User manual HANNA INSTRUMENTS HI 9142

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Manual abstract: user guide HANNA INSTRUMENTS HI 9142

Detailed instructions for use are in the User's Guide.

[. . . ] 1 Functional Description Probe . . . . . . . . . . . . . . . . . . . . . . 2 Functional Description Meter . . . . . . . . . . . . . . . . . . . . . . . 3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Initial Probe Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Whenever measurements are taken with a nonpolarized probe, the oxygen level revealed is both that of the tested solution as well as that present in the electrolyte solution. This reading is incorrect The calibration is very simple and fast. · Make sure the probe is ready for measurements (see initial preparation at page 7), i. e. the membrane is filled with electrolyte and the probe is connected to the meter. · Switch the meter on by pressing the ON/OFF key Zero Calibration: · Dip the probe into HI 7040 zero oxygen solution and stir gently for 2-3 minutes. · Allow 2 minutes for the LCD readout to stabilize. calibration trimmer until the display reads "0. 0". Note The zero calibration screw is located close to the probe connector. Slope Calibration: It is suggested to perform the slope calibration in satured air. · Rinse the probe in a large amount of clean water to remove any residual zero oxygen solution. · Dry the probe tip and allow a few minutes for the LCD readout to stabilize. · Adjust the slope trimmer on the top of the meter to read "100%" on the LCD (while still holding the CAL button). Note The slope calibration screw is located farthest from the probe connection. · Release the CAL key and the LCD will display the value in ppm of oxygen. CAL ON/OFF · For an accurate calibration, it is recommended that you wait at least 15 minutes to ensure precise conditioning of the probe. · Remove the protective cap from the D. O. probe. % The zero calibration of the HI 9142 is very stable, therefore this procedure needs only to be performed whenever the probe is replaced. However, because the slope calibration is more critical, it is recommended to perform this procedure every week. 6 7 TAKING MEASUREMENTS Make sure the meter has been calibrated and the protective cap has been removed. Immerse the tip of the probe in the sample to be tested. Make sure the temperature sensor is also immersed. For accurate dissolved oxygen measurements a water movement of 0. 3 m/sec is required at a minimum. This is to ensure that the oxygendepleted membrane surface is constantly replenished. A moving stream will provide adequate circulation. [. . . ] To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. All rights are reserved. 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. 14 15 OTHER PRODUCTS FROM HANNA · CALIBRATION AND MAINTENANCE SOLUTIONS · CHEMICAL TEST KITS · CHLORINE METERS · CONDUCTIVITY/TDS METERS · DISSOLVED OXYGEN METERS · HYGROMETERS · ION SPECIFIC METERS (Colorimeters) · MAGNETIC STIRRERS · pH/Na/NaCl METERS · pH/ORP/Na ELECTRODES · PROBES (DO, µS/cm, RH, T, TDS) · PUMPS · REAGENTS · SOFTWARE · THERMOMETERS · TITRATORS · TRANSMITTERS · TURBIDITY METERS · Wide Range of Accessories Most Hanna meters are available in the following formats: · BENCH-TOP METERS · POCKET-SIZED METERS · PORTABLE METERS · PRINTING/LOGGING METERS · PROCESS METERS (Panel and Wallmounted) · WATERPROOF METERS · METERS FOR FOOD INDUSTRY For additional information, contact your dealer or the nearest Hanna Customer Service Center. You can also e-mail us at: tech@hannainst. com. CE DECLARATION OF CONFORMITY Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. [. . . ]

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