User manual HANNA INSTRUMENTS HI 96765

[. . . ] Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc. , Woonsocket, Rhode Island, 02895 , USA. 2 PRELIMINARY EXAMINATION Please examine this product carefully. Make sure that the instrument is not damaged. If any damage occured during shipment, please notify your Dealer. Each HI 96765 Blood Plasma Analyzer is supplied complete with: · Light Blocking Cap · 9V Battery · 4 Tissues for wiping tubes · Instrument quality certificate · Instruction Manual · Rigid carrying case CUVET HOLDER PROTECTION Please remove before use Instrument Tissue for wiping tubes 9V Battery Light blocking cap Note:Save all packing material until you are sure that the instrument works correctly. [. . . ] The photoelectric cell collects the radiation I that is not absorbed by the sample and converts it into an electric current, producing a potential in the mV range. The microprocessor uses this potential to convert the incoming value into the desired measuring unit and to display it on the LCD. The measurement process is carried out in two phases: first the meter is zeroed and then the actual measurement is performed. The cuvette has a very important role because it is an optical element and thus requires particular attention. It is important that both, the measurement and the calibration (zeroing) cuvettes, are optically identical to provide the same measurement conditions. Whenever possible use the same cuvette for both. It is necessary that the surface of the cuvette is clean and not scratched. This to avoid measurement interference due to unwanted reflection and absorption of light. It is recommended not to touch the cuvette walls with hands. Furthermore, in order to maintain the same conditions during the zeroing and the measuring phases, it is necessary to close the cuvette to prevent any contamination. FUNCTIONAL DESCRIPTION INSTRUMENT DESCRIPTION 1) 2) 3) 4) 5) 6) CAL key READ key ON/OFF key Liquid Crystal Display (LCD) Tube alignment indicator Tube holder 6 KEYPAD DESCRIPTION · ON/OFF: to turn the meter on and off. · CAL: to calibrate the meter prior to measurement. OPERATING MODES · Measurement mode: default operation mode, enables both calibration and measurement. 4 3 2 1 5 6 DISPLAY ELEMENTS DESCRIPTION 1) The measuring scheme (lamp, tube, detector), appears during different phases of calibration or reading measurement 2) Error messages and warning 3) The batery icon shows the charging level of the batery 4) The hourglass appears when an interval checking is in progress 5) Four digit main display 6) Four digit secondary display 7 ERRORS AND WARNINGS The instrument shows clear messages when erroneous condition appears. Messages are also displayed when the obtained values are outside expected range. a) on calibration Light High: There is too much light to perform a measurement. Light Low: There is not enough light to perform a measurement. No Light: The instrument cannot adjust the light level. Please check that the tube holder does not contain any debris. b) on sample reading Cal: Calibration was not performed. Follow the instructions of the measurement procedure for calibrating the meter. Under range: A blinking "0. 0" indicates that the sample absorbs less light than the zero reference. 8 Over Range: A flashing value of the maximum concentration indicates an over range condition. c) other errors and warnings Cap error: An excess ambient light is reaching the detector. Please place the light blocking cap and press CAL again. If the light blocking cap is properly installed, and a calibration can not be performed, then contact your dealer or the nearest Hanna Customer Service Center. Cooling lamp: The instrument waits for the lamp to cool down. Battery low: The battery must be replaced soon. Dead battery: This indicates that the battery is dead and must be replaced. Once this indication is displayed, the meter will lock up. Change the battery and restart the meter. 9 GENERAL TIPS FOR AN ACCURATE MEASUREMENT The instructions listed below should be carefully followed during testing to ensure best accuracy. · Color or suspended matter in large amounts may cause interference, therefore these should be removed by treatement with active carbon and by prior filtration. [. . . ] Strong ambient light: use the light blocking cap for calibrating the instrument, and while taking readings. BATTERY MANAGEMENT To save battery, the instrument shuts down after 10 minutes of non-use. If a valid measurement was displayed before auto-shut off, the value is displayed when the instrument is switched on. The blinking "CAL" means that a new calibration has to be performed. One fresh battery lasts for around 750 measurements, depending on the light level. [. . . ]