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Strobe Exposure (Graywall) Test
The Strobe Exposure (Graywall) Test measures the resultant energy on the film
plane during a 4.5-foot (135 cm) graywall exposure.
Setup
1. Using the Door Switch Activator tool, trip the door switch on the ProCam.
2. Place the ProCam on the Test Horn on top of the tester, with the lens 4.5
feet from the graywall.
Note: • Front of the ProCam must be parallel to the graywall.
• Area visible in the viewfinder must be clear of objects.
3. Slide all switches on the ProCam into the down (on) position. Keep the
Lighten/Darken switch in the mid-point (normal) position.
4. Leave the Photocell on the ProCam uncovered.
5. Set the TEST selector to FLASH EXPOSURE.
Test Procedure
1. Press the shutter button fully and record the STOPS ERROR meter
reading.
2. Repeat the process two more times, recording all readings. Compare the
readings to the specification.
3. If the test readings are not within specification, perform the IR Strobe
Exposure Calibration Slide Adjustment and then retest.
4. If adjustment fails to bring the reading within specification, check that the:
• IR black filter is properly seated.
• Photocell cap is properly seated.
• Photocell is seated in the base block.
5. If test steps 1 through 4 does not bring the Strobe Exposure (Graywall)
reading within specification, perform the ZLS Graywall Test.
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