Johnson Theodolites 40-6936 Manual De Instrucciones página 27

8863H-All_Manuals 3/19/15 3:25 PM Page 27
• Move the telescope using the vertical fine movement and observe
whether point A moves along the vertical hair.
• If point A moves along the vertical hair of the reticle, no adjustment
is necessary.
• Adjustment is necessary if the point A strays from the vertical
crosshair.
Calibrating
• Turn counterclockwise and remove the reticle cover between the
eyepiece and focusing handwheel. This will expose four reticle set
screws.
• Loosen these four set screws equally with a screwdriver. Turn the
Assembly so that point A coincides with the vertical crosshair.
• Tighten these four set screws equally and observe whether any
transversal deviation appears when point A moves along the
vertical hair. If not, the adjustment is over.
• Assemble back the protective cover to its original position.
©2015 Johnson Level & Tool - Rev. 1
Clamp Screws
of Reticle Base
Reticle Adjusting Screw
27