Solar Light’s Model SL-3101 SP-Meter™ is an innovative, portable meter which measures spectral response following the CIE scotopic and photopic action spectra, providing an accurate measurement of brightness as perceived by the human eye. This unit provides on-board calculations for:
- S/P ratio
- Visually effective light level
- Perceived brightness
The human eye has three distinctive regions of response: The first region is the response of the eye under typical lighting conditions (photopic,) defined as intensities greater than approximately 0.1 Lux. The second region is a transitional region known as the Purkinje Region, defined as intensities between approximately 0.01 and 0.1 Lux. The third region is the dark adapted region of the human eye (scotopic,) defined as intensities between about 0.01 and 0.0001 Lux. Intensities less than 0.0001 Lux are undetectable to the human eye. These three regions are distinctive in that the human eye has a different spectral response for each region of intensity.
U.S. Pat. 5,946,641
U.S. Pat. 5,790,432
1 YEAR STANDARD WARRANTY
SOLAR LIGHT COMPANY warrants that the equipment has been carefully tested, inspected and left the Factory in proper working condition, free of visible defects. SOLAR LIGHT COMPANY warrants the equipment to be free from defects in material and workmanship, under normal use and operation, for a period of one (1) year after the date of initial operation, or demonstration; or eighteen (18) months from the date of shipment from the Factory; or whichever occurs first. The warranty is limited to the free replacement of all-defective parts and free labor during the first year of warranty. Defective parts replaced under this warranty shall become the property of SOLAR LIGHT COMPANY. The above stated Warranty is subject to the following conditions: Equipment being installed within the United States of America, Canada, or sold by authorized SOLAR LIGHT COMPANY representatives or their agents outside the continental United States. The equipment being installed is operated and maintained in accordance with SOLAR LIGHT COMPANY’s operating instructions, maintenance instructions and specifications. Utilization of only SOLAR LIGHT COMPANY’s authorized parts and components. The utilization of a duly authorized representative for all work performed on SOLAR LIGHT COMPANY equipment during the warranty period. Any variation(s) to the above warranty must be in writing and mutually acceptable by SOLAR LIGHT COMPANY and the customer. The warranty shall not apply to damages resulting from errors in installation, nor shall it apply to any equipment, which has been subject to damages, alterations or misuse by the purchaser. Parts of the equipment, which would be generally considered as expendable service items during normal use, such as fuses, lamps, detector shields, etc., are not covered under the warranty. THERE ARE NO WARRANTIES, WHICH EXTEND BEYOND THIS DESCRIPTION, AND EXPRESSLY NO IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SOLAR LIGHT COMPANY BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR ANTICIPATED LOSS OF PROFITS SUFFERED BY THE PURCHASER. Extended Warranty Plans are also available.