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
Manual
Reset Adjustment
Star Tester Setting Cal. Box Setting Necessary? Point
* 1. 640 FL.EXP. B-STR-Pulse No Card 1 R4
* 2. ZLS (Use Std.Camera) No Card 1 R6
* 3. Ambient 600 B-AMB-Pulse No Card 1 R5
4. 660 FL.EXP. B-STR-Pulse No Card 2 R1
5. 610/620 FL.EXP. C-AMB-Pulse No Card 2 R3
6. SX-70 Aper. D-AMB-Pulse Yes Card 2 R4
7. Ambient 150 C-AMB-Pulse No Card 2 R2
8. Pronto! 3' Aper. E-AMB-Pulse Yes Card 2 R5
* 9. ZLS (Amp-Sec) A-AMB-Pulse Yes Card 3 R32
10. ZLS (Recycle Time) A-AMB-Pulse Yes Card 3 R25
*11. Ambient 600 (Light level STD- Via access
Adjust for 100 cd/sq ft) hole in rear
panel of Tester
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.
105
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