TM 5-6675-321-14
8-6.3 Optical Macroscope.
a.
P l a c e o p t i c a l m a c r o s c o p e o v e r a r e a t o b e v i e w e d w i t h i l l u m i n a t i o n s l o t c l o s e to
s p e c i f i c a r e a r e q u i r e d.
b . L o o s e n b a r r e l l o c k s c r e w.
c .
Look through eyepiece and depress push/pull cam switch.
d .
Grasp lens barrel and move it slowly up and down until area to be viewed is
seen clearly and sharply together with graduated scale .
When target and graduated scale appear simultaneously sharp and clear, clamp
b a r r e l l o c k s c r e w.
f. To provide light without keeping push/pull cam switch depressed, turn
push/pull cam switch in either direction through 90 degrees to lock it. Rotation in
o p p o s i t e d i r e c t i o n w i l l u n l o c k i t.
To make measurement, read size of object or target directly from scale.
Scale is 0.150 in. in length and is divided into intervals of 0.001 in .
With care,
estimations of down to 0.0005 in. are possible.
8-7. OPERATION UNDER UNUSUAL CONDITIONS. This equipment is designed for
operation only in a controlled environment.
8-14
e .
g .
