Sekonic Light Meter: C-7000 SpectroMaster Exposure Meter

International Catalog Number JT50 (lx only, display language is Japanese/English/Chinese) JT52 (lx & fc, display language is Japanese/English/Chinese) US Catalog Number 401-710 (lx & fc, display language is Japanese/English/Chinese)

C-7000

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C-7000 SpectroMaster - Features

Spectrum Comparison Mode

Color Rendering Index Mode

CIE1931 (CIE1964) and CIE1931 (CIE1964) Comparison Mode

CIE1976 and CIE1976 Comparison Mode

Memory Management

Custom Settings Mode

C-7000 Series Utility (software)

Precise Measurement

Measures LED, HMI, Fluorescent, Tungsten, Natural Light and Flash in 1 nanometer (nm) output wavelength increments from 380 to 780 nm. It conforms to requirement of “Illuminance meter class” for JIS C 1609-1: 2006 “Illuminance meters Part 1: General measuring instruments” Class A, and DIN 5032 Part 7 Class C.
Wide Measurement Range of Color Temperature and Illuminance Wide measurement range of Color Temperature (1,563 to 100,000K) and illumination (1 to 200,000lx = 0.1 to 18,600fc in ambient light, 20 to 20,500lx • s = 1.86 to 1,900fc • s in flash light)

Flash Measurement

Because of it’s sophisticated and unique accumulation-type sensor, the C-7000 is the world’s first^*, stand-alone industrial spectrometer designed to measure flash light color. Flashes may be trigger by connected PC cable or cordlessly.

*As of August 2015, by research of Sekonic Corporation

User-friendly Design

Simply tap the intuitive color touch screen to open a measuring display mode. Return to the home screen at any time by tapping the Mode Icon on the display screen in use or pressing the Menu Button on the meter. The pressure-activated design of the screen enables easy use with gloves in cold weather.

270° horizontal swivel head enables using the meter in a convenient and comfortable manner.

Dark calibration is achieved by simply turning the Light Selection Ring to the calibration Icon. No need to worry about losing the cap. (Dark Calibration internal mechanism exclusive Sekonic design – patent pending.)

Text Screen Mode


The TEXT screen displays user selected measurement values. Touch the display button.		Display Item Library Screen Make a selection from the Library. Display items that you need in the order you want them.		Measurement values appear and are updated after every reading next to their light measurement values.

Data Library

Tcp	Correlated Color Temperature
Δ uv	Deviation from Kelvin
X,Y,Z	Tristimulus Value (X ,Y ,Z , / X₁₀, Y₁₀, Z₁₀)
x,y,z	CIE1931(CIE1964) Chromaticity Coordinates (x, y, z / x₁₀, y₁₀, z₁₀)
u’, v’	CIE1976 Chromaticity Coordinates (u’, v’ / u’₁₀, v’₁₀)
λd	Dominant Wavelength
Pe	Excitation Purity
λp	Peak Wavelength
Lux	Lux – ambient light: HLx(Lux sec) - flash light
fc	FootCandle - ambient light: Hfc – flash light
PPFD	Photosynthetic Photon Flux Density (μmolm^-2s^-1)
CRI	Ra (average of R1- R8), plus R1 to R15

Spectrum Mode (With Enlargement)

Displays user-selected data set in library.
Graphed Spectrum is displayed for a single
reading or for continuous monitoring.
Final measurement can be displayed as
a graph with data or graph in full screen

Spectrum Comparison Mode

Spectrum Comparison creates a three light over-lay comparison with Correlated Color Temperature (Tcp) and Deviation (Δ uv) values. Current = Spectrum Memory 1 = Yellow Outline Memory 2 = Pink Outline

Color Rendering Index Mode

The CRI (Color Rendering Index) displays the selected value (Ra, or individual R1 to R15) numerically or in a bar graph to show how accurately different colors will be reproduced.
Ra is the average of R1 to R8.
R1 to R8 is General CRI.
R9 to R15 is Special CRI.

Ra Average R1 - R8

CIE1931 (CIE1964) and CIE1931 (CIE1964) Comparison Mode

Displays the measurement result in three selected text format together with the position of x, y (or x₁₀, y₁₀) chromaticity coordinate on the CIE1931 (or CIE1964) chromaticity diagram. When 2 degrees of field of view is selected in Hardware Setting, this mode shows CIE1931. CIE1964 appears when 10 degrees of field of view is selected.

Chromaticity coordinate comparison creates three measurement points (cross marks), comparing two stored measurements against a current reading displaying x₁₀,y₁₀ chromaticity coordinate values. Up to 999 measurements can be stored in the meter’s memory.

CIE 1931 Spectrum and CIE 1931 Spectrum Comparison Modes

CIE1976 and CIE1976 Comparison Mode

Displays the measurement result in three selected text format together with the position of u', v' (or u'₁₀, v'₁₀) on the Uniform Chromaticity Scale defined in 1976 by CIE. It is intended to provide a perceptually more uniform color spacing for colors at approximately the same luminance.

Chromaticity coordinate comparison creates three measurement points (cross marks), comparing two stored measurements against a current reading displaying u'₁₀, v'₁₀ chromaticity coordinate values. Up to 999 measurements can be stored in the meter’s memory.

CIE1976 UCS Spectrum and CIE1976 UCS Comparison Modes

Memory Management

Memory function

C-7000 stores up to 999 memories with user generated title. This enables storing full light-source information for checking the deterioration of a single light or comparison between multiple lights
Memory functions include: Memory Recall, Rename and Clear
Memorized values are used for each Comparison mode (Spectrum Comp. CIE1931 Comp. and CIE1976 Comp.)

Custom Settings Mode

You can customize the C-7000 display to your operating preferences. The current setting for each item is displayed in yellow letters on the setting button.

C-7000 Series Utility (software)

C-7000 Utility (in CD-ROM included with the meter or available on www.sekonic.com) offers evaluating the memorized data, easy meter setting from a computer, and updating firmware of the meter and more.


Evaluate and output the memorized data. Graph (Spectrum, CRI, CIE1931/1964 and CIE1976) in JPEG, BMP or PNG format


CSV file (all measurement values and spectral irradiance in 1nm/5nm increments