Code HI1217-1 HI1291D Description pH electrode pH electrode Reference single, Ag/AgCl single, Ag/AgCl Junction / Flow Rate ceramic, single ceramic, single Electrolyte gel gel Max Pressure 2 bar 2 bar Range pH: 0 to 12 pH: 0 to 12 Recommended Operating Temp. 0 to 70°C (32 to 158°F) 0 to 70°C (32 to 158°F) Glass Type LT (low temperature) LT (low temperature) Tip /Shape spheric (dia: 5.0 mm) spheric (dia: 5.0 mm) Temperature Sensor yes yes Amplifier yes yes Body Material PEI PEI Cable 5 wires; 1 m (3.3’) 5 wires; 1 m (3.3’) Recommended Use general purpose general purpose, education, laboratory Connection HI1217-1 DIN** HI1291D DIN** ** Recommended for use with HI8314-1 pH meter Á12 mm 110 mm 153.5 mm Special pH and ORP Electrodes ** Recommended for use with HI207 and HI208 pH meters Á12 mm 120 mm 163.5 mm Tips for the Most Accurate Measurements Keep Electrode Hydrated Ideally, pHelectrodes should be kept in a storage solution when not in use. Placing the electrode in a small glass lled with storage solution is suitable. An option for pocket meters is to place a small piece of sponge into the meter’s cap and pour storage solution into the cap to wet the sponge. Pouring o any excess solution beforehand, the cap can then be placed on the meter. If a storage solution is not available the next best option is to use pH 4.01 buer (pH 7.01 is also suitable to a lesser extent). Clean Electrodes Before Use Clean the junction of your electrodes once a day or at least once a week to prevent junction clogging and to maintain accuracy. Immerse the electrode in the proper cleaning solution for at least 15 to 20 minutes. Hanna oers a wide range of cleaning solutions for general purpose and specic applications. Replace Electrodes Once a Year If your electrode takes too long to stabilize a reading, or readings °uctuate wildly, it is most likely time to replace the electrode. The typical life span of any pH electrode is from 6 months to 1.5 years. Additional Tips • Calibration and storage solutions should be changed regularly (i.e. monthly). • Calibrate the meter often if a high degree of accuracy is required. • Remember that the calibration is as only as good the buffer being used (i.e. old or contaminated buffer may not have the same value on the label). • Single-use calibration sachets, as opposed to bottles, ensure that your buffer solution is always fresh. • If the meter takes an unusually long time to get a stable reading, the junction may be clogged. • Rinse the probe with purified water after each use. 2 pH 2.149 www.hannainst.com | electrodes
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