User manual HANNA INSTRUMENTS HI 981402

[. . . ] This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. [. . . ] Measurements are highly accurate and the meter can be calibrated at one or two points. You no longer need to worry about battery changes either: the unit runs without interruption on 12 VDC power supply. OPERATIONAL GUIDE pH ELECTRODE CONNECTION & MAINTENANCE 1. Molded eye Alarm LED pH 4. 0 calibration trimmer BNC connector HI 1286 or HI 2114P/2 pH electrode 12 VDC power adapter Power supply connector Protective sheath pH 7. 0 calibration trimmer Liquid Crystal Display In order to protect the instrument against vapors and humidity, the BNC connector is shielded behind a waterproof sheath. · Slide the protective sheath down. Connect the pH electrode to the BNC connector and then slide the protective sheath back up all the way up to the casing. Since the protective sheath is rubberized to ensure maximum waterproof protection, make sure the connector is completely covered. · 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 to minimize contamination and store it with a few drops of storage (HI 70300) or pH 7 (HI 7007) solution in the protective cap. Always replace the protective cap after use. DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES. · If the electrode has been left dry, soak the tip in a storage (HI 70300) or pH 7 (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 and then rinse it with tap water. · With a small screwdriver adjust the setpoint trimmer to display the desired value in the range 3 to 11 pH (HI 981402) or 6 to 9. 5 pH (HI 981403). pH 4. 0 (HI 7004) is recommended for measuring acidic samples. Use pH 10. 0 (HI 7010) if subsequent samples are alkaline. ACCESSORIES HI 1286 HI 2114P/2 HI 70004P HI 70007P HI 7004L HI 7007L HI 7061L HI 710005 HI 710006 HI 710012 HI 710013 HI 710014 HI 77400P Double junction, plastic body pH electrode with 2 m (6. 6') cable and BNC connector Double junction, plastic body pH electrode with 2 m (6. 6') cable and BNC connector pH 4. 01 solution, 20 mL sachet (25 pcs) pH 7. 01 solution, 20 mL sachet (25 pcs) pH 4. 01 solution, 460 mL bottle pH 7. 01 solution, 460 mL bottle Electrode cleaning solution, 460 mL bottle 12 VDC power adapter, US plug 12 VDC power adapter, European plug 12 VDC power adapter, Australian plug 12 VDC power adapter, Southern Africa plug 12 VDC power adapter, UK plug pH 4 & 7 solutions, 20 mL sachet (5 each) CALIBRATION PROCEDURE · Turn the meter on and make sure that the MEASURE/SET switch is on the MEASURE mode. · Make sure the switch is moved back to the right (MEASURE Mode). · Replace the rear panel and the gasket, ensuring the unit is properly closed. · In HI 981402, whenever the pH reading varies by more than ±0. 5 pH from the setpoint, the red alarm LED blinks to warn the user. In HI 981403 the alarm LED starts blinking when the pH reading becomes greater than setpoint and stops blinking only when the reading becomes 0. 5 pH lower than setpoint. [. . . ] This way, contamination of the buffers is minimized. RINSE CALIBRATION 04 70 HI ADJUSTING THE SETPOINT PREPARATION · Wait a couple of minutes and then adjust the left hand trimmer until the LCD shows the value of the second buffer. The pH calibration is now complete. HI 7007 HI 7007 · Move the switch to the left (SET). Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause unacceptable interferences to radio and TV equipment. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. [. . . ]