User manual HANNA INSTRUMENTS PH 210

[. . . ] HANNA LITERATURE Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently covers areas such as: Instruction Manual · Water Treatment · Process · Swimming Pools · Agriculture · Food · Laboratory · Thermometry and many others. New reference material is constantly being added to the library. For these and other catalogs, handbooks and leaflets, contact your dealer or the Hanna Customer Service Center nearest to you. [. . . ] For these reasons high humidity environments, short circuits and static discharges are detrimental to a stable pH reading. The pH electrode's life also depends on the temperature. If constantly used at high temperatures, the electrode life is drastically reduced. Typical Electrode Life Ambient Temperature 90 °C 1- 3 years Less than 4 months PREPARATION Pour small quantities of the buffer solutions into clean beakers. If possible use plastic beakers to minimize any EMC interferences. For accurate calibration and to minimize cross contamination, use two HI 70 04 HI 7004 HI 7007 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. Hanna's glass formulations have the indicated characteristics. Alkaline Error Sodium Ion Correction for the Glass at 20-25°C Concentration pH Error 13. 00 0. 10 0. 1 Mol L-1 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 22 beakers for each buffer solution. One for RINSE CALIBRATION rinsing the electrode and the second for calibration. HI 7007 HI 7007 If you are measuring in the acid range, use pH 4. 01 as second buffer; if you are measuring in the alkaline range, use pH 10. 01 or pH 9. 18 as second buffer. PROCEDURE Calibration has a choice of 5 memorized buffers: pH 4. 01, 6. 86, 7. 01, 9. 18 and 10. 01. It is always recommended to perform a two-point calibration. The pH meters however also provide for one-point calibration, as described below. 11 One-point calibration · Immerse the pH electrode and the temperature probe approximately 4 cm (1½") into a buffer solution of your choice (pH 4. 01, 6. 86, 7. 01, 9. 18 or 10. 01) and stir gently. The temperature probe should be close to the pH electrode. 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: - Protein Soak in Hanna HI 7073 or HI 8073 Protein Cleaning 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. · Drifting: Soak the electrode tip in warm (approx. [. . . ] Data can be further elaborated with graphics, statistical analysis, etc. using the most diffused spread sheet programs (e. g. To install HI 92000 you need a 3. 5" drive and a few minutes to follow the instructions printed on the disk label. To connect your meter to the PC use the optional Hanna HI 920010 cable connector. [. . . ]