User manual HANNA INSTRUMENTS HI 981404N

[. . . ] The probes are warranted for a period of six months. This warranty is limited to repair or replacement free of charge. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. [. . . ] 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. 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. To avoid electrical shock, do not use this instrument when voltage at the measurement surface exceeds 24 Vac or 60 Vdc. To avoid damage or burns, do not perform any measurement in microwave ovens. OPERATIONAL GUIDE pH ELECTRODE CONNECTION 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. For 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. · To minimize clogging and provide longer life for the pH electrode, it is recommended to clean it at least once a month. Immerse the tip of the electrode in HI 7061 cleaning solution for half an hour and then rinse it with tap water. · Wait a couple of minutes and then adjust the "pH 4" trimmer until the LCD shows "pH 4. 0" (or "pH 10. 0"). The pH calibration is now complete. ACCESSORIES HI 1286 HI 1283* HI 7632* HI 7634* HI 70004P HI 70007P HI 70010P HI 7004M HI 7007M HI 7010M HI 7004L HI 7007L HI 7010L HI 70031P HI 70442P HI 7031M HI 70442M HI 7031L HI 70442L HI 70300M HI 70300L HI 7061M HI 7061L HI 710005 HI 710006 HI 710012 HI 710013 HI 710014 Double junction, plastic body pH electrode with 2 m (6. 6') cable and BNC connector Stainless steel grounding probe with 2 m (6. 6') cable Conductivity probe with 2 m (6. 6') cable for HI 981405N Conductivity probe with 2 m (6. 6') cable for HI 981404N pH 4. 01 buffer, 20 mL sachet, 25 pcs pH 7. 01 buffer, 20 mL sachet, 25 pcs pH 10. 01 buffer, 20 mL sachet, 25 pcs pH 4. 01 buffer solution, 230 mL bottle pH 7. 01 buffer solution, 230 mL bottle pH 10. 01 buffer solution, 230 mL bottle pH 4. 01 buffer solution, 500 mL bottle pH 7. 01 buffer solution, 500 mL bottle pH 10. 01 buffer solution, 500 mL bottle 1. 41 mS/cm solution, 20 mL sachet, 25 pcs 1500 ppm solution, 20 mL sachet, 25 pcs 1. 41 mS/cm standard solution, 230 mL bottle 1500 ppm standard solution, 230 mL bottle 1. 41 mS/cm standard solution, 500 mL bottle 1500 ppm standard solution, 500 mL bottle Storage solution, 230 mL bottle Storage solution, 500 mL bottle Cleaning solution, 230 mL bottle Cleaning solution, 500 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 CONDUCTIVITY CALIBRATION · Turn the meter on. · Pour a small quantity of the proper calibration solution in a beaker (HI 7031 for HI 981405N and HI 70442 for HI 981404N). If possible, use plastic beakers to minimize any EMC interference. · Immerse the conductivity probe in the solution, making sure that the metal pins are completely submerged. Note: For best accuracy, the probe body does not touch nor stand close to the side walls of the beaker. · Wait for a couple of minutes for thermal equilibrium to be reached and the temperature to be compensated. · Tap the probe gently on the bottom, then shake it to make sure no air bubbles have remained trapped. [. . . ] · Remove the protective cap, rinse and immerse pH electrode and gorunding probe in pH 7. 0 buffer solution. Stir gently and wait for the reading to stabilize. Note: The pH electrode should be submerged approximately 4 cm (1½") in the solution. · With the calibration screwdriver, adjust the "pH 7" trimmer until the LCD shows "pH 7. 0". [. . . ]