Home Hardware Measuring Instruments Light and Display Measurement Illuminance Meters CL-70F

CRI Illuminance meter CL-70F used to measure light sources, including LED lighting and EL lighting

CRI Illuminance meter CL-70F with a rotating receptor head to improve screen visibility and comfortable use of the instrument

CL-70F

An entry-level solution for measurement of Colour Rendering Index, spectral irradiance, peak wavelength, tristimulus values, chromaticity, correlated colour temperature, dominant wavelength, excitation purity, illuminance, and difference values.

CRI Illuminance Meter for measuring colour & illuminance of light sources
Wavelength range 380 – 780 nm
Data output: CRI, Tristimulus, dominant wavelength, excitation purity, correlated colour temperature
Conforms to DIN 5032 Part 7 Class C

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Cost Effective solution for measuring light-source colour and illuminance

The CRI Illuminance meter CL-70F is a compact, lightweight, handheld instrument for measuring the colour and illuminance of light sources (including new LED and EL light sources). Measurement data is displayed in terms of illuminance, chromaticity, CRI, tristimulus values, dominant wavelength, excitation purity, correlated colour temperature, and difference values from a target.

The CL-70F can be used with a commercially available flash sync cable to take spectral measurements of photographic flashlights.

The utility software CL-SU1w is included as standard and adds further functionality for capturing and analysing data.

Principal applications

Measurement and evaluation of special illumination sources used for restaurants, museums, studios, and stages, etc.
Measurement and evaluation of indoor light sources such as LEDs, fluorescent lamps, etc.
LED billboard development, quality control, and maintenance
Evaluating the illuminance distribution characteristics of LED modules or lighting fixtures
Building and interior lighting research
Spatial lighting production and adjustment
Colour-viewing cabinet maintenance
Projector light source research and colour inspection
Checking environments for psychological research experiments

Features

Designed for in-field use: Portable instrument with rotating sensor head and touch screen for ease of operation. The head can be rotated so that the display has maximum visibility in any lighting conditions. The instrument is battery powered.

Entry level spectral sensor: Entry level access to CRI measurement data, peak wavelength, dominant wavelength, spectral curve. The instrument reports at 10nm which provides sufficient detail for most users.

Easy measurement of correlated colour temperature: data is measured for correlated colour temperature (Tcp) and difference from the blackbody locus (Δuv).

CL-70F CRI Illuminance Meter

Specifications & Downloads

Specifications

Model	CRI Illuminance Meter 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 nm ～ 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 Illuminant A) ^{1 2}	E_V: ±5%+1digit of displayed value
Accuracy (Standard Illuminant A) ^{1 2}	xy: 0.003 (at 800 lx)
Repeatability (2σ) (Standard Illuminant A)	E_V: 30 to 200,000 lx: 1%+1digit; 1 to 30 lx: 5%+1digit ^*3
Repeatability (2σ) (Standard Illuminant A)	xy: 500 to 200,000 lx: 0.001 ^4 xy: 100 to 500 lx: 0.002 ^4 xy: 30 to 100 lx: 0.004 ^4 xy: 5 to 30 lx: 0.008 ^4
Visible-region relative spectral response characteristics (f1’)	Within 9%
Cosine response (f2)	Within 6%
Temperature drift (fT)	E_V: ±5% ; xy: ±0.006
Humidity drift (fH)	E_V: ±3% ; xy: ±0.006
Power	2 AA-size batteries (Alkaline batteries or manganese dry cells); 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) ^*5
Color indication modes	Correlated colour temperature Tcp, Difference from blackbody Δuv, XYZ, xy, u'v', Dominant wavelength λd, Excitation purity Pe, Spectral irradiance, EV, CRI (Ra, Ri), Peak wavelength λp, 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
Operating temperature and humidity range	-10 to 40℃, relative humidity of 85％ or less (at 35℃) with no condensation
Storage temperature/humidity range	-10 to 45℃, relative humidity of 85％ or less (at 35℃) with no condensation
Size	73 (W)× 183 (H) × 27 (D) mm (Not including projecting buttons)

^*1Measurement mode: Constant light (range L), Exposure time：AUTO
^*2Linear for EV
^*310 times measurement (2σ) /Ave
^*410 times measurement (2σ)
^*5Shutter speed Specifications are subject to change without prior notice.

CL-70F Illuminance Meter Catalog

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Software

Software CL-SU1w

CL-SU1w Utility Software is the utility software included as a standard accessory with the CRI Illuminance Meter CL-70F, and offers numerical and graphical display and analysis of measurement data.

Upgrade procedure
CL-SU1w Utility Software can be updated by following the procedure in Section 7.6 "Update screen" on p. 35 of the Software Guide for "CL-70F Utility". Please refer to that procedure to perform the update.

Updating of CL-SU1w Utility Software can be performed only from within the software itself. No update file is offered for download from this site.