TM 9-6650-212-12
CHAPTER 2
OPERATING INSTRUCTIONS
Section I.
CONTROLS
2-1. General.
2-3. Tripod M15.
This section describes, locates, illustrates, and
furnishes the operator with essential information
to maintain a desired height for the telescope.
pertaining to the various controls provided for
The collar is held in position by securely tighten-
the proper operation of telescope M49 and tripod
ing the clamping screw.
M15.
2-2. Telesecope M49.
azimuth.
to adjust the cradle of the tripod, to increase or
telescope before it can be used. The cap and cover
decrease the angle of elevation of the telescope.
protect the optics when the telescope is not in use.
d. The tripod legs can be held in an adjusted
turned clockwise or counterclockwise until the
position by tightening the screw nut at the upper
image can be clearly seen by the operator.
end of each leg.
Section II.
OPERATION UNDER USUAL CONDITIONS
a. Unnecessary turning of screws or other
2 - 4 . General.
parts not incident to the use of the instrument is
This section contains instructions for the
forbidden.
proper care of the materiel, preparation for oper-
b. Stops are provided on instruments to limit
ation, and the operation of observation telescope
the travel of the moving parts. Do not attempt to
M49 and tripod M15 under conditions of moderate
force the rotation of any knob beyond the stop
temperature and humidity. Every organization
limit.
equipped with this telescope must thoroughly
c. Keep the instrument as clean and dry as
train its personnel in the procedures for operating
possible. If the telescope or tripod is wet, dry it
this instrument and the tripod. For operations
carefully.
under unusual conditions, see paragraph 2-8
d. When not in use, keep the equipment covered
through 2-11.
and protected from dust and moisture.
e. Do not point optical instruments directly at
the sun unless a filter is used, as the heat of the
2-5.
Care in Handling.
focused rays may damage optical elements.
The observation telescope will not stand rough
handling or abuse. Inaccuracy or malfunctions
2-6. Preparation for Use.
will result from mistreatment. Any instrument
a. Setting Up.
which cannot be adjusted or corrected by the
(1) Unfasten the tripod carrying case cover
authorized procedure must be brought to the
flaps and remove the tripod (fig. 2-2). The un-
attention of maintenance personnel for necessary
repairs. Adjustments other than those expressly
buckled strap of the tripod should be fastened to
authorized will not be performed by the operator.
provide a loop 3 inches in diameter.
2-1
