The Solar Light SnP-meter ^TM Model SL-3101 is a portable and innovative meter. It measures spectral response following the CIE scotopic and photopic action spectrum with on board calculations:

• S/P ratio
• Visually effective light level
• Perceived brightness

This meter is used by lighting design professionals, researchers, lamp and ballast manufacturers, and energy management consultants.

Applications:

• Architectural lighting design
• Lighting efficiency measurements
• Energy efficiency designing
• Scotopic 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 sec.
• 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)
• Size 4”W x 1.75”D x 7.6”H (10 x 4.35 x 19.3 cm)
• LCD Size 2.5” x 0.5” (6.4 x 1.3 cm)
• Program control 9-button keypad

Photopic Detector Specifications:

• Spectral response: Follows CIE photopic spectral luminous efficiency curve (400-700nm) Figure 1
• Angular response: 5% for angles <60°
• Range:
  PMA2130 - 150,000 Lux, 14,000 ft-cd
• Display resolution:
  PMA2130 - 1 Lux, 0.1 ft-cd
• Operating environment: 32 to 120 °F (0 to +50 °C) no precipitation
• Diameter: 1.6" (40.6 mm)
• Height: 1.8" (45.8 mm)
• Weight: 7.1 oz. (200 grams)

Scotopic Detector Specifications

• Spectral response: Follows CIE scotopic spectral luminous efficiency curve (400-600nm) Figure 1
• Angular response: 5% for angles <60°
• Range:
  PMA2131 - 150,000 Lux, 14,000 ft-cd
• Display resolution:
  PMA2131 - 1 Lux, 0.1 ft-cd
• Operating environment: 32 to 120 °F (0 to +50 °C) no precipitation
• Diameter: 1.6" (40.6 mm)
• Height: 1.8" (45.8 mm)
• Weight: 7.1 oz. (200 grams)

Photopic Angular Response	Photopic Spectral Response
Scotopic Angular Response	Scotopic Spectral Response

Technical Papers and Protocols:

> Energy Conservation Using Scotopically Enhanced Fluorescent Lighting In an Office Environment by Office of Energy Efficiency & Renewable Energy - U.S. Department of Energy

>Spectrally Enhanced Lighting Program Implementation for Energy Savings by Pacific Northwest National Laboratory for U.S. Department of Energy

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