User manual HANNA INSTRUMENTS HI 981401N

[. . . ] This instrument is in compliance with the FUNCTIONAL DESCRIPTION Range Resolution SPECIFICATIONS 0. 0 to 14. 0 pH 0. 1 pH ±0. 2 pH ±0. 1 pH Manual with two trimmers for offset and slope HI 1286 pH electrode (included) and HI 1283 grounding probe (fixed) IP54 12 Vdc adapter (included) 86 x 110 x 43 mm (3. 4 x 4. 3 x 1. 7'') 150 g (5. 3 oz) Accuracy (@ 25°C/77°F) Typical EMC Deviation Calibration Probes Casing Power Supply Dimensions Weight PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully. If any damage has occurred during shipment, immediately notify your Dealer or the nearest Hanna Customer Service Center. The meter is supplied with: · HI 1286 pH electrode · HI 1283 grounding probe · pH 4. 01 and 7. 01 buffer solutions (20 mL each) · Calibration screwdriver · 12 Vdc power adapter and instructions Note: Conserve all packing material until the instrument has been observed to function correctly. [. . . ] The meter is also supplied with a stainless steel probe to prevent potential grounding problems and thus ensuring longer life for your electrode. The electrode has been designed for use in fertilizer solutions with high concentration of phosphate and nitrate. You can simply hang the meter right above the sample to be tested for continuous measurement, and it will run without interruption on 12 Vdc power supply. Measurements are highly accurate and the meter can be calibrated at one or two points. In order to protect the meter against vapors and humidity, the BNC connector is protected with a waterproof sheath. · Slide the protective sheath down, connect the HI 1286 pH electrode to the BNC connector and then slide the protective sheath back up. Since the protective sheath is rubberized, to ensure maximum waterproof protection, make sure the connector is completely covered. Molded eye "pH 4" calibration trimmer BNC connector HI 1283 stainless steel grounding probe HI 1286 pH electrode 12 Vdc power adapter Power supply connector Protective sheath "pH 7" calibration trimmer Liquid Crystal Display (LCD) Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. · Do not be alarmed if white crystals appear around the electrode protective cap. This is normal with pH electrodes and they dissolve when rinsed with water. · When not in use, rinse the electrode with water and store it with a few drops of storage (HI 70300) or pH7 (HI 7007) solution in the protective cap. Always replace the protective cap after use. · If the electrode has been left dry, soak the tip in a storage (HI 70300) or pH7 (HI 7007) solution for at least one hour to reactivate it. · To minimize clogging and provide longer life for the pH electrode, it is recommended to clean it monthly. Immerse the tip of the electrode in HI 7061 for one hour, then rinse it with tap water. CALIBRATION For the greatest accuracy, frequent calibration of the instrument is recommended. In addition, the instrument must be recalibrated whenever: a) The pH electrode is replaced b) After testing aggressive chemicals c) Extreme accuracy is required d) At least once a month · With the supplied screwdriver, adjust the "pH 7" calibration trimmer until the display shows "7. 0" pH. CE DECLARATION OF CONFORMITY PREPARATION Pour small quantities of pH 7. 01 (HI 7007) and pH 4. 01 (HI 7004) solution into two clean beakers. For accurate calibration use two beakers for each buffer solution, the first one for rinsing the tip of the electrode and the second one for calibration. RINSE CALIBRATION · Rinse and immerse pH electrode and grounding probe in pH 4. 01 (or pH 10. 01) buffer solution. · Stir gently, wait a couple of minutes and adjust the "pH 4" trimmer until the LCD shows "4. 0" pH (or "10. 0" pH). TAKING pH MEASUREMENTS · Turn the meter on by connecting the 12 Vdc power adapter to the meter and to the mains. · In addition, the meter is supplied with a differential input and HI 1283 stainless steel probe to prevent potential grounding problems. [. . . ] The glass bulb at the end of the electrode is sensitive to electrostatic discharges. During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. [. . . ]