Yokogawa Luxmeters/
Lightmeters

Specifications		3281A	3286A	51001	51002
Measuring Range		0 to 30, 0 to 1000, and 0 to 3000 lx	0 to 300, 0 to 10, 0 to 30, 0 to 100 and 0 to 300 lx	0.0~99.9/999/9,990/99,900/999,000 lx
Measuring Cycle		-		Twice Per Second
Accuracy		±7% of reader (23°C±2°C)		≤3,000lx: ±4%+1, >3,000lx: ±6%±1	≤3,000lx: ±2%+1, >3,000lx: ±3%±1
Photoelectric Element		Selenium cell with plastic molding		Silicon photodiode
Characteristics of Oblique Incident Light	Angle of incident:	Correction by globe cover
	10°	within ±1.5%			within ±1%
	30°	within ±3%			within ±2%
	50°	-			within ±6%
	60°	within ±10%			within ±7%
	80°	within ±30%			within ±25%
Applicable Standard		Designed based on JISC-1609-1993 CLASS A		Conforms to general class A of JIS C-1609-2006 CLASS A