| 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) |