ST520/ST520S/ST522

ST520 is a chroma meter with precision measurement of luminance and color temperature for broad light sources. ST520S is a chroma meter with precision measurement of luminance and color temperature for LED light sources. ST522 is a chroma meter with precision measurement of luminance and color temperature for multiple light sources with selection function. Each of them meets CIE (International Commission on Illumination) photopic spectral response and the color temperature.
  • ST520S
  • ST522
  • ST520
- DETAIL -
FEATURES
  • Precision instrument for light luminance and color coordinate.
  • Meet CIE (International Commission on Illumination) photopic spectral response.
  • Color temperature or Correlated color temperature.
  • Custom reference value of color difference mode.
  • Lux or foot-candle unit selection.
  • Magnetic mount.
SPECIFICATIONS
 
Model name ST520 ST520S ST522
Light Source General Source LED Source Source Selectable 
Measuring Function IlluminanceEv (lx or fcd)
Color Coordinate
(x, y) , (u', v') (CIE 1960)
Correlated Color Temperature
CT, uv
Color Difference
(Ev,x,y) , (Ev,u',v') ,
(
Ev,u'v') , (One set of reference color)
IlluminanceEvlx or fcd
Color Coordinate:(x, y,u', v')(CIE 1960
Correlated Color TemperatureCT, uv
Color Difference
:(⊿Ev, x, y,(⊿Ev, u', v',
(⊿Ev,CT,u'v')(One set of reference color
Measuring Range Ev0~80,000 lx (0~7,432 fcd)    CT99,990 K Max.
Accuracy
(at 25°C/ 77°F, 60% RH)
Ev± 5%(3,000 lx, standard illuminant A measured)
x, y
± 0.02(100 lx, RGB LED Light)
Ev±3%+2 Digital)(3,000 lx, standard illuminant A measured
x, y± 0.02 100 lx, RGB LED Light
CT± 4 %
Resolution Ev1(0~9,999)10(Over 10,000), lx ;  0.1(0.0~999.9)1(Over 1,000), fcd ;
CT
1(0~9,999)10(Over 10000), K ; x, y0.001 ; u', v'0.001
Response Time Approx. 1 sec.
Temperature Drift Ev±5%+2 Digital)(3,000 lx, standard illuminant A measured
x, y± 0.008100 lx, RGB LED Light
Humidity Drift Ev±3%+2 Digital)(3,000 lx, standard illuminant A measured
x, y± 0.005100 lx, RGB LED Light
Operation Temperature 0°C to 50°C (32°F to 122°F)Less than 80% RH
Store Temperature -10°C to 60°C (14°F to 140°F)Less than 85% RH
Weight 179g(6.3 oz.) without battery
Dimensions Main Instrument140x49x29 mm(5.5"x1.9"x1.1")      Sensor Probe165x50x36mm(6.5"x2.0"x1.4")
Accessories 9V Battery, Instruction manual, Carrying case, Sleeve