Manufacturer: Yokogawa Meters & Instruments Corporation
Yokogawa Digital Lux Meter 51012
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: 100kΩ 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
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: 100kΩ 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