User manual HANNA INSTRUMENTS HI 8820

[. . . ] TEMPERATURE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 TEMPERATURE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 DETERMINATION OF THE TEMPERATURE COEFFICIENT OF A SOLUTION (FOR HI8820 ONLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 PROBE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Rinse the probe thoroughly in distilled water. This is to minimize contamination of the calibration solution and secure higher accuracy. When possible, use plastic beakers to minimize any EMC interferences. 703 0 PROCEDURE FOR HI8819: · Pour a small quantity of the conductivity solution into a plastic beaker e. g. HI7030 or HI8030 (12. 88 mS/cm @ 25°C). · Immerse the conductivity probe in the solution submerging the holes of the sleeve (0. 5cm below). Make sure that no air bubbles are trapped inside the glass sleeve. Wait for 2 or 3 minutes for the thermal equilibrium. · Use a CHECKTEMP or a glass thermometer with resolution of 1° for measuring the temperature of the solution (e. g. · Switch the instrument on by pressing the ON/ OFF key. · Press COND/TEMP key to display temperature settings. · Adjust the TEMPERATURE knob to display "25°C" if you are using 25°C (77°F) as reference temperature. °C TEMPERATURE 8 HI · Press the COND/TEMP key to display conductivity readings and select the appropriate conductivity range e. g. "19. 99 mS" for HI7030/HI8030, "99. 9 mS" for HI7034/HI8034, "1999µS" for HI7031/HI8031, "199. 9 µS" for HI7033/HI8033. · Using a small screwdriver adjust the trimmer on the rear panel until the display shows the conductivity reading at the temperature of the solution noted earlier (see the mS conductivity vs. "11. 19 mS". CONDUCTIVITY ELECTRODE CAL DC POWER 12V to 20V + Calibration is now completed and the instrument is ready for use. TO CHECK THE CALIBRATION · Press the COND/TEMP key to display the temperature. · Adjust the TEMPERATURE knob to display the temperature of the calibration solution, i. e. the temperature noted with the CHECKTEMP or glass thermometer. TEMPERATURE 9 · Press the COND/TEMP key to display conductivity. · The display should read the conductivity of the calibrating solution at the reference temperature. using HI7030/HI8030 with a solution at 18°C, the reading will be "12. 88 mS". PROCEDURE FOR HI8820: · Pour a small quantity of the conductivity solution into a plastic beaker. · Immerse the conductivity probe in the solution submerging the holes of the sleeve (0. 5 cm below). Make sure that no air bubbles are trapped inside the glass sleeve. Wait for 2 or 3 minutes for thermal equilibrium. · Switch the instrument on by pressing the ON/OFF key. [. . . ] Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. 18 CE DECLARATION OF CONFORMITY Recommendations for Users Before using these products, make sure that they are entirely suitable for the environment in which they are used. Operation of these instruments in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. The metal band at the end of the sensor is sensitive to electrostatic discharges. Avoid touching this metal band at all times. [. . . ]