仪器对比
关注
CHEMUSB4-VIS-NIR分光光度计是一款小型系统，其包括下列组件：高端内置光源，一台USB型光谱仪，适用于1cm试管的支架以及高速电子设备。它能够提供实时的、基于PC技术的光谱测量以及能在25ms内获取370-985范围的全光谱。
产品特点：
· 全集成的预装系统覆盖370-985nm波长范围，光学分辨率为1.0（FWHM）
· 微型系统是实验室和教学的理想选择
· 直接连接有氘钨灯源/紫罗兰色LED光源与样品支架
· 吸光率小至0.01
· 通过USB2.0接口可快速地将光谱仪与计算机相连
Direct-attach Light Source
The CHEMUSB4-VIS-NIR uses the USB-ISS-VIS combination sample holder (1-cm cuvette) and violet LED-boosted tungsten light source for measuring relative absorbance. The light source boosts signal in the blue and provides over 45,000 hours of use.
Programmable Microcontroller
The CHEMUSB4-VIS-NIR uses our USB4000 Spectrometer. The USB4000 features an onboard programmable microcontroller that provides you with considerable flexibility in controlling the spectrometer and accessories. Through a 22-pin connector, you can implement all operating parameters in the software: control light sources, create processes, and retrieve information on external objects. You have access to 8 user-programmable digital Inputs/Outputs for interfacing to other equipment.
Modular Design
Ocean Optics offers complete line of fiber optic sampling accessories and teaching tools to further enhance your CHEMUSB4-VIS-NIR system. Most accessories have SMA 905 connectors for application flexibility; changing the sampling system is as easy as unscrewing a connector and adding new components or accessories.
For even more flexibility, consider the CHEM4-VIS-FIBER. An optical fiber based system, the CHEM4-UV-FIBER lets you quickly and easily couple fiber optic accessories, such as reflection probes or transmission dip probes, to the system's light source.
Plug-and-Play Operation
The CHEMUSB4-VIS-NIR interfaces to a PC, PLC or other embedded controllers via USB 2.0 or RS-232 serial port. When using the serial port, the system requires a single 5-volt power supply (not included). Data unique to each spectrometer is programmed into a memory chip on the USB4000; our spectrometer operating software reads these values for easy setup and hot swapping among PCs.
Serial port operation tips: When using the serial port, the USB4000 requires a single 5-volt power supply (not included). Also, SpectraSuite Spectroscopy Software does not support spectrometer operation via the serial port. However, using the included Serial Port Command Set, you can write your own software that makes serial port operation possible.
Specifications
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Physical
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Spectrometer dimensions:
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89.1 mm x 63.3 mm x 34.4 mm
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Spectrometer weight:
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190 grams
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Light source dimensions:
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40.7 mm x 88.8 mm x 34.1 mm
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Light source weight:
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130 g
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Detector Specifications
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Detector:
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Toshiba TCD1304AP Linear CCD array
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Pixels:
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3648 pixels
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Pixel size:
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8 μm x 200 μm
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Pixel well depth:
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100,000 electrons
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Signal-to-noise ratio:
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300:1 (at full signal)
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A/D resolution:
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16 bit
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Corrected linearity:
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>99.8%
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Sensitivity:
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130 photons/count at 400 nm; 60 photons/count at 600 nm
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Optical Bench
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Design:
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f/4, Asymmetrical crossed Czerny-Turner
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Focal length:
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42 mm input; 68 mm output
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Entrance aperture:
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25 µm wide slit
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Grating:
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Grating #2
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OFLV filter:
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OFLV-350-1000
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Fiber optic connector:
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SMA 905 to 0.22 numerical aperture single-strand optical fiber
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Spectroscopic
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Wavelength range:
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370 to 985 nm
(The actual range typically exceeds what's listed here. The range listed is where you will see changes as small as 0.01 absorbance units.) |
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Optical resolution:
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1.0 nm FWHM
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Signal-to-noise ratio:
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300:1 (at full signal)
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A/D resolution:
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16 bit
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Dark noise:
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50 RMS counts
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Integration time:
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3.8 ms to 10 seconds
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Dynamic range:
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2 x 108 (system), 1300:1 for a single acquisition
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Stray light:
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<0.05% at 600 nm; 0.10% at 435 nm
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Light Source/Sample Holder
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Power consumption:
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160 mA @ 5 VDC; external power supply (included)
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Pathlength:
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1 cm
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Cuvette shape:
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Square
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Light source:
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Tungsten halogen and violet LED
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"Z" dimension:
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15 mm
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Bulb life (hours):
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45,000
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Time to stabilized output:
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~5 minutes
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Electronics
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Power consumption:
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250 mA @ 5 VDC
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Data transfer speed:
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Full scans to memory every 5 ms with USB 2.0 port, 18 ms with USB 1.1 port
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Inputs/Outputs:
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Yes, 8 onboard digital user-programmable GPIOs
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Analog channels:
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No
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Auto nulling:
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Yes
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Breakout box compatible:
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Yes, HR4-BREAKOUT
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Trigger modes:
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4 modes
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Strobe functions:
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Yes
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Connector:
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22-pin connector
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Computer
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Operating systems:
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Windows 98/Me/2000/XP, Mac OS X and Linux with USB port; Any 32-bit Windows OS with serial port
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Computer interfaces:
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USB 2.0 @ 480 Mbps (USB1.1 compatible); RS-232 (2-wire) @ 115.2 K baud
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Peripheral interfaces:
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SPI (3-wire); I2C inter-integrated circuit
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