Polaroid 636 Repair Manual page 118

Model 636 Flash Exposure This test measures the
resultant energy on the film plane during a flash
exposure equivalent to a 4.5 ft graywall exposure.
NOTE:
DETAILED PROCEDURE
1. Set the camera L/D control to its
mid-point setting.
2. Turn the test selector switch to
640 FLASH EXPOSURE
3. Flip the mode switch to EXPOSURE.
4. Orient the camera on the horn so
it is exactly 4.5 ft from a graywall.
5. With photocell uncovered, press
S10/S1 to take a flash exposure.
6. When strobe fires, record reading
shown on Relative Error in Stops meter
Compare reading to the specification.
7. Repeat steps 5 and 6 two more
times to insure accurate reading.
8. If reading is not within specifi-
cation, refer to Adjustments.
The following procedure assumes the camera is
on the horn.
112
SUMMARY
1. Camera L/D to mid-point
2. Selector to 640 FLASH
EXPOSURE.
3. Mode switch to EXPOSURE
4. Camera 4.5 ft from graywall
5. Take flash exposure.
6. Compare reading to
spec.
7. Repeat 5 & 6 twice
8. If out of spec, see Adjustments.