not hold OUTER MICROMETER HORIZONTAL CONTROL while rotating SMALL
CENTER MICROMETER HORIZONTAL CONTROL) to align HORIZONTAL BIFILARS
(fig. 8) with horizontal reflected image.
NOTE
Make copies of test data sheets (minimum of five copies each
are required) located at the end of this TB for recording test
results.
(28) Record reading from HORIZONTAL VIEWER (fig. 3) on test data sheet under
Reference Mirror Data column (Window 1).
(29) Rotate SMALL CENTER MICROMETER HORIZONTAL CONTROL (fig. 3) to
move bifilars from horizontal reflected image and then realign HORIZONTAL BIFILARS
(fig. 8) with horizontal reflected image.
(30) Record reading from HORIZONTAL VIEWER (fig. 3) on test data sheet under
Reference Mirror Data column (Window 1).
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