For Color and Appearance

• Introduction
• Features
• Specifications

Specifications

Model	Chroma Meter CR-241
Type	Reflected-light colorimeter
Receptors	6 silicon photocells (3 to measure source illumination, 3 to measure reflected light) filtered to detect primary stimulus values for red, green, and blue light
Spectral response	Closely matches CIE 1931 Standard Observer curves (x2l, yl, and zl)
Light source	Pulsed xenon arc lamp
Illumination/measurement system	45° illumination angle (circular illumination)/ 0° viewing angle
Measuring area	ø0.3mm or ø1.8mm (interchangeable)
Viewfinder optical system	Single-lens-reflex (viewing system automatically replaced by measurement); viewfinder magnification: approx. 47X; eyepiece adjustment: -9 to +3 diopters
Field of view	2.5 x 4.1mm with indications for ø0.3 and ø1.8mm measuring areas
Measurement modes	Absolute and difference
Chromatic systems	Absolute: CIE Yxy, L*a*b*, and L*C*H°, Munsell notation (Illuminant C only); colorimetric refection densities DxDyDz Difference: Δ(Yxy), Δ(L*a*b*)/ΔE*ab, Δ(L*C*H*)/ΔE*ab, and density difference Δ(DxDyDz)
Illuminant conditions	CIE Illuminant C or D65
Calibration channels	20 for each measuring area; channel 00 for white calibration plate, channels 01 to 19 for user-selected reference colors; meter can automatically select calibration channel with color coordinates closest to measured color; calibration channel may also be selected manually if desired
Target-color channels	20 for each measuring area; set by measurement or keyboard input
Data memory	Space for 300 sets of measurement data; space divisible into 20 pages; data remains in memory even if meter power switched off
Display range	0.01 to 160% reflectance
Measurement time	Approx. 1 to 3 seconds (depending on chromatic system selected)
Weight	215g (7.6 oz.) not including batteries
Short-term repeatability	Chromaticity (x,y): Within 0.0002; Color difference (ΔE*ab): Standard deviation within 0.07 (Measurement subject: white calibration plate)
Temperature drift	ΔE*ab: Less than 0.05/°C
Display	Dot matrix LCD (Liquid-crystal display) with adjustable viewing angle; 16 characters x 2 lines
Printer	24 character thermal dot
Statistical calculations	Maximum, minimum, mean, and standard deviation
Calendar/clock/timer	Date (month, day) and time (hour, minute, second) of first and last measurements on each page can be stored and printed out; timer intervals user-selectable between 3 sec. and 99 min.
Data input/output	RS-232C format, ASCII code; baud rate:300, 1200, 2400, 4800, 9600 bps (selectable by DIP switch; 9600bps for data output only; 4800bps set at factory); RS-232C terminal uses DIN 8-pin connector
Other	High repeatability, multiple-measurement-averaging mode; alarm function (with alarm output socket) indicating color difference outside user-selected range
Power source	Included AC adapter; memory backed up by built-in Ni-Cd battery
Temperature range	Operation: 0 to 40°C (32 to 104°F); Storage: -20 to 55°C (-4 to 131°F)
Specimen stage	Size: 110 x 80mm (4-5/16 x 3-1/8in); range of motion: 15mm (9/16 in.) in X (left/right) and Y (back/forth) directions, 50mm (1-15/16 in.) in Z (vertical) direction
Dimensions	230 x 414 x 296mm (9-1/16 x 16-5/16 x 11-5/8 in)
Weight	8.0kg (17.6lb)
Accessories included	White Calibration Plate CR-A48, AC adapter AC-A10, thermal paper (1 roll), DIN 8-pin plug (1), 3.5mm subminiature plugs (2), lens cap, dust cover
Optional accessory	Carrying case

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