Test Specifications For Model 636 Camera; Graywall Preparation - Polaroid 636 Repair Manual

A. Test Specifications for Model 636 Camera
Test:
Flash Timing
Ambient Exposure
Strobe Exposure (Graywall)
ZLS Output
Charge Time (2nd cycle)
Energy Draw (2nd cycle)
B. Graywall Preparation
1. The target should be constructed of a flat hard board material such as Masonite. It must be
a minimum size of 4 ft. x 4 ft. (1.2 m x 1.2 m).
2. Prepare the surface by applying a primer coat of flat white latex paint. The surface must
have a uniform white appearance when dry. If necessary, use two coats of flat white latex
paint to achieve uniform coverage. Allow 24 hours for the primer to dry.
3. After the primer has dried, apply two coats of special gray paint which has been provided.
The two coats must be applied in opposite directions. For example, apply the first coat in
an up and down direction and the second coat in a left and right direction. Allow plenty of
drying time between the two coats. The amount of drying time is dependent on tempera-
ture and humidity.
4. Choose a suitable location for the testing area. The following conditions must be met:
a. The testing area must be located where lighting on the graywall target will
remain below 10 candles/square foot. Most room lighting meets this
requirement. Avoid areas where outside light shining through a window can
strike the target resulting in erroneous strobe exposure readings.
b. Select an area where the graywall target can be secured to a wall which is
perfectly flat. The area must be large enough to allow the testing equipment to
be placed 4.5 feet (137cm) from the target (see Figure 1). The area must be
free of any obstacles between the camera under test and the graywall.
Specification:
2.0 to 13.0 ms
-0.30 to +0.10
0.0 to -0.50
260 to 400 ZLS
4 sec. max
12.5 amp sec.
86