Model	51011	51012	51021
Standard	Conforms to class A of JIS C1609-1 2006 "Illumination Meter"		Conforms to class AA of JIS C1609-1 2006 "Illumination Meter"
Photoelectric element	Silicon photodiode
Display	Liquid crystal display (number of 7 digits); maximum effective display:999; (0 or 0's to indicate the number of digits)
Measurement cycle	Twice per second
Measuring range	0.0 to 99.9/999/9,990/ 99,900/999,000lx		0.00 to 9.99/99.9/999/9,990/ 99,900/999,000lx
*Accuracy()**	±4% rdg ±1dgt (under 3000lx) ±6% rdg ±1dgt (over 3000lx)	±2% rdg ±1dgt (under 3000lx) ±3% rdg ±1dgt (over 3000lx)
Response time	Automatic range : 5 sec; Manual range: 2 sec
Fatigue characteristics	±2%	±1%
Temperature characteristics	±5%	±3%
Characteristics of oblique incident light	Angle of: 10° ±1.5% 30° ±3% 60° ±10% 80° ±30% (deviation from cosine characteristics)	Angle of: 10° ±1% 30° ±2% 50° ±6% 60° ±7% 80° ±25% (deviation from cosine characteristics)
Characteristics of visible region relative spectral response	Devation from the standard spectral luminous efficiency: f1' within 9 %	Deviation from the standard spectral luminous efficiency: f1' within 6 %
Operating temperature / humidity	-10 to 40°C 80% RH or less; no moisture condensation
Function	Response switching, Range Hold, Timer Hold, Deviation display, Auto power off		Response switching, Range Hold, Timer Hold, Deviation display, Auto power off, Color correction factor setting,Average illuminance computation, Ripple measurement, Light source luminous intensity measurement, Measurement of totalized intensity of illumination
Communication	USB
Output	DC 1V ±5% (fixed range); load resistance: 100kO or more
Dimensions, weight	Approx. 67(W) x 177(H) x 38(D) mm; Approx. 260g
Power supply	AA (LR6) x 2 OR USB supply (5 VDC ±5%)
Accessories attached	Instruction manual; dry cell (built in); soft case; recorder output plug

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