Model 196A Section 11
Paragraphs 2-1 to 2-10
SECTION II
PREPARATION FOR USE
2-1. INCOMING INSPECTION. over a piece of white bond. Make sure the paper is
lying absolutely flat.
2-2. MECHANICAL INSPECTION. Because of the
fragile, expensive lens in your 196A Oscilloscope i. Arrange four identical hexagonal pencils (about
Camera, great care has been taken inpacking to assure 5/16 inch from flat to flat) in a circle as shown infig-
undamaged delivery. Despite these precautions, how- ure 2-1. Slide the clamp ring back toward the camera
ever, damage in shipment will sometimes occur. Upon itself and tighten the locking screws.
receipt of your 196A, check the contents against the
packing list and inspect the camera for any obvious j. Put the camera nose down on the pencils. Open
damage received in transit. To facilitate reshipment, the lens access door and the viewer door.
keep the packing material until an operational check
has been made. Followthe procedure outlined in para- k. Shine a 3-watt source of diffused light into the
graph 2-3. lens across door. Do not point the light at the lens.
(A piece of tissue placed over a 3-watt trouble lamp
2-3. OPERATIONAL CHECK. Due to the many prob- makes a suitable diffused light source for this purpose. )
lems such as oscilloscope light leakage, and differences
in trace intensity and focus that are often present in m. Actuate the shutter and develop the picture. The
oscilloscope photography, and the specialized equip- lines on the graph paper should appear well defined
ment necessary for a complete test, it is difficult to over the entire picture area (figure 2-1).
suggest a dependable method of performing a complete
incoming performance check. The following procedure
is suggested, however, as a means to check basic 196A 2-5. PREPARATION FOR RESHIPMENT.
operation. This check should be performed with nor-
mal room lighting. A complete adjustment procedure 2-6. If, after incoming inspection, damage is evident,
is given in section VI. repack the instrument in its original shipping container
taking care to replace all pads in their original posi-
2-4. Check basic 196Aperformance as follows (refer tions. If this packing is not available, the 196A should
to figure 3- 1 for the location of parts mentioned in the be packed in a strong container and surrounded by 6 to
following steps): 8 inches of cushioning material designed specifically
for package cushioning. Excelsior or other dust-
a. Load the camera with Type 47 Polaroid@ Land producing material should not be used. The 196A
film (follow instructions in figure 3-2, Film Loading). carrying case, available as an accessory (figure 2-2)
should provide sufficient cushioning for the camera.
b. Loosen the knurled locking screws on either side The carrying case should, however, be placed in a
of the camera. protective shipping container that conforms with the
Uniform Freight Classification, and lined with addi-
c. Place a piece of dark paper on an absolutely flat tional sheets of cardboard.
surface that is large enough to accommodate the camera
nose. 2-7. STORAGE.
d. Set the aperture to f/l. 9 and the shutter speed 2-8. When storing this camera, as any high quality
control to one second (see paragraphs 3-8 and 3-9 for optical instrument, care should be taken to protect it
setting these controls). from falls and sudden jars, from sharp changes 'in
temperature and from excessive heat and moisture
e. Place the camera nose-down on the paper and let (see paragraph 2-9). Exposed glass surfaces should
the clamp ring slide down until it rests on the paper. be protected from dust when not in use by using a lens
Shut the lens access door and look in the viewer. If cap or by keeping the camera in its carrying case.
light is seen leaking between the camera nose and the
paper it is probably due to dirt or other irregularities
on the surface. Reposition the camera on the surface 2-90 ENVIRONMENTAL LIMITS.
until no light is admitted. Shut the viewer door.
2- 10. The 196A may be operated or stored within wide
f. Operate the shutter and develop the film (follow environmental conditions. The following limits, how-
developing instructions given in figure 3-4). The pic- ever, should not be exceeded.
ture should be totally black.
a. Max. storage temperature (without film) 160°F.
g. Set shutter speed to 1/100 and aperture to f/4. b. Min. storage temperature (without film) -20°F.
c. Max. operating temperature 120°F.
h. Place a piece of paper that has many sharp dark
lines down on it (K & E graph paper #358-11 is good) d. Min. operating temperature 20°F.
01038-1 2- 1 |
ACEC
