Portable Colour and Gloss Meter CM-25cG

Portable spectrophotometer with 45°c:0° geometry and true 60°-gloss-sensor

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Description

The new CM-25cG is the successor to the CM-2500c which is the standard model for interior trims in the automotive industry. The CM-25cG is an even more compact and lightweight portable spectrophotometer with 45°c:0° geometry and a true high performance 60°-gloss-sensor. The 45°:0° geometry used is renowned for providing colour values offering excellent correlation to visual perception. This is achieved by fully excluding surface effects of gloss and/or texture. The built-in gloss-sensor accurately measures surface gloss.

With no compromises in performance, the CM-25cG has been designed to match or exceed standards for colour and gloss measurement in a number of industries, including automotive interior materials and high visibility textiles (EN471) or coatings).

Being fully compatible to the previous CM-2500c model, the CM-25cG’s perfect circular optical system (defined as 45°c:0°) achieves high accuracy and repeatability, especially on textured or structured surfaces, regardless of measurement direction. Not only does it measure colour, but also true 60°-gloss at the same time and, as a world premiere, not only for standard MAV aperture size (8mm) but also for small measurement areas with 3mm spot size.

The CM-25cG is lightweight and uses a large and easy-to-read colour display to show and manage measurement data either numerically or graphically. For correct positioning on a sample, the CM-25cG is the first device offering a true optical sample viewer in a 45°:0° geometry instrument.

Features

Innovative optical system combining colour and gloss measurements for unsurpassed accuracy and repeatability

With it’s innovative combination of 45°:0° geometry and true gloss sensor for even the smallest parts the CM-25cG enhances the flexibility and accuracy to match visual perception. It consists of a mixing box (integrating sphere) with an innovative poly-mirror system to create a near-ring shaped illumination on the sample with an embedded 60° gloss-sensor which conforms to ISO standards.

Compared to the typical 45°:0° geometry used in other spectrophotometers, the benefits of the optical system used in the CM-25cG results in significantly improved repeatability as well as inter-instrument and superb inter-model-agreement to the CM-2500c series. The innovative optical system eliminates directional dependency and minimizes the influence of changes in measuring position, instrument rotation, sample positioning and sample inclination. This offers important advantages on frosted, textured and structured material surfaces such as plastic parts used in automotive interior trims.

With its lightweight ergonomic design, optional Bluetooth® and high-resolution colour display, the CM-25cG is perfectly suited for applications in the production environment. It sets a new standard for an instrument that is easy and fast to handle and able to filter stored data based on group sorting by additional information (tagging) and measure data in less than 1 second.

CM-25cG: State of the Art on all Agreement levels

The CM-25cG was developed in close cooperation with major car markers with the aim, to reduce the exchange of physical samples with suppliers while at the same time keeping historical data, to allow the user to communicate measurement data based on absolute values enabling true “Digital Colour Data Management” throughout the value chain.

By default, all CM-25cG are true Close Tolerance (CT) grade instruments, and thus Konica Minolta proves once more it’s unsurpassed ability and know-how in optical precision technology. Highest Inter-Instrument-Agreement (IIA) levels of just ∆E*ab 0.15 (Average on 12 BCRA tiles) series as well for Inter-Model-Agreement (IMA) to the CM-2500c series define a new level of performance.

Functions and features

  • Unique 45°c:0° geometry with gloss measurement and optical sample preview
  • Two measurement areas: MAV (8mm) and SAV (3mm) for colour and gloss in one instrument
  • Xenon Flash illumination for best accuracy on dark colours
  • Measurement speed <1s
  • 360-740 nm wavelength range, 10 nm resolution
  • Lightweight (~600g with battery), compact and rugged for on-site measurements
  • Connectable via USB and optional Bluetooth®
  • Large and easy-to-read high-resolution 2.7” colour display
  • Group sorting of data by user-definable tags

Specifications

Model CM-25cG
Colour Gloss
Illumination/viewing system 45°c:0° method (45° circumferential illumination, 0° vertical viewing)
CIE No.15, ISO 7724/1, ASTM E179, DIN 5033-7, JIS Z 8722 compliant		 60° ISO 2813, ISO 7668, ASTM D523, ASTM D2457, DIN 67530, JIS Z8741, JIS K5600 compliant optical system
Detector Dual 40-element silicon photodiode arrays Silicon photo diode
Spectral separation device Planar diffraction grating
Wavelength range 360 nm to 740 nm
Wavelength pitch 10 nm (approx. 10 nm FWHM)
Reflectance range 0 to 175%, resolution: 0.01% 0-200 GU; Output/display resolution：0.01 GU
Light source Pulsed Xenon Lamp White LED
Measurement time Approx. 1.0 second
Minimum interval between measurements Approx. 2.0 seconds
Battery performance Standalone: Approx. 3000 measurements (at 10s intervals at 23°C)

Bluetooth®: Approx. 1000 measurements (at 10s intervals at 23°C)
Measurement/illumination area MAV: Ø8.0 mm / 12 x 16 mm

SAV: Ø3.0 mm / 12 x 16 mm

 MAV: Ø10 mm

SAV: Ø3.0 mm
Repeatability Standard deviation within ΔE*ab 0.04 (Measurement conditions: White calibration plate measured 30 times at 10-second intervals after white calibration was performed) 0 – 10 GU:
±0.1GU10 – 100 GU:
±0.2GU 

>100 GU:
±0.2%
Inter-Instrument Agreement Within ΔE*ab 0.15 (Average for 12 BCRA Series II color tiles compared to values measured with master body at 23°C) Gloss value (MAV):

0 – 10 GU:
±0.2GU

10 – 100 GU:
±0.5GU

(MAV.  Compared to values measured with a master body under Konica Minolta standard conditions)
Interface USB 2.0 Standard, Bluetooth® Optional
CIE Observer 2° and 10° CIE standard colorimetric observer
CIE Illuminants A, C, D50, D65, F2, F6, F7, F8, F10, F11, F12, ID50, ID65, User illuminant
(simultaneous evaluation with two light sources possible)
Display data Spectral values/graph, colorimetric values/graph, colour difference values/graph, PASS/FAIL judgment, pseudo colour, colour assessment
Color space /
Colorimetric data		 XYZ, Yxy, CIELAB, CIELCh, HunterLAB, ∆E*ab, ∆E94, ∆E00, CMC (I:c), ∆EHunter, MI, Munsell, WI (ASTM E313-73/96; CIE(WI/Tint)), YI (ASTM E313-73/96; ASTM D1925), ISO Brightness
Data memory Targets: 2500

Samples: 7500
Power source Rechargeable Lithium-Ion battery, USB bus power
Dimensions
(W × H × L) [mm]		 81 x 81 x 224
Weight [g] Approx. 600 (with battery)
Display languages English, French, German, Italian, Polish, Portuguese, Russian, Spanish, Turkish, Chinese (simplified), Japanese
Display 2.7-inch TFT color LCD
Operating temperature / humidity range 5 – 40°C, relative humidity 80% or less (at 35°C) with no condensation
Storage temperature / humidity range 0 – 45°C, relative humidity 80% or less (at 35°C) with no condensation
Standard accessories Calibration stage, Lithium-Ion battery, flat-type battery cover, wrist strap, USB cable, USB power supply
Optional Accessories Hard case, Battery charger and spare batteries, stapler-type target mask, Bluetooth® module, SpectraMagic™ DX software
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