Quantum CALCU-LIGHT X Operating Instructions Manual - page 6
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10:1
11
13:1
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16:1
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20:1
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25:1
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32:1
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400:1
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500:1
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650:1
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800:1
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1000:1
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Model: Calcu-Light X
Capabilities: Incident, reflected, and calibrated light measurements.
Readout: Two digit L.E.D. display of light value in a 1/3 Ev sequence, 01 to 64.
Accuracy: 1/3 Ev.
Sensor: Blue enhanced silicon photodiode.
Measuring Range: Ev -3 to Ev 21.3 for ASA 100 film.
Dial Markings: ASA 0.05 to 800,000
DIN -12 to 60
Shutter 1/4000 sec. to 1 hour
F# f / 0.7 to f / -181
Batteries: Mallory MS-76, 10L14, Ray-O-Vac RS-76, RW-82, Eveready 357, A-76, or equivalents.
Size: 10 x 7 x 3 cm. (4 x 2 3/4 x 1 1/8 inches)
Weight: 112 gms. (4 oz.)
Exposure Constants: (A.N.S.I standard 3.49-1971) k = 3.64; c = 25.6
A NOTE ON BATTERIES
To insure daily trouble-free performance of your meter, proper care must be given to the batteries and the battery
compartment.
1. Clean batteries - use clean tissue paper and rub gently. Handle batteries with tissue paper, not fingers, after
cleaning. When meter is left unused for extended period, remove batteries (do not stack).
2. Clean battery contacts use clean tissue paper with alcohol, or pencil eraser. Clean all four contacts at the bottom
of the battery compartment.
3. Gently clean all four springs on the battery door.
The above procedures should also be followed before replacing old batteries with new ones and before you return
meter to factory for repair, or if batteries appear to be weak.