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    高精度數(shù)字式旋光儀介紹  a background of experience hp stands for high precision versatile and easy to operate since 1959, the name of dr. kernchen has been closely connected with progress in development and design of automatic polarimeters. our instruments are used worldwide in more than 55 countries and have earned a good reputation due to their excellent performance and reliability. gyromat-hp combines advanced microprocessor technology and highest optomechanical precision opening new dimensions in polarimetry.   
    高精度數(shù)字式旋光儀特點

hp stands for high precision high precision means not only a high resolution of 0.001° optical rotation. it also means a very good linearity of <0.003° over the entire range of measurement. thus, the gyromai-hp guarantees excellent absolute accuracy. displayed results are averages of multiple measurements. the sampling rate is 8/s and by se-lecting a proper integration time within the range of 1-99 s,even samples of lowest light transmittance down to 0.1 % (od 3) can be measured accuray. moreover, microbore cells for sample volumes of less than 1 ml can be used without problems. versatile and easy to operate a well designed water-proof keyboard and a 40-column alphanumeric display are provided for communication between operator and instrument. all instrument functions are displayed as easily understandable menu items: - range se-lection. - se-lection of light source, wavelength (multiple light source/ wavelength models only). - parameter input, such as cell length, specific rotation or standard concentration. - integration time se-lection to define the number of measurements averaged. - sample identification mode se-lection, either for individually entered or automatically advanced sample numbers. - setting of calendar date and time.   
   技術指標

seven measuring ranges optical rotation specific rotation concentration... -by measuring optical rotation,while specific rotation and cell態(tài)萬方length are entered manually. -after calibration by a standard. -sucrose -glucose -°z international sugar scale,icumsa 1988. a choice of light sources and wavelengths eight models of gyromat-hp are offered to meet individual requirements ranging from a budget priced single light source single wavelength polarimeter up to the most versatile model with three lamps (sodium, mercury,tungsten-halogen) and six wavelengths. digital display of temperature the optical rotation of all substances is influenced by temperature. sample cells with builtin pt-100 platinum resistance thermometer permit sample temperature measurements to 0.1 °c accuracy. two data output ports a centronics type parallel printer interface port allows data recording by any low cost standard printer. the second data output port is an rs-232c serial interface for communication with a computer.data transmitted to printer or computer are sample identification number, measured value,sample temperature (optional), date and time of measurement,and measuring range label.