AIA/NAS 886-2013 pdf download JIG TRANSIT & JIG TRANSIT SQUARES FOR OPTICAL TOOLING、
JIG TRANSITS AND JIG TRANSIT SQUARES SHALL BE FABRICATED TO,OR HAVE ADJUSTMENT CAPABILITY TO ACHIEVE THEFOLLOWING ACCURACIES:
VERTICAL AND HORIZONAL RETICLE CROSS HAIR PATTERNS TO BE PARALLEL TO THEIR RESPECTIVEMECHANICAL AXES TO WITHIN FIVE (5) ARC SECONDS AS VIEWED THROUGH THE SCOPE.
LINE OF SIGHT (L.O.S.) SHALL BE PERPENDICULAR TO THE HORIZONTAL AXIS TO WITHIN TWO (2) ARCSECONDS.
HORIZONTAL AXIS SHALL BE PERPENDICULAR TO THE VERTICAL AXIS TO WITHIN TWO (2) ARC SECONDS
LINE OF SIGHT (L.O.S.) TO REMAIN IN A LEVEL PLANE THROUGHOUT 360° ROTATION ABOUT VERTICALAXIS TO WITHIN TWO (2) ARC SECONDS.
LINE OF SIGHT (L.O.S.) TO REMAIN STRAIGHT FROM MINIMUM FOCUS TO 50 FT RANGE WITHIN 0.002INCHES AND FROM 50 FT.TO 100 FT.WITHIN 0.004 INCHES
LINE OF SIGHT (L.O.S.) TO BE COINCIDENT (CENTERED) TO THE HORIZONTAL AND VERTICAL AXES TOWITHIN 0.002INCHES.
OPTIONAL OPTICAL MICROMETER MEASURING RANGE AT ANY INTERVAL MEASURED FROM ZERO TO BEWITHIN 0.001 INCHES AND BACKLASH NOT TO EXCEED 0.001 INCHES
OPTIONAL MIRROR OR CROSS SCOPE TO COINCIDE WITH HORIZONTAL AXIS TO WITHIN TWO (2) ARCSECONDS