User manual HANNA INSTRUMENTS EC215

[. . . ] 5 FUNCTIONAL DESCRIPTION EC 215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SPECIFICATIONS EC 215 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · 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 the temperature coefficient value of the solution (see "Determination of the Temperature Coefficient of a Solution" section for details). TAKING CONDUCTIVITY MEASUREMENTS WITH EC214 · Switch the instrument on by pressing ON/OFF. · 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. · Adjust the "TEMPERATURE" knob to display the temperature of the solution on the LCD. · Select the appropriate conductivity range. · Press the "COND/°C" key to select conductivity reading. · 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. 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. 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. · 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. · 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. [. . . ] Reproduction in whole or in part is prohibited without the written consent of the copyright owner. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. 18 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. During calibration of instruments, ESD wrist straps should be worn to avoid possible damage to the sensor by electrostatic discharge. [. . . ]