User manual HANNA INSTRUMENTS HI 9034

[. . . ] TEMPERATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 PROBE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 BATTERY REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] In this case, the next (higher) range should be selected. ON/OFF 6 7 TEMPERATURE EFFECT HI 76302W conductivity probe features a built-in temperature sensor that allows automatic compensation of the reading for any temperature differences. Wait for a few minutes for the temperature sensor to reach the thermal equilibrium with the test solution before taking measurements. If the temperature of conductivity probe and solution is drastically different, a longer time should be allowed. CALIBRATION For best results, choose a calibration solution with a conductivity or TDS value as close as possible to the sample to be measured. For example, for measurements in the 2 to 20 mS/cm range, use the HI 7030 (12. 88 mS/cm) conductivity calibration solution. For accurate calibration, use two beakers for each solution: the first one for rinsing the probe and the second one for calibration. For a complete list of HANNA instruments® calibration solutions see the "Accessories" section. AFTER MEASUREMENTS When all measurements are completed, turn the meter OFF and the clean the probe cleaned (see "Probe Maintenance" section for details). ON/OFF PROCEDURE FOR HI 9033 · Fill a beaker with 8 cm (3¼") of conductivity calibration solution (if possible fill two beakers, one for rinsing the probe and one for calibration). · Connect the probe to the meter securely by aligning the pins with the socket, pushing the plug in and tightening the threaded ring. · Immerse the probe into the beaker, while paying attention that the holes on the PVC sleeve are completely submerged. · Turn the instrument on by pressing the ON/OFF key and select the appropriate range (e. g. 19. 99 mS/cm). Note: Probe body and sleeve are made of PVC, and are susceptible to damage due to temperatures exceeding 60°C (140°F). If the probe is exposed to high temperature, the bond between the rings and the probe body may become impaired and the probe will not function properly. In this case, the probe will need to be replaced. ON/OFF 19. 99mS/cm · Tap the probe repeatedly on the bottom of the beaker and stir it to ensure that no air bubbles remain trapped inside the sleeve. · If the probe temperature is close to the solution temperature, the display will stabilize quickly and show the temperature compensated conductivity measurement. However, the ATC circuitry needs a few minutes for temperature compensation if the temperature difference is about 5°C (9°F). 8 9 · When the reading is stable, adjust the calibration trimmer to read the solution conductivity value @25°C. For example if using HI 7030, turn the trimmer to read 12. 88 mS/cm @ 25°C. mS The calibration is now complete and the instrument is ready for use. All subsequent measurements will be compensated to 25°C (77°F). Note: Calibration can also be standardized to have readings compensated to 20°C (68°F), by simply adjusting the trimmer to the calibration solution value at 20°C (68°F). For example, for HI 7030 adjust the trimmer to read 11. 67 mS/cm (see "Conductivity vs. If the instrument cannot be calibrated, refer to the "Probe Maintenance" section. · Tap the probe repeatedly on the bottom of the beaker and stir it to ensure that no air bubbles remain trapped inside the sleeve. · If the probe temperature is close to the solution temperature, the display will stabilize quickly and show the temperature compensated conductivity measurement. However, the ATC circuitry needs a few minutes for temperature compensation if the temperature difference is about 5°C (9°F). · When the reading is stable, adjust the calibration trimmer to read the solution conductivity value @25°C. [. . . ] Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV equipment. The metal band at the end of the probe is sensitive to electrostatic discharges. During calibration ESD wrist straps should be worn to avoid possible damage to the probe by electrostatic discharge. Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. [. . . ]