User manual HANNA INSTRUMENTS HI 9321

[. . . ] Instruction Manual HI 9321 HI 931400 HI 931401 Microprocessor-based Bench pH/mV/°C Meters ins rum pH ns / CFM / CFM CAL pH ca libration Start calibra Select buffer proce dure MEM MR COMM RANG tion Confir m wh 1 value dy Functio n For sto ring dis us sto on play res a ult Select Confir m wh en rea buffer 2 value dy °C en rea Recal l previo For RS pH or HI 93 MIC 1401 pH M ROPROCE ETER SSOR MEM E Sel ect 232 con ORP red dat figurati measu rement ON °C OFF MR °C CAL COMM CFM RANGE www. hannainst. com These Instruments are in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna Product. It is recommended that you read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument, as well as a precise idea of its versatility. If you need more technical information, do not hesitate to e-mail us at tech@hannainst. com. [. . . ] Replace the buffer if tion necessary Defective electrode Replace the electrode Erroneous buffer solution Make sure the buffer setting used for slope calibra- is correct and the solution is tion fresh. Replace the buffer if necessary Defective electrode Replace the electrode Display shows: "WRONG 2 " and "WRONG " BUF The meter does not Out of order temperature Replace the probe work with the tem- probe perature probe The meter fails to cali- Out of order pH elec- Replace the electrode brate or gives faulty trode readings 18 ELECTRODE CONDITIONING & MAINTENANCE PREPARATION Remove the protective cap. DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. 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 or HI 80300 Storage Solution for at least one hour. 19 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). Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above. AmpHel® is a registered Trademark of "Hanna Instruments" 20 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. [. . . ] Use: surface measurement. 12 mm 0. 5" HI 1413 110 mm 4. 3" Half-cell electrodes: HI 2110B Glass-body, single half-cell pH electrode. Use: general purpose. 9. 5mm DIA 0. 37" 12 mm 0. 5" HI 2110 120 mm 4. 7" HI 5311 Glass-body, Ag/AgCl reference half-cell electrode, double junction, refillable with 4mm plug with 1m (3. 3') cable. Use: general purpose with wide temperature range. 12 mm 0. 5" HI 5311 120 mm 4. 7" Kynar® is registered Trademark of "Pennwalt Corp. " 32 HI 5412 Glass-body, single Calomel reference half-cell electrode, refillable with 4mm plug with 1m (3. 3') cable. Use: general purpose with constant temperature range. 12 mm 0. 5" HI 5412 120 mm 4. 7" ORP electrodes: HI 3131B Glass-body, refillable, combination platinum ORP electrode. [. . . ]