Operation; Recommendations Before Operating; Operating Instructions - AEMC CA811 User Manual

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4.1

• Keep the white plastic domed cosine corrector clean and free of any

scratches. It may be cleaned with a soft cloth and a little water or iso-

propyl alcohol.

• Avoid reflections or shadows from your body onto the sensor, when

light is emitted from many directions.

• For best accuracy, repeat measurements several times to ensure that

the light source is stable.

• Avoid flexing the cable excessively at either end.

4.2

1. Slide the function switch to the desired lux or fc (foot-candle) setting.

2. Select the appropriate range or, if in doubt, select the highest setting

(klux or kfc).

3. Remove the sensor head cover.

4. Hold the sensor head steady and make sure that the light completely

fills the cosine correction white dome.

5. Move away from the sensor head to avoid shadowing it. The sensor

head has a 5 ft (1.5m) extension cable to allow separation between

the case and the unobstructed measurement location.

6. Press the RANGE button until an optimum reading range is obtained.

7. Read the illuminant value directly from the display.

8. When finished, slide the function switch to OFF and cover the sensor

head (extends the sensor life).

Lightmeter Models CA811 and CA813

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CHAPTER 4

OPERATION

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