User manual HANNA INSTRUMENTS PH 209V

[. . . ] 3 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · Switch the instrument on by pressing the ON/OFF button. · Rinse and immerse the pH electrode in pH 7. 01 buffer and shake briefly. Wait a couple of minutes for the reading to stabilize. · Note the temperature of the buffer solution using the supplied HI 98501 thermometer (e. g. · Press the °C key to select temperature setting, then adjust the Temperature knob until the LCD shows the noted temperature. · Rinse and immerse the pH electrode in pH 3. 00 buffer and shake briefly. · Wait a couple of minutes, then adjust the SLOPE knob until the display shows the pH value at the noted temperature (see the "pH versus temperature" chart at page 10). · The pH calibration is now complete. 4 cm (1½") 8 9 pH VALUES AT VARIOUS TEMPERATURES pH readings are strongly affected by temperature. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. For manual temperature calibration please refer to the following chart. pH ELECTRODE MAINTENANCE Note: To prevent damage to the electrode, remove the pH electrode from the sample before turning the meter off. With the meter OFF, detach the electrode from the meter and immerse it in the storage solution. Preparation Remove the electrode 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 have formed inside the glass bulb. The electrode cannot function properly under these conditions. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer. Sensitive bulb To avoid clogging problems and ensure a fast response, the bulb must be kept moist at any time. Store the electrode with few drops of HI 70300 storage solution in the protective cap. NEVER USE DISTILLED OR DEIONIZED WATER FOR STORING PURPOSES. Periodic maintenance Inspect electrode and cable. The cable used for the connection to the meter must be intact and there must be no points of broken insulation. The connector must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. Refilling the electrode ALWAYS VERIFY THE ELECTROLYTE LEVEL. [. . . ] (03) 3258. 9565 · Fax (03) 3258. 9567 Korea: Tel. (02) 2278. 5147 · Fax (02) 2264. 1729 Malaysia: Tel. (603) 5638. 9940 · Fax (603) 5638. 9829 Singapore: Tel. 6296. 7118 · Fax 6291. 6906 South Africa: Tel. [. . . ]