User manual HANNA INSTRUMENTS EC 214

[. . . ] 5 FUNCTIONAL DESCRIPTION EC 215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SPECIFICATIONS EC 215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · Adjust the "TEMPERATURE COEFFICIENT" knob to the temperature coefficient value of the solution (see determination of the temperature coefficient of a solution paragraph). TAKING CONDUCTIVITY MEASUREMENTS WITH EC 214 · switch the instrument on by pressing the ON/OFF key. · Immerse the probe in the solution submerging the holes of the sleeve (0. 5 cm below). Tap the probe lightly on the bottom of the beaker to remove any air bubbles trapped inside the sleeve. Take the temperature of the solution with a CHECKTEMP or a glass thermometer. · Press the "COND/ C" key to select temperature setting. · Adjust the "TEMPERATURE" knob to display the temperature of the solution on the LCD. · Select the appropriate conductivity range. Note: If the display shows "1", there is an over-range condition. The LCD will display the temperature compensated conductivity reading. · Press the "COND/ C" key to select conductivity reading. · Select the appropriate conductivity range. 8 9 CALIBRATION The instrument should be re-calibrated at least once a month, or when the probe is changed. 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). 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. Choose a solution with a conductivity value close to the solution to be measured. This is to minimize contamination of the calibration solution and secure higher accuracy. When possible, use plastic beakers to minimize any EMC interferences. · Press the "COND/ C" key to select conductivity reading and select the appropriate range: "199. 9 µS" for HI7033/HI8033, "1999µS" for HI7031/HI8031, "19. 99 mS" for HI7030/HI8030, "199. 9 mS" for HI7034/HI8034. Note: If the display shows "1", there is an over-range condition. · Allow a few minutes for the reading to stabilize and adjust the "CALIBRATION" knob to read (on the LCD) the value of the buffer solution at 25 C (77 F), e. g. 12. 88 mS/cm. PROCEDURE FOR EC 214: · Pour a small quantity of the conductivity solution, e. g. · Immerse the probe in the solution submerging the holes of the sleeve (0. 5 cm below). Tap the probe lightly on the bottom of the beaker to remove any air bubbles trapped inside the sleeve. Take the temperature of the solution with a CHECKTEMP or a glass thermometer. · Press the "COND/ C" key to select temperature setting. · Adjust the "TEMPERATURE" knob to display the temperature of the solution on the LCD. · 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 (on the LCD) the value of the buffer solution at 20 C (68 F), e. g. · Calibration is now complete and the instrument is ready for use. 0 703 HI PROCEDURE FOR EC 215: · Pour a small quantity of the conductivity solution, e. g. [. . . ] 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. 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. [. . . ]