Zls (Zonal Lumen Seconds) Graywall Test - Polaroid ProCam Repair Manual

ZLS (Zonal Lumen Seconds) Graywall Test

The ZLS Graywall Test measures the maximum strobe output. This accomplished
by measuring the energy on the film plane during a 4.5-foot (135 cm) graywall
exposure with the shutter blades fully open.
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, except for
the AF and audio (OFF). Keep the Lighten/Darken switch in the mid-point
(normal) position.
4. Cover the Photocell on the ProCam.
5. Set the TEST selector to 7000 ZLS.
Test Procedure
1. Press the shutter button fully and record the ZLS meter reading. Compare
the reading to the specification.
2. If the test reading is not within specification, replace either the Flashtube
Assembly or the Strobe Board and then retest.
3. If ZLS test reading is within specification but the Strobe Exposure
(Graywall) reading is still out-of-specification, perform the Hybrid Test.
2 - 13