The CL-70F CRI Illuminance Meter is an entry-level solution for the measurement and evaluation of the illuminance, color temperature, and color rendering index (CRI) of various illumination sources such as LEDs and fluorescent lamps. It is most commonly used in restaurants, museums, studios, and theaters for accurate light measurements. Its high-resolution CMOS sensor captures and displays the spectral power distribution of current and future generation light sources including LEDs, HID, Halogen, and OLEDs providing unparalleled color measurement accuracy.

The CL-70F, a cost-effective spectrometer based illuminance meter, uses an accumulation type sensor to measure electronic flash. CL-70F can display color data for accurate CRI, color temperature and spectral color precision. The electronic flash can be measured with a PC cord connection or in cordless mode.

The various display modes on its large color touch screen enables simple navigation, quick selection and easy to read measurements and spectral data. Users can customize the display items, according to their needs.

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CRI顯色指數測量 CL-70F可輕鬆處理CRI測量數據。其通過簡單的條形圖顯示包括所有單獨指數(R1至R15)在內的Ra值。
輕鬆測量相關色溫(Tcp) CL-70F可以測量相關色溫以及與黑體軌跡Δuv(常用於描述光源色彩的值)的差異。光線的色溫被定義為黑體可發出特定顏色光線時的絕對溫度(單位:Kelvin)。通過黑體在不同溫度下發出的光線色彩繪製而成的曲線則被稱為“黑體軌跡”。由於許多光源的輸出均無法與黑體曲線完全契合,因此便使用“相關色溫”來描述其色彩。
旋轉式探頭 旋轉式探頭改善了屏幕的可視性,讓儀器的使用更加舒適。
*免探頭蓋零位調整 逆時針轉動擴散器上的轉環可執行暗場校準
實用軟件CL-SU1w提供附加功能 使用作為標準配件隨附的CL-SU1w軟件,可以修改儀器設置、存儲和分組數據,以及進行測量數據的深度分析。
Model CL-70F
Illuminance meter class Conforms to requirements for Class A of JIS C1609-1:2006 "Illuminance meters Part1:General measuring
instruments; Conforms to DIN 5032 Part 7 Class C
Sensor CMOS linear image sensor
Spectral wavelength range 380 to 780 nm
Output wavelength pitch 1 nm
Measuring range Constant light: 1 to 200,000 lx; 1,563 to 100,000 K
(Chromaticity display requires 5 lx or more)
Flash light: 20 to 20,500 lx・s; 2,500 to 100,000 K
Accuracy  (Standard illuminants A) Ev (Illuminance) : +-5%+-1 digit of displayed value
xy: 0.003 (at 800 lx)
Repeatability (2 σ) (Standard illuminant A) Ev: 30 to 200,000 lx: 1%+1digit; 1 to 30 lx: 5%+1digit
xy: 500 to 200,000 lx: 0.001
xy: 100 to 500 lx: 0.002
xy: 30 to 100 lx: 0.004
xy: 5 to 30 lx: 0.008 
Visible-region relative spectral response characteristics (f1') Within 9%
Cosine response (f2) Within 6%
Temperature drift (fT) Ev: +-5% of displayed value; xy: +-0.006
Humidity drift (fH) Ev: +-3% of displayed value; xy: +-0.006
Power 2 AA-size batteries (Alkaline batteries or manganese drycells); USB bus power
Response Time Constant light (Maximum): 15 sec
Constant light (Minimum): 0.5 sec
Flash light: 1 ~ 1/500 sec (in 1-step intervals)
Color indication modes Correlated color temperature Tcp, Difference from blackbody Δ uv, XYZ, xy, u'v', Dominant wavelength λ d, Excitation purity Pe, Spectral irradiance, Ev, CRI (Ra, Ri), Peak wavelengthλ p, exposure value
Other functions Data memory: 999 data; Preset function; Auto power off function
Display languages English, Japanese, Chinese (Simplified)
Interface USB 2.0 Mini B
Operation temperature/humidity range -10 to 40°C, relative humidity of 85% or less (at 35°C) with no condensation
Storage temperature/humidity rangen -10 to 45° C, relative humidity 85% or less (at 35° C) with no condensation
Dimensions (W x H x D) 73 x 183 x 27 mm (Not including projecting buttons)
D (max): 40mm
Weight 230 g