User manual HANNA INSTRUMENTS EC215

[. . . ] 3 FUNCTIONAL DESCRIPTION EC 214 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPECIFICATIONS EC 214 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 FUNCTIONAL DESCRIPTION EC 215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SPECIFICATIONS EC 215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · Allow a few minutes for the reading to stabilize. The LCD will display the temperature compensated conductivity reading. 8 9 CALIBRATION The instrument should be calibrated at least once a month, or when the probe is changed. INITIAL PREPARATION For better accuracy of measurements it is recommended to use the calibration solution with a conductivity value as close as possible to the sample to be measured. See the "Accessories" section for a complete list of available HANNA calibration solution. Rinse the probe thoroughly in distilled water. If possible, use plastic beakers to minimize any EMC interferences. 703 · Press "COND/°C" to select conductivity reading and select the appropriate range: "199. 9 S" for HI 7033 "1999S" for HI 7031 "19. 99 mS" for HI 7030 "199. 9 mS" for HI 7034 Note: If the display shows "1", there is an over-range condition. · Allow a few minutes for the reading to stabilize, then adjust the "CALIBRATION" knob to read the calibration solution conductivity value at 25°C (77°F), e. g. 12. 88 mS/cm. PROCEDURE FOR EC214 · Pour a small quantity of the appropriate calibration solution, e. g. HI 7030 (12. 88 mS/cm @ 25°C), into a plastic beaker. · Immerse the probe in the solution while completely submerging the holes of the sleeve. Tap the probe lightly on the bottom of the beaker to remove any air bubbles trapped inside the sleeve. Measure the solution temperature with a Checktemp or another accurate thermometer. · Press the "COND/°C" key to select temperature setting. 0 · All subsequent measurements will be referenced to 25°C (77°F). · To reference the measurements to 20°C (68°F), adjust the "CALIBRATION" knob to read the calibration solution conductivity value at 20°C (68°F), e. g. · Calibration is now complete and the instrument is ready for use. HI PROCEDURE FOR EC215 · Pour a small quantity of the appropriate calibration solution, e. g. HI 7030 (12. 88 mS/cm @ 25°C), into a plastic beaker. · Immerse the probe in the solution while completely submerging the holes of the sleeve. Tap the probe lightly on the bottom of the beaker to remove any air bubbles trapped inside the sleeve. · Adjust the "TEMPERATURE COEFFICIENT" knob to 2%/°C. · Adjust the "TEMPERATURE" knob to display the temperature of the solution on the LCD. 10 11 HI 703 0 · Select the appropriate range: "199. 9 S" for HI 7033 "1999S" for HI 7031 "19. 99 mS" for HI 7030 "199. 9 mS" for HI 7034 Note: If the display shows "1", there is an over-range condition. · Allow a few minutes for the reading to stabilize, then adjust the "CALIBRATION" knob to read the calibration solution conductivity value at 25°C (77°F), e. g. 12. 88 mS/cm. CONDUCTIVITY VERSUS TEMPERATURE CHART The conductivity of an aqueous solution is the measure of its ability to carry an electrical current by means of ionic motion. The conductivity invariably increases with increasing temperature. It is affected by the type and number of ions in the solution and by the viscosity of the solution itself. [. . . ] (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 MANEC215R3 South Africa: Tel. [. . . ]