La description

Yokogawa digital lux meters offer: Wide measurement range, high accuracy Spectral response characteristics for visible range Good oblique incident light characteristics USB communication and USB power supply Recorder output
Specification
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: 100k&Omega, 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
(*) At?23±2°C Accuracy: ±% of reading ± effective min. digit''