User manual HANNA INSTRUMENTS PH 209

[. . . ] 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. The large LCD is provided with arrows that quickly and clearly indicate the selected range. [. . . ] 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 or HI 80300 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 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 single junction or HI 7082 or HI 8082 for double junction electrodes). Follow the Storage Procedure above. CLEANING PROCEDURE Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately ½ hour. Removal of films, dirt or deposits on the membrane/junction: Soak in Hanna HI 7073 or HI 8073 Protein Cleaning - Protein Solution for 15 minutes. - Inorganic Soak in Hanna HI 7074 or HI 8074 Inorganic Cleaning Solution for 15 minutes. - Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution. 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 or HI 80300 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 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes. · Dry Membrane/Junction: Soak in HI 70300 or HI 80300 Storage Solution for at least 1 hour. 50-60 C) Hanna HI 7082 or HI 8082 Solutions for one hour and rinse the tip with distilled water. Refill with fresh HI 7071 or HI 8071 for single junction electrodes and HI 7082 or HI 8082 for double junction electrodes (refillable electrodes only). 2x109 -10 1x109 -10 -10 2x108 1x108 -10 2x107 -10 1x107 -10 -20 -10 -20 -20 ACCESSORIES pH CALIBRATION SOLUTIONS HI 70004P pH 4. 01 Buffer Sachets, 20mL, 25 pcs HI 70007P pH 7. 01 Buffer Sachets, 20mL, 25 pcs HI 70010P pH 10. 01 Buffer Sachets, 20mL, 25 pcs HI 7004L pH 4. 01 Buffer Solution, 460 mL HI 7006L pH 6. 86 Buffer Solution, 460 mL HI 7007L pH 7. 01 Buffer Solution, 460 mL HI 7009L pH 9. 18 Buffer Solution, 460 mL HI 7010L pH 10. 01 Buffer Sol. , 460 mL HI 8004L pH 4. 01 Buffer Solution in FDA approved bottle, 460 mL HI 8006L pH 6. 86 Buffer Solution in FDA approved bottle, 460 mL HI 8007L pH 7. 01 Buffer Solution in FDA approved bottle, 460 mL HI 8009L pH 9. 18 Buffer Solution in FDA approved bottle, 460 mL HI 8010L pH 10. 01 Buffer Solution in FDA approved bottle, 460 mL ELECTRODE STORAGE SOLUTIONS HI 70300L Storage Solution, 460 mL HI 80300L Storage Solution in FDA approved bottle, 460 mL ELECTRODE CLEANING SOLUTIONS HI 70000P Electrode Cleaning Sachets, 20 mL, 25 pcs HI 7061L General Cleaning Sol. , 460 mL HI 7073L Protein Cleaning Sol. , 460mL HI 7074L Inorganic Cleaning Sol. , 460mL HI 7077L Oil & Fat Cleaning Sol. , 460 mL HI 8061L General Cleaning Solution in FDA approved bottle, 460 mL HI 8073L Protein Cleaning Solution in FDA approved bottle, 230 mL HI 8077L Oil & Fat Cleaning Solution in FDA approved bottle, 460mL REFILL ELECTROLYTE SOLUTIONS HI 7071 3. 5M KCl + AgCl Electrolyte, 4x50mL, for single junction electrodes HI 7072 1M KNO3 Electrolyte, 4x50 mL HI 7082 3. 5M KCl Electrolyte, 4x50 mL, for double junction electrodes HI 8071 3. 5M KCl + AgCl Electrolyte in FDA approved bottle, 4x50mL, for single junction electrodes HI 8072 1M KNO3 Electrolyte in FDA approved bottle, 4x50 mL HI 8082 3. 5M KCl Electrolyte in FDA approved bottle, 4x50 mL, for double junction electrodes 15 0 0 +10 +20+30+40 +50 +60 +70 +80 +90 ° CC +10+20 +30+40 +50+60+70 +80+90 Since the resistance of the pH electrode is in the range of 200 Mohm, the current across the membrane is in the pico Ampere range. Large currents can disturb the calibration of the electrode for many hours. For these reasons high humidity environments, short circuits and static discharges are detrimental to a stable pH reading. 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 14 ORP PRETREATMENT SOLUTIONS HI 7091L Reducing Pretreatment Solution, 460 mL HI 7092L Oxidizing Pretreatment Solution, 460 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. Use: laboratory, vials. 5mm DIA 0. 2" 5mm 0. 2" HI 1330 120 mm 4. 7" "S" VERSION HI 1043B Glass-body, double junction, refillable, combination pH electrode. [. . . ] 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. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. [. . . ]