User manual HANNA INSTRUMENTS HI 9524

[. . . ] Instruction Manual HI 9524 Portable Waterproof pH Meter http://www. hannainst. com These Instruments are in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna Product. Please read this instruction manual carefully before using the instrument. It will provide you with the necessary information for a correct use of the instrument, as well as a precise idea of its versatility. These instruments are in compliance with the TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] If the reading is close to the selected buffer, the slope and the offset are calibrated. The values will be stored in memory and the meter will return to the operating mode. Note: The meter will automatically skip the buffer that was used for the first calibration to avoid erroneous calibration. At least 1 full pH unit is required between the two buffers used for the offset and slope calibration. As a result, once calibrated at either pH 6. 86 or 7. 01, the microprocessor will automatically ignore the other one for the second point calibration and it will do likewise for pH 9. 18 and 10. 01 Note: During calibration, the secondary LCD displays the selected buffer value. BUF 10 p H VALUES AT VARIOUS TEMPERATURES Temperature has an effect on pH. The calibration buffer solutions are effected by temperature changes to a lesser degree than normal solutions. For manual temperature calibration please refer to the following chart. For instance, if the buffer temperature is 25°C, the display should show pH 4. 01, 7. 01 or 10. 01 at pH 4, 7 or 10 buffers, respectively. At 20°C, the display should show pH 4. 00, 7. 03 or 10. 06. The meter reading at 50°C will then be 4. 06, 6. 98 or 9. 82. TEMP °C °F 0 32 5 41 10 50 15 59 20 68 25 77 30 86 35 95 40 104 45 113 50 122 55 131 60 140 65 149 70 158 4. 01 4. 01 4. 00 4. 00 4. 00 4. 00 4. 01 4. 02 4. 03 4. 04 4. 05 4. 06 4. 07 4. 09 4. 11 4. 12 6. 86 6. 98 6. 95 6. 92 6. 90 6. 88 6. 86 6. 85 6. 84 6. 84 6. 83 6. 83 6. 84 6. 84 6. 85 6. 85 pH VALUES 7. 01 9. 18 7. 13 9. 46 7. 10 9. 39 7. 07 9. 33 7. 04 9. 27 7. 03 9. 22 7. 01 9. 18 7. 00 9. 14 6. 99 9. 10 6. 98 9. 07 6. 98 9. 04 6. 98 9. 01 6. 98 8. 99 6. 98 8. 97 6. 99 8. 95 6. 99 8. 93 10. 01 10. 32 10. 24 10. 18 10. 12 10. 06 10. 01 9. 96 9. 92 9. 88 9. 85 9. 82 9. 79 9. 77 9. 76 9. 75 11 TROUBLESHOOTING GUIDE Symptoms Problem Solution The meter is slow in re- The electrode is not work- Leave the electrode in a storsponding or gives faulty ing or the reference age solution after cleaning readings the junction. 13 For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1") below the fill hole, add HI 7082 or HI 8082 3. 5M KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 3. 5M KCl+AgCl Electrolyte Solution for single junction electrodes. For a faster response, unscrew the fill hole screw during measurements. For AmpHel®electrodes: If the electrode does not respond to pH changes, the battery is run down and the electrode should be replaced. MEASUREMENT Rinse the electrode tip with distilled water. Immerse the tip (bottom 4 cm /1½") in the sample and stir gently for a few seconds. For a faster response and to avoid cross contamination of the samples, rinse the electrode tip with a few drops of the solution to be tested, before taking measurements. STORAGE To minimize clogging and assure a quick response time, the glass bulb and the junction should be kept moist and not allowed to dry out. Replace the solution in the protective cap with a few drops of HI 70300 or HI 80300 Storage Solution or, in its absence, Filling Solution (HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes). Follow the Preparation Procedure above before taking measurements. Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER. PERIODIC MAINTENANCE Inspect the electrode and the cable. The cable used for connection to the meter must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. For refillable electrodes: Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes). [. . . ] The electrodes and the probes are guaranteed for a period of six months. This warranty is limited to repair or replacement free of charge. Damage due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. [. . . ]