Specifications

Principal Specifications of the CAS 140D

Model	UV/VIS	UV/VIS/NIR	VIS	VIS/NIR
Spectral range	200 - 830 nm	220 – 1020 / 300 – 1100 nm	360 – 830 nm	380 – 1040 nm
Detector	Back-thinned CCD
Number of pixels	1024 x 128
Spectral resolution¹⁾	3.0 nm	3.7 nm	2.2 nm	3.0 nm
Data point interval	0.65 nm	0.8 nm	0.5 nm	0.65 nm
Wavelength accuracy	± 0.2 nm
Integration time	4 ms – 65 s
Shortest duration SOT to EOT²⁾	6 ms
Sensor dynamic range³⁾	37,000:1
Linearity	± 0.5 %
Cooling	-10 °C
Stray light
Broadband for illuminant A⁴⁾	5·10-4
For LED⁵⁾	1·10-4
With laser⁵⁾	5·10-5
Sensitivity
Irradiance⁶⁾ [W/m² nm]	1·10-8 – 100	6·10-9 – 60	7·10-9 – 70	6·10-9 – 60
Spectrophotometry
Baseline noise⁷⁾	± 0.4 %
Transmission measuring accuracy⁸⁾	± 0.5 % T
Baseline drift⁹⁾	0.15 %/h

Spectrograph
Focal length, grating	Approx. 120 mm f/3.5 / plane ruled grating
Slit	50 µm, 100 µm or 250 µm
Filter wheel / Shutter	Max. 7 slots for density filters OD 0.5 to OD 4; UV/VIS and UV/VIS/NIR with UV density filters; position monitoring with encoder
Electrical data
AD converter	24 bit resolution, Chip 16 bit
PC interface	USB 2.0, PCIe, Ethernet
Triggering	1 TTL input with ascending slope; 2 software-controlled TTL outputs; 1 TTL output with flash pulse
Other
Dimensions (H, W, D)	144 x 341 x 359 mm³
Power supply	Wide-range input 100 – 240 VAC 50/60 Hz
Power consumption	Max. 70 VA
Ambient temperature	15 – 35 °C; relative humidity 0 – 70 % max., non-condensing
Weight	Approx. 9 kg
Valid standards	In conformity with EN 60721-4-7 Class 7M2, EN 60721-4-7 Class 2M2, EN 61326:2004-05 and EN 61010-2002-08

Measure-ment uncertainty ¹⁰⁾	Lumi-nance / radiance	Lum. intensity/ flux	Irradiance / illumi-nance	Color coordinates (x,y) ¹¹⁾	Dominant wave-length
Instrument precision	± 0.1 %			0.0001	0.02 nm
Accuracy	± 3 %	± 4 %	± 3.5 %	0.0015	0.5 nm

^{1) Applies to a 100 µm slit.}

^{2) With USB interface.}

^{3) For a single acquisition with 4 ms integration time.}

^{4) Measured with edge filter OG455 at 400 nm, relative to peak intensity of unweighted spectral data.}

^{5) Measured 150 nm to left of the peak wavelength, relative to peak intensity of unweighted spectral data.}

^{6) Measured with optical probe EOP-120 and OFG-414 fiber bundle at 600 nm and signal/noise ratio of 10:1, without averaging.}

^{7) With shortest integration time, without averaging and with 50 % modulation. This value improves with appropriate averaging (e.g. 9x averaging results in a 3x reduction of noise).}

^{8) Applies to optimum spectral range; with 10 % transmission and immediately after recording an averaged baseline.}

^{9) Typical value. Applies with LS100-130 light source after 2 hour warm-up.}

^{10) Minimum achievable, extended relative measuring uncertainty applied to a twofold standard deviation. Only applies to the measuring and ambient conditions used for calibration (e.g. without density filter, optimum spectral range, sufficient signal level, etc.).}

^{11) For white LEDs.}