Model | General Purpose |
---|---|
Measuring Range | 0 to 1000 lx 0 to 30 lx 0 to 3000 lx |
Accuracy | ± 7% of reader (23°C ± 2°C) |
Photocell | Selenium cell with plastic molding |
Approx. Photocell Lead Length | 1.1 m 3.6 ft |
Color Correction | By color-correcting filter. |
Output | 10mV ±5%, output resistance approx. 4kΩ. |
Indicator | Taut band suspension type with a mirror scale |
Operating Temperature Range | -10 to 40 ºC 32 to 104 ºF |
Humidity Range | 85% or less |
Aprrox. Dimensions (Carrying Case) | 6 1/8 x 6 1/2 x 3 1/8 in 155 x 165 x 80 mm |
Aprrox. Weight | 0.9 kg 2.0 lb |
Accessories Supplied at No Extra Cost | Carrying case 1pc. |
Applicable Standard | Designed based on JISC 1609-1993 CLASS A |
Cosine Correction | Angular errors of light incidences on the cell are corrected by the globe covered on photocell (with spectral transmission characteristics) Angel of incidence 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 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. |