Alignment A Flashcards
4 sources of error in alignment tools
heat
glass
small opening
edge
light refraction direction when passing from thinner to thicker medium
towards the normal
what does convex mean
focus
what does concave mean
disperse
telescopic sight can be adjust by the
focusing knob
advantage of the pentaprism
object is not reversed
more accurate
auto reflection or auto collimation
auto collimation
requires light source
auto reflection or auto collimation
auto collimation
purpose of optical micrometer
precision leveling
accuracy of precision target
.001
purpose of target holder
centers bearing bores
tool used to establish tool in level position
coincidence striding level
tool used for viewing when telescope mounted too close to ground or obstruction
right angle eye piece
accuracy of lightweight stand
.020
accuracy of heavy duty stand
.001
tool used to support instrument near the floor
trivets
simplest means of obtaining an accurate reading
waving the rod
purpose of alignment telescope
establish reference line of sight
5 uses of jig transit
and the main purpose
level flat plumb straight square main purpose is to plumb
the process of aligning more than 2 targets at the same time
bucking in
used to rough level a jig transit
fish eye
purpose of a thedolite
measures angles
weight of plumb bob
30-50 lbs
wire size for wire alignment
.016 to .020
