User manual HANNA INSTRUMENTS PH209R

[. . . ] The pH calibration is made simple through the easy-to-operate front panel knobs for offset and slope adjustment. A front knob is provided for easy manual temperature compensation of the pH reading. pH 209 can also measure ion concentration (ISE) and ORP (Oxidation Reduction Potential) in the mV range. The range selection (pH, mV or °C for temperature compensation) is made simple through the front membrane keyboard. [. . . ] If the meter is OFF, detach the electrode from the meter before immersing the electrode in the storage solution. Reference Filling Hole Reference Filling Hole Sensitive Wire Reference Wire Reference Junction Glass Bulb Plastic Body pH Electrode Reference Wire Sensitive Wire Reference Junction Glass Bulb Glass Body pH Electrode 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. The meter reading at 50°C will then be 4. 06, 6. 98 or 9. 82. Reference Wire Reference Junction Platinum or Gold tip Reference Wire Reference Junction Platinum or Gold tip Glass Body ORP Electrode Plastic Body ORP Electrode PREPARATION Remove the protective cap. This is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer. If the bulb and/or junction is dry, soak the electrode in HI 70300 storage solution for at least one hour. 10 11 For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1") below the fill hole, add HI 7082 3. 5M KCl electrolyte solution for double junction or HI 7071 3. 5M KCl+AgCl electrolyte solution for single junction electrodes. For a faster response, unscrew the fill hole screw during measurements. Follow the Storage Procedure above. CLEANING PROCEDURE General Soak in HI 7061 general cleaning solution for approximately 30 minutes. Removal of films, dirt or deposits on the membrane/junction: - Protein Soak in HI 7073 protein cleaning solution for 15 min. - Inorganic Soak in HI 7074 inorganic cleaning solution for 15 minutes. IMPORTANT: After performing any of the cleaning procedures rinse the electrode thoroughly with distilled water, refill the reference chamber with fresh electrolyte (not necessary for gel-filled electrodes) and soak the electrode in HI 70300 storage solution for at least 1 hour before taking measurements. TROUBLESHOOTING Evaluate your electrode performance based on the following. · Noise (Readings fluctuate up and down) could be due to: ­ Clogged/Dirty Junction: Refer to the Cleaning Procedure above. ­ Loss of shielding due to low electrolyte level (in refillable electrodes only): refill with fresh HI 7071 for single junction or HI 7082 for double junction electrodes. · Dry Membrane/Junction: soak in HI 70300 storage solution for at least 1 hour. 50-60°C) Hanna HI 7082 solution for one hour and rinse the tip with distilled water. Refill with fresh HI 7071 for single junction electrodes and HI 7082 for double junction electrodes (refillable electrodes only). · No Slope: check the electrode for cracks in glass stem or bulb and replace the electrode. · Slow Response/Excessive Drift: soak the tip in HI 7061 solution for 30 minutes, rinse thoroughly in distilled water and then follow the Cleaning Procedure above. 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. If constantly used at high temperatures, the electrode life is drastically reduced. Typical Electrode Life Ambient Temperature 1- 3 years 90 °C Less than 4 months 120°C Less than 1 month High concentrations of sodium ions interfere with readings in alkaline solutions; the pH at which the interference starts to be significant depends upon the composition of the glass. This interference is the alkaline error and causes the pH to be underestimated. Alkaline Error Sodium Ion Correction for the Glass at 20-25°C Concentration pH Error -1 + 13. 00 0. 10 0. 1 Mol L Na 13. 50 0. 14 14. 00 0. 20 12. 50 0. 10 13. 00 0. 18 1. 0 Mol L-1 Na+ 13. 50 0. 29 14. 00 0. 40 ACCESSORIES pH CALIBRATION SOLUTIONS HI 70004P pH 4. 01 buffer solution, 20 mL sachet, 25 pcs HI 70007P pH 7. 01 buffer solution, 20 mL sachet, 25 pcs HI 70010P pH 10. 01 buffer solution, 20 mL sachet, 25 pcs HI 7004L pH 4. 01 buffer solution, 500 mL HI 7006L pH 6. 86 buffer solution, 500 mL HI 7007L pH 7. 01 buffer solution, 500 mL HI 7009L pH 9. 18 buffer solution, 500 mL HI 7010L pH 10. 01 buffer solution, 500 mL HI 8004L pH 4. 01 buffer solution in FDA bottle, 500 mL HI 8006L pH 6. 86 buffer solution in FDA bottle, 500 mL HI 8007L pH 7. 01 buffer solution in FDA bottle, 500 mL HI 8009L pH 9. 18 buffer solution in FDA bottle, 500 mL HI 8010L pH 10. 01 buffer solution in FDA bottle, 500 mL ELECTRODE STORAGE SOLUTION HI 70300L Storage solution, 500 mL HI 80300L Storage solution in FDA bottle, 500 mL ELECTRODE CLEANING SOLUTIONS HI 70000P Electrode rinsing solution, 20 mL sachet, 25 pcs HI 7061L General cleaning solution, 500 mL HI 7073L Protein cleaning solution, 500 mL HI 7074L Inorganic cleaning solution, 500 mL HI 7077L Oil & Fat cleaning solution, 500 mL HI 8061L General cleaning solution in FDA bottle, 500 mL HI 8073L Protein cleaning solution in FDA bottle, 500 mL HI 8077L Oil & Fat Cleaning solution in FDA bottle, 500 mL ELECTROLYTE SOLUTIONS HI 7071 3. 5M KCl + AgCl electrolyte solution, 4 x 30 mL, for single junction electrodes HI 7072 1M KNO3 electrolyte solution, 4 x 30 mL HI 7082 3. 5M KCl electrolyte solution, 4 x 30 mL, for double junction electrodes HI 8071 3. 5M KCl + AgCl electrolyte solution in FDA bottle, 4 x 30 mL, for single junction electrodes HI 8072 1M KNO3 electrolyte solution in FDA bottle, 4 x 30 mL HI 8082 3. 5M KCl electrolyte solution in FDA bottle, 4 x 30 mL, for double junction electrodes 15 14 ORP PRETREATMENT SOLUTIONS HI 7091L Reducing pretreatment solution, 500 mL HI 7092L Oxidizing pretreatment solution, 500 mL pH ELECTRODES All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3. 3') cable. HI 1330B Glass body, semimicro, single junction, refillable, combination pH electrode. [. . . ] Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipment, requiring the operator to take all necessary steps to correct interferences. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. During calibration of instruments, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharge. To maintain the EMC performance of this equipment, the recommended cables noted in the user's manual must be used. [. . . ]