User manual HANNA INSTRUMENTS HI 4522

[. . . ] (03) 9769. 0666 · Fax (03) 9769. 0699 Instruction Manual China: Tel. (10) 88570068 · Fax (10) 88570060 HI 4521 & HI 4522 pH/mV/ISE/Temperature/ Conductivity/Resistivity/TDS/Salinity Bench Meters Egypt: Tel. 66. 2619. 0708 · Fax 66. 2619. 0061 MAN4521 10/06 United Kingdom: Tel. (401) 765. 7500 · Fax (401) 765. 7575 For e-mail contacts and a complete list of Sales and Technical offices, please see www. hannainst. com. [. . . ] Multi Point Calibration · Up to 4 calibration points can be performed in order to increase the measurement accuracy on the wide range; · Select the multi point calibration (see Conductivity Setup -> Calibration); · Repeat the steps from the single point calibration for each calibration point. The meter will calculate a cell constant corresponding to each calibration point; · Press to exit calibration mode. is · Press to confirm your selection or press cancel operation. Note: For each range the corresponding cell constant will be displayed. CELL CONSTANT CALIBRATION (edited by the user) · A known value of the probe cell constant can be set by the user for the whole range (see Conductivity Setup -> Cell Constant section) Note: When the user cell constant is used the old calibration (in solution) will be cleared. Log This option allows the user to edit the logging settings: Logging Type, Logging Data Configuration, Sampling Period and New Lot. Logging Type Three logging types are available: Automatic, Manual and AutoHold. With the Automatic type the values are logged automatically at constant time intervals while with the Manual type the user has the capability to log a measured value by pressing . With the AutoHold type the stored values are only the ones frozen on the LCD 31 86 after the logging session was started. or or to highlight the to highlight the to and use · Press Logging Type option. and use · Press desired option. CONDUCTIVITY CALIBRATION It is recommended to calibrate the instrument frequently, especially if high accuracy is required. The conductivity range should be recalibrated: · Whenever the conductivity probe is replaced. · When calibration reminder is activated ("Conductivity Cal Expired"). Note: TDS and Resistivity readings are automatically derived from the conductivity readings and no specific calibration is needed. · Press to confirm your selection or press cancel operation. Logging Data Configuration This option allows the user to select the parameters that accompany a logged value: Date / Time, Calibration Data, Sample ID, Instrument ID, Operator ID, Company Name, Aditional Info 1 and Aditional Info 2. · Use · Press and use or Logging Data Configuration option. · Press to highlight the to highlight the or OFFSET CALIBRATION The meter allows the user to calibrate the probe for the offset. · Set the meter for conductivity range; · Select the automatic standard recognition (see Conductivity Setup -> Calibration); · Leave the dry probe in the air; ; · Enter in calibration mode by pressing · Wait to stabilize. The 0. 000 µS calibration point will appear on the screen; · Press to finish the probe offset calibration. · Press to exit calibration mode or continue calibration in the other standard solutions. Note: The offset calibration can be performed only if it is perfomed first (no other calibration points present). CELL CONSTANT CALIBRATION (in solution) Single Point Calibration · Select the single point calibration (see Conductivity Setup -> Calibration); · Pour a small quantity of the standard solution into a clean beaker. · For accurate calibration and to minimize cross-contamination, use two beakers for each standard solution. One for rinsing the probe and one for calibration. to confirm your selection and use to enable the parameter by selecting Yes or to disable it by selecting No. to 32 85 Clear Calibration Accessing this option, the existent salinity calibration (Percent Scale) can be cleared. To clear calibration: · Use · Press · Press or to highlight the Clear Calibration option. to confirm or press Sampling Period This option allows the user to select the desired sampling period for automatic logging type. or or to highlight the to select the to Salinity Scale The meter uses three salinity scales: Natural Sea Water 1966, Practical Scale 1978, Percent Scale [%]. [. . . ] Note: Press at any time to stop the measurement and return to ISE Measure mode. ANALYTE ADDITION To measure the concentration of a sample using the Analyte Addition incremental method: · Press and then to select ISE Measure mode. · Select the Analyte Addition method (see ISE Setup for details). The first step of the method will be displayed on the LCD in which the user is notified to add the appropriate ISA Buffer Volume (if different from 0 mL) to the standard and to immerse the electrode into the Standard Volume of set concentration. [. . . ]