CS-100A Luminance Colorimeter

Konica Minolta CS-100A Luminance Colorimeter

An affordable & portable tristimulus spot colorimeter

The Konica Minolta CS-100A is a portable tristimulus spot colorimeter with a 1° field of view and SLR viewing optics. It is our least expensive colorimeter for display and light source measurements and reports brightness in cd/m2 and CIE chromaticity in the 1931 x y system. The CS-100A can also report colour difference and can be used for reflected luminance measurements.

Low Glare SLR Viewing Optics

Convenient SLR viewing optics allow the operator to view through the meter to target the spot on the device under test for luminance and colour measurements. The CS-100A features a 9° field of view with a black spot in the centre of the field that corresponds to the 1° measurement spot. The operator focusses the lens on the front of the meter on the device under test and aligns the black spot over the desired area on the light source. It is important that luminance meters only collect light from the intended spot and not inadvertently receive light from the surrounding area. This phenomonon is called "glare" and the stray light that results can seriously corrupt measurements of the contrast ratio of a display. Fortunately, the CS-100A suffers from very low stray light with a flare factor of less than 1.5%.

Up Close & Personal

With a minimum focal distance of 1014mm, the CS-100A provides for a 1° field of view and measurement spot size of ø14.4mm. For certain light sources (for example, LED indicators and instrument panel legends), smaller measurement spots are required. To reduced the measurement area, the CS-100A is available with a chioce of four optional close-up lenses. These bring the minimum spot size down to a minimum of ø1.3mm.

Many Advanced Features

The CS-100A includes the facility to calibrate the meter against a user-selected reference source, and a numerical colour correction factor can be entered to compensate for the different spectral power distributions from a variety of light sources. The CS-100A can report colour difference and can also be used for reflected luminance and colour measurements. For connection to a PC, an RS-232C (serial) interface is fitted, while the CS-S10w Professional Data Management Software is available as an optional accessory. The ease-of-use of the meter can be enhanced with an optional angled view finder which allows the operator to look down rather than have to stoop to view through the standard view finder. A long eye-relief eyepiece is also available which allows the operator to look through the view finder from a distance of 5cm away.

Data Management Software

The optional CS-S10w professional data management software provides for expanded measurement and analysis capabilities. In addition to the CIE x y 1931 chromaticty coordinates, the CS-S10w software reports the CIE u' v' 1976 UCS chromaticity, the XYZ tristimulus values, the correlated colour temperature and the dominant wavelength for the device under test. For further information on the capabilities of the software and the PC requirements, please refer to the Konica Minolta Light Meter Brochure.

Specifications & Ordering Information

Model	CS-100A
Sensor	3 x silicon photodiodes
Spectral Response	CIE Tristimulus CIE x(l), y(l) & z(l)
F₁' (Spectral Mismatch to CIE)	Within 8%
Measuring Angle	1°
Optical System	85mm, f/2.8 lens, SLR viewing system
Flare Factor	< 1.5%
View Angle	9°
Focussing Distance	1014 mm to infinity
Min. Measurement Spot	ø14.4 mm
with 153 close-up lens	ø8.0mm
with 135 close-up lens	ø5.2mm
with 122 close-up lens	ø3.2mm
with 110 close-up lens	ø1.3mm
Response Time	FAST: sampling time 0.1s, display update 0.8 - 1.0s
	SLOW: sampling time 0.4s, display update 1.4 - 1.6s
Measurement Units	candelas per sq. meter (cd/m²) or foot Lamberts (fL) - selectable
Range - FAST	0.001 - 299,990 cd/m²
	0.001 - 87,530 fL
Range - SLOW	0.001 - 49,900 cd/m²
	0.001 - 14,500 fL
Accuracy - Luminance (Y)	± 2% ± 2 digits (Illuminant A)
Accuracy - Chromaticity (xy)	± 0.004 (Illuminant A)
Repeatability - Luminance (Y)	± 0.2% of reading ± 1 digit (Illuminant A)
Repeatability - Chromaticty (xy)	FAST (100 cd/m²or above): ± 0.001 (Illuminant A)
	FAST (48.1-100 cd/m²): ± 0.002 (Illuminant A)
	FAST (below 48.1 cd/m²): below measurement range
	SLOW (25.0 cd/m²or above): ± 0.001 (Illuminant A)
	SLOW (12-24.9 cd/m²): ± 0.002 (Illuminant A)
	SLOW (below 12 cd/m²): below measurement range
Measurement Modes	Luminance, chromaticty, colour difference
External Display	3-digit LCD with additional indications
Viewfinder Display	3-digit LCD (for luminance) with LED backlight
Data Interface	RS-232C (4800 baud)
External Control	Measurement process can be started externally via the data interface
Power	1 x 9V battery
Operating Environment	0 to 40°C, relative humidity < 85% (35°C), non-condensing
Storage Environment	-20 to 55°C, relative humidity < 85% (35°C), non-condensing
Dimensions	79 x 208 x 154mm
Weight (without battery)	890g

Accessories Included
	Lens cap
	Eyepiece cap
	Protective lens filter
	ND eyepiece filter
	Case
	Chromaticity chart
	9V battery
Optional Accessories
	Calibration certificate
	Close-up lens (153)
	Close-up lens (135)
	Close-up lens (122)
	Close-up lens (110)
	Long eye relief eye piece
	Angle view finder
	Interface cable (LS-A12)
	Data management software (CS-S10w) - requires LS-A12
	Spectralon white reflectance standard (SRS-99-020, 8°/D)
	Spectralon white reflectance standard (SRS-99-020, 0°/45°)