TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 3-12. FINAL INSPECTION INSTRUCTIONS (CONT). EYEPIECE ASSEMBLY FOCUS INSPECTION AND ADJUSTMENT (CONT) 4 Place dioptometer (4) over eyepiece assembly (5). 5 If minus 0.75 to minus 1.0 cannot be obtained, move eyepiece assembly (5) in or out until reticle (6) is at its sharpest point. SETTING UP AND ADJUSTING TELESCOPE TEST FIXTURE 1 Secure telescope test fixture (1) on an adjustable test stand of suitable height. 2 Position precision level (2) on telescope test fixture (1). 3 Adjust telescope test fixture (1) until level bubble (3) is centered. 4 Remove precision level (2). 5 Hang a plumbline at a convenient distance. 3-20