User manual HANNA INSTRUMENTS HI 8820

[. . . ] 12 TEMPERATURE COMPENSATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 DETERMINATION OF THE TEMPERATURE COEFFICIENT OF A SOLUTION (FOR HI8820 ONLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 PROBE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] See page 15 for the procedure to select the correct coefficient value. · Before taking any measurement allow a few minutes for the reading to stabilize. As soon as the thermal equilibrium is reached (3 or 4 minutes) the reading stops drifting. · The conductivity reading displayed has been automatically compensated for temperature variations (after 2 or 3 minutes). · After the measurement is completed, the instrument should be switched off by pressing the ON/OFF key and the probe should be cleaned (see page 15 for cleaning procedure). 0 0. 5 2 1 1. 5 TEMPERATURE COEFFICIENT 7 CALIBRATION INITIAL PREPARATION If you are measuring in the mS ranges, calibrate the meter using HI7030 (or HI8030) conductivity solution (12. 88 mS @ 25°C) or HI7034 (or HI8034) conductivity solution (80 mS @ 25°C). Choose a solution with a conductivity value close to the solution to be measured. For the µS ranges, use HI7031 (or HI8031) conductivity solution (1413 µS @25°C) when calibrating in the range from 0 to 1999 µS or HI7033 (or HI8033) conductivity solution (84 µS @ 25°C) when calibrating in the range from 0 to 199. 9 µS. 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. · Immerse the conductivity probe in the solution submerging the holes of the sleeve (0. 5cm below). · Use a CHECKTEMP or a glass thermometer with resolution of 1° for measuring the temperature of the solution (e. g. · 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. 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). "19. 99 mS" for HI7030/HI8030, "99. 9 mS" for HI7034/HI8034, "1999µS" for HI7031/HI8031, "199. 9 µS" for HI7033/HI8033. 1 1. 5 · Set the temperature coefficient knob to 2%°C. 0. 5 0 2 2. 5 TEMPERATURE COEFFICIENT 10 0 703 HI · Using a small screwdriver adjust the trimmer on the rear panel until the display shows the conductivity reading at 25°C (77°F), e. g. : "12. 88 mS" for HI7030/HI8030, "80. 00 mS" for HI7034/HI8034, "1413 µS" for HI7031/HI8031, "84 µS" for HI7033/HI8033. CONDUCTIVITY ELECTRODE CAL DC POWER 12V to 20V + If you are using a different reference temperature, refer to the conductivity vs temperature charts on page 12 for the appropriate conductivity reading at the reference temperature. If you prefer to standardize the temperature to 20°C (68°F) rather than 25°C (77°F), using HI7030/HI8030, adjust the trimmer to read "11. 67 mS" i. e. 11670 µS (as indicated on the chart on page 12). All subsequent measurements will be compensated to 20° (68°F). [. . . ] To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc. , 584 Park East Drive, Woonsocket, Rhode Island, 02895 , USA. 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. [. . . ]