User manual HANNA INSTRUMENTS HI 98280

[. . . ] Instruction Manual HI 9828 Multiparameter Meter with GPS w w w. h a n n a i n s t . c o m 1 Dear Customer, Thank you for choosing a HANNA instruments® product. Please read this instruction manual carefully before using the instrument. It will provide you with the necessary information for correct use of the instrument, as well as a precise idea of its versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com or see the back cover for our worldwide contact list. [. . . ] The conductivity calibration menu includes 3 different types of calibration: Conductivity, Actual conductivity and Salinity. The "Conductivity" option allows a single point calibration with a standard solution selectable by the user. The "Actual conductivity" option allows a single point calibration with a custom conductivity solution of known actual value (not temperature compensated). The "Salinity" option allows calibration with a standard salinity solution. 35 The 3 options are correlated, so that each of the procedures will calibrate all the 3 ranges. Note For correct EC readings, calibration should be performed using a standard solution with a conductivity value close to the sample to be measured. After choosing the "Conductivity calibration" mode from the "Calibration" menu, select the calibration type with the arrow keys and then press <OK>. Conductivity · Select the "Conductivity" option and press <OK> to confirm. · Fill a beaker with a standard conductivity solution (see "Accessories" section for choosing the proper HANNA solution). · Immerse the probe in the solution and wait for stable reading. · The main display shows the actual reading, while the secondary level displays the standard value. Actual Conductivity · Select the "Actual conductivity" option and press <OK> to confirm. · Immerse the probe in the conductivity solution and wait for stable reading. · When the reading is stable, press <Confirm> to store the calibration data. · After confirmation, the following messages are displayed: "Storing data on probe, please wait. . . ", "Updating GLP data, please wait. . . " and "Calibration completed". · Press <OK> to return to the "Calibration" menu. Salinity · Select the "Salinity" option and press <OK>. · Insert the salinity value of the custom calibration solution. · Immerse the probe in the solution and wait for stable reading. · When the reading is stable, press <Confirm> to store the calibration data. · After confirmation, the following messages are displayed: "Storing data on probe, please wait. . . ", "Updating GLP data, please wait. . . " and "Calibration completed". · Press <OK> to return to the "Calibration" menu. To calibrate the offset, set the calibration point at 0 S/cm and repeat the procedure. If the temperature input is not within the acceptable range (0 to 50°C), the message "Invalid temperature" is displayed. If the conductivity input is not within the acceptable range, the message "Invalid input" is displayed. · To change the standard value, press <Cal. [. . . ] · If the bulb and/or junction are dry, soak the electrode in HI70300 storage solution for at least one hour. · To minimize clogging and ensure a quick response time, the glass bulb and the junction should be kept always moist and not allowed to dry. · Store the electrode with a few drops of HI70300 storage solution in the protective cap. NEVER USE DISTILLED OR DEIONIZED WATER TO STORE THE pH ELECTRODE. 58 59 · Inspect the electrode for scratches or cracks. [. . . ]