Pro Lite Technology

SL-3101 Dual Photopic / Scotopic Illuminance Meter

Meter

The SL-3101 Solar Light photometer measures both photopic and scotopic illuminance and automatically computes the S:P ratio of the light source under test. Using two sensor heads connected to a single portable meter, the SL-3101 provides a more meaningful measure of the effective illuminance of light sources under low light level conditions. The measurement of S:P ratio is called for in BS 5489-1:2012 Code of Practice for Design of Road Lighting and in the ILP’s Professional Lighting Guide, PLG 03 (2012).

The Solar Light SL-3101 is a portable and innovative illuminance meter which incorporates a dual sensor head spectrally matched to the CIE photopic and scotopic observer functions to report the S:P lux ratio and better assess the visually-effective performance of street lighting products. This meter is intended to be used by lighting design professionals, researchers, lamp and ballast manufacturers, and energy management consultants.

Applications for the SL-3101 include architectural lighting design, lighting efficiency measurements, energy efficiency design and scotopic / mesopic lighting research.

Meter Specifications

  • Dynamic range: 2.6 x10^6 (6.5 digits)
  • Accuracy: within 0.2% FS
  • Non-linearity: 0.003% integral non-linearity
  • Temperature coefficient: 50 PPM/°C max
  • Sampling rate: 3 per second
  • Screen refresh rate: 10 per second
  • Operating temperature: 0 to 50°C (non-condensing)
  • Batteries: 4xAA alkaline batteries
  • Battery life: >40 hours continuous use
  • External power: 9-12V AC or DC adapter. 100mA min
  • Weight: 18 oz. (510 g)
  • LCD Size: 2.5” x 0.5” (6.4 x 1.3 cm)
  • Program control: 9-button keypad

PMA-2130 Photopic Detector Specifications

  • Spectral response: follows CIE photopic spectral luminous efficiency curve (400-700nm)
  • Angular response: 5% for angles <60°
  • Range: 150,000 lux, 14,000 ft-cd
  • Resolution: 1 lux, 0.1 ft-cd
  • Diameter: 40.6 mm
  • Height: 45.8 mm
  • Weight: 200 grams

PMA-2131 Scotopic Detector Specifications

  • Spectral response: follows CIE scotopic spectral luminous efficiency curve (400-600nm)
  • Angular response: 5% for angles <60°
  • Range: 150,000 lux, 14,000 ft-cd
  • Resolution: 1 lux, 0.1 ft-cd
  • Operating environment: 0 to +50 °C, non-condensing
  • Diameter: 40.6 mm
  • Height: 45.8 mm
  • Weight: 200 grams
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