Relative
spectral response

Closely matches CIE standard observer curves x–(λ), y–(λ), and z–(λ)
Within 6% (f1') of the CIE spectral luminous efficiency V(λ)

Receptor

Silicon photocell

Measurement
functions

Tristimulus values:

XYZ

Chromaticity:

Ev xy, Ev u'v'

Correlated color temperature:

Ev, Tcp, Δuv

Color difference:

Δ(XYZ), Δ(Ev xy), Δ(Ev
u'v'), ΔEvΔu'v'

Other
functions

User calibration function, Data hold function, Multi-point measurement (2 to 30 points)

Measuring range

0.1 to 99,990 lx, 0.01 to 9,999 fcd (Chromaticity: 5 lx, 0.5 fcd or above) in four automatically selected ranges (lx or fcd is swichable)

Accuracy

Ev: ±2%, ±1 digit of displayed value,
xy: ±0.002 (800 lx, Standard Illuminant A measured)

Repeatability

Ev: 0.5% ±1 digit (2σ) 
xy: ±0.0005

Temperature drift

Ev: ±3%, ±1 digit of displayed value
xy: ±0.003

Humidity drift

Ev: ±3%, ±1 digit of displayed value
xy: ±0.003

Response time

0.5 sec. (continuous measurement)

Digital output

USB 2.0 full-speed

Display

4 Significant-digit LCD with back-light illumination

Operating temperature/humidity range

-10 to 40°C, relative humidity 85% or less (at 35°C) with no condensation

Storage temperature/humidity range

-20 to 55°C, relative humidity 85% or less (at 35°C) with no condensation

Power source

2 AA-size batteries / AC adapter (optional)

Battery life

72 hours or longer (when alkaline batteries are used) in continuous measurement

Dimensions

69 × 174 × 35mm

Weight

215g (7.6 oz) not including batteries

Standard accessories

Case T-A10, Cap T-A13, Neck Strap, batteries, Data Management Software CL-S10w, Connecting Cable T-A15

Optional accessories

Receptor Head, Adapter Unit for Main Body T-A20; Adapter Unit for Receptor Head T-A21; AC Adapter AC-308 (available for 1 to 10 Receptor Heads); AC Adapter AC-311 (available for 1 to 30 Receptor Heads), Printer Cable T-A12, Hood CL-A11, Case CL-A10