Portable Luxmeter 3286A (DISCONTINUED)

Notice: This product was discontinued on Jan 14, 2010.
  • For measuring the low intensities of illumination from 0 to 300 lx in 5 ranges.
  • Cosine and color corrected
  • Output to recorder (Standard)
  • Taut-band suspension type indicator
  • Standard carrying case and pocket light
Model High-Sensitivity
Measuring Range 0 to 10 lx
0 to 100 lx
0 to 3 lx
0 to 30 lx
0 to 300 lx
Accuracy ± 7% of reader (23°C ± 2°C)
Photocell Selenium cell with plastic molding
Approx. Photocell Lead Length 1.4 m
4.6 ft
Color Correction By color-correcting filter.
Output 1V ± 5%, output resistance less than 1Ω.
Indicator Taut band suspension type with a mirror scale
Power Source One 9V dry cell (6F22) built in.
Operating Temperature Range -10 to 40 ºC
14 to 104 ºF
Humidity Range 85% or less
Aprrox. Dimensions (Carrying Case) 6 1/8 x 6 1/8 x 3 3/8 in
160 x 160 x 92 mm
Aprrox. Weight 1.1 kg
2.4 lb
Accessories Supplied at No Extra Cost Carrying case 1pc, pocket light 1 pc.
Applicable Standard Designed based on JISC 1609-1993 CLASS A
Cosine Correction Angular errors of light incidences are corrected by the globe covered on photocell (with spectral transmission characteristics) Angle of incidences 10° within ± 1.5%. 30° within ±3%. 60° within ± 10%. 80° within ±30%
Operating Principle When irradiated, the selenium photocell generates a potential differences, and the photocurrent is read on the DC ammeter which is calibrated in lx.

Color-correcting filters
The spectral responses is different from that of human eye. Therefore, color -correcting filter(s) are use with photocel. The color sensitivity of photocell is nearer to the standard luminosity curve (average human eye distribution curve).

Cosine correction globe
The photocell response to light varies with the angel of incidence (so-called cosine law) due to the reflection from the surface of the cell. Angular errors are corrected using cosine correction globe with the photocell.

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