User manual HANNA INSTRUMENTS HI 98402

[. . . ] Instruction Manual HI 98402 Waterproof and Accurate Fluoride Meter www. hannainst. com 1 Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the meter. This manual will provide you with the necessary information for a correct use of the instrument, as well as a more precise idea of its versatility. If you need additional technical information, do not hesitate to email us at tech@hannainst. com. [. . . ] · Attach the fluoride and reference electrodes and the temperature probe to their respective connectors on top of the meter. · Switch the meter on by pressing the ON/OFF button. Note: For best results, it is recommended to prepare two beakers for each calibration point: the first one to rinse the probes and the second one to calibrate. Note: It is recommended to use clean plastic beakers. CALIBRATION PROCEDURE Note: If the fluoride electrode is new, or it has not been used for a few days, it must be soaked in a solution of HI 4010-10 (10 ppm fluoride solution + TISAB) for at least 3 hours prior to measurement. · Rinse the electrodes with deionized water and dry them attentively with a non-abrasive cloth. · Immerse the fluoride and the reference electrode as well as the temperature probe at least 1 cm (½") in the calibration solution. Make sure that the electrodes are not touching the bottom of the beaker. Immerse the temperature probe close to the tip of the other electrodes. 8 · Press CAL. The display will show "CAL" and "BUF" together with an intermittent "~" symbol. The upper display will show the calibration point (10 ppm) with the temperature of the solution shown on the lower LCD. · If the STD button is pressed, the instrument cycles through all the available calibration values. Choose the point corresponding to the first calibration solution. · When the CON symbol appears, it means that the calibration solution has been recognized and the reading has stabilized. Press CFM to confirm the first calibration point. Note: If the calibration solution value measured by the meter is too far from the ideal value, the " " symbol starts blinking to indicate an error in the calibration procedure. Ensure that the calibration solution is fresh and the correct one (in this case 10 ppm), and that the electrodes are in good working condition. Repeat the procedure with fresh and/or new solutions and electrodes. · After pressing CFM, the display shows the second calibration point. It is always recommended to perform a two-point calibration. However, to exit the calibration procedure at this point, press CAL. · Press STD to choose the point corresponding to the second calibration solution. The instrument cycles through all the available calibration values, skipping the standard used as the first calibration point. 9 · Immerse the fluoride and reference electrodes at least 1 cm (½") in the second calibration solution. Make sure that the electrodes are not touching the bottom of the beaker. [. . . ] If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Customer Service department and then send it with shipping costs prepaid. [. . . ]