Bench-top Spectrophotometer CM-3700A

Konica Minolta’s top of the range spectrophotometer for reflectance and transmittance colour measurement. The best benchtop spectro for customers requiring absolute accuracy of liquid or solid samples. Ideally suited to applications like colour matching or for specification of colour to a global supply chain. The CM-3700A can also measure haze and has an adjustable cut-off uv filter for samples with OBAs.

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Description

“State of the Art” spectrophotometer for maximum performance in colour measurement

The CM-3700A is the proof of Konica Minolta’s leadership in advanced optical technology with a true “State of the Art” instrument. In every detail and without compromise, the CM-3700A is designed for maximum performance and thus to act as reference instrument in a global colour management network. The CM-3700A allows colour measurement of solid, translucent and transparent samples in reflectance and transmittance.

The entire optical system is designed and manufactured without compromise, and exceed the requirements of international standards while offering superior level of inter-instrument agreement out of the production line.

The superiority of the CM-3700A in terms of absolute accuracy and long term stability, especially on very dark or high chromaticity colours has been recognised by top ranking institutes and leading companies throughout the colour industry.

Features

Reference grade bench-top spectrophotometer for reflectance and transmittance colour measurements

The CM-3700A is the flagship model from Konica Minolta meeting highest expectations in absolute accuracy, short- and long-term stability and unsurpassed inter instrument agreement levels to act as reference instrument in a global colorimetric network. The two flat holographic gratings with silicon photodiode arrays, one each for the sample and feedback channel, together with the high power xenon flash ensures highest absolute accuracy and repeatability, especially on very dark and high chromaticity shades. The entire optical system is mounted on a stainless steel casted chassis to avoid temperature drift.

 

Reflectance Measurements

The motorized gloss trap, controlled by the optional software, allow measurements of samples with (SCI) and without (SCE) surface conditions. Measurement area can be selected from Ø 25.4 mm, Ø 8 mm, and 3 x 5 mm to match the sample size.

For measurement of samples treated with optical brightness (OBA), the UV cut filter allows motorized adjustment of UV content for measurements of materials such as pulp, paper textiles and other materials containing OBA’s.

 

Transmittance Measurements

To measure transparent or translucent solid samples such as plastic sheets or as well as transparent liquids, the large and accessible transmittance chamber offers high flexibility.

Specifications

Model Spectrophotometer CM-3700A
Illuminating/viewing system d:8° (diffused illumination; 8° viewing angle); switchable: di:8° SCI (specular component included) or de:8° SCE (specular component excluded; meets ISO and DIN standards for d:8° geometry; also meets CIE and ASTM standards for d:0° geometry. Transmittance: d:0° (diffuse illumination/0° viewing angle)
Detector Silicon photodiode array with flat holographic grating
Wavelength range 360 nm to 740 nm
Wavelength pitch 10 nm
Half bandwidth Approximately 14 nm average
Measurement range 0 to 175 % (Reflectance or transmittance); Output/display resolution: 0.01%
Photometric range Pulsed xenon arc lamp
Measurement time 0.6 to 0.8 sec. (to start of data output)
Illumination/measurement areas Reflectance: Changeable between LAV, MAV, and SAV
LAV: Ø 28 mm illumination / Ø 25.4 mm measurement
MAV: Ø 11 mm illumination / Ø 8 mm measurement
SAV: 5 × 7 mm illumination / 3 × 5 mm measurement
Transmittance: Approx. Ø 20 mm
Repeatability When white calibration plate is measured 30 times at 10-sec. intervals after white calibration has been performed: ;
Spectral reflectance: Standard deviation within 0.05%
Chromaticity: Standard deviation within ΔE*ab 0.005
When black tile (BCRA Series II; reflectance: 1%) is measured 30 times at 10-sec. intervals after white calibration has been performed:
Spectral reflectance: 380 to 740 nm: Standard deviation within 0.02%
360 and 370 nm: Standard deviation within 0.04%
Chromaticity: Standard deviation within ΔE*ab 0.05
Inter-instrument agreement (LAV) Mean ΔE*ab 0.08 (typical) Average for 12 BCRA Series II color tiles.
Max ΔE*ab 0.3 (corresponds to ΔECMC 0.2) for any of 12 BCRA Series II color tiles compared to values measured with master body
Temperature drift Spectral reflectance: Within ±0.10%/°C
Color difference: Within ΔE*ab 0.05/°C
UV adjustment Computer controlled; continuously variable
Specimen conditions for transmittance measurements Sheet, plate, or liquid form up to a maximum thickness of approximately 50 mm and unlimited sample length
Interfaces USB 1.1
Power AC 100 to 240V 50/60Hz 25VA (using included AC adapter)
Operating temperature/humidity range 13 – 33°C, relative humidity 80% or less (at 33°C) with no condensation
Storage temperature/humidity range 0 – 40°C, relative humidity 80% or less (at 35°C) with no condensation
Dimensions (W × H × D) 271 × 274 × 500 mm (10-11/16 x 10-3/4 x 19-11/16 in.)
Weight 18 kg (39.7 lb.)
Standard accessories White Calibration Plate; Target Mask (3 × 5 mm); Target Mask (Ø 8 mm); Target Mask (Ø 25.4 mm); Zero Calibration Box; AC Adapter; USB Cable (3 m); Accessory Case; Dust Cover
Optional accessories ΔE*ab (CIE 1976), ΔE*94 (CIE 1994), ΔE00 (CIE 2000), ΔE (Hunter), CMC (l: c)
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