Testing; Ambient Exposure Test - Polaroid Joshua Vision Service Manual

Testing

Ambient Exposure Test

Purpose
The Ambient Exposure Test is used to measure the energy of the film plane during an ambient (visible)
light exposure. The Star Tester light integrating sphere provides a constant scene brightness level of
100 candles/ft 2 .
Setup (Figure 3-3)
1. Open the camera door.
2. Using a solder aid tool, manually trip the camera door switch into its down position.
3. Using a solder aid tool, remove the front cover from the camera.
4. Install the Joshua Test Cover in place of the removed front cover.
5. Set the Joshua Test Cover Strobe/Ambient(STB/AMB) switch to its Ambient (AMB) position.
6. Place the camera with the Joshua Test Cover onto the Joshua Horn Assembly.
7. Remove the 640 Nest Assembly from the Star Tester.
CAMERA DOOR
SWITCH
CAMERA
JOSHUA HORN
ASSEMBLY
Figure 3-3. Ambient Exposure Test Setup
JOSHUA TEST
COVER
3 - 5
AMBIENT/STROBE
TRIM WHEELS