Calibrating The Model 12650-2 Star Tester - Polaroid 636 Repair Manual

G. Calibrating the Model 12650-2 Star Tester
This procedure is a guide for a periodic calibration check of the Star Tester. The details of actual
adjustments are included in a separate document. All readings should be within +0.03 stops or 3%
of the specification. Any re-calibration must be done in the order shown. See your calibrator box
specification sheet for actual readings.
Allow a minimum of 10 minutes of "warm-up" time before checking calibration.
NOTE: * = Applicable to Model 636 Camera
SUMMARY
Star Tester Setting
* 1. 640 FL.EXP.
* 2. ZLS
* 3. Ambient 600
4. 660 FL.EXP.
5. 610/620 FL.EXP.
6. SX-70 Aper.
7. Ambient 150
8. Pronto! 3' Aper.
* 9. ZLS (Amp-Sec)
10. ZLS (Recycle Time) A-AMB-Pulse
*11. Ambient 600
For steps 1 and 3 thru 10, connect the calibrator box to the Star Tester horn connector J1. Set the
cal. box as indicated, press" Reset" on the Star Tester, then press "Cycle" on the cal. box. Note
the appropriate readout on the Star Tester. Repeat when the "Busy" light is not lit.
Cal. Box Setting
B-STR-Pulse
(Use Std.Camera)
B-AMB-Pulse
B-STR-Pulse
C-AMB-Pulse
D-AMB-Pulse
C-AMB-Pulse
E-AMB-Pulse
A-AMB-Pulse
(Light level STD-
Adjust for 100 cd/sq ft)
Manual
Reset Adjustment
Necessary? Point
No Card 1 R4
No Card 1 R6
No Card 1 R5
No Card 2 R1
No Card 2 R3
Yes Card 2 R4
No Card 2 R2
Yes Card 2 R5
Yes Card 3 R32
Yes Card 3 R25
Via access
hole in rear
panel of Tester
105