User manual HANNA INSTRUMENTS HI 9110

[. . . ] This instrument is in compliance with the directives. FUNCTIONAL DESCRIPTION SPECIFICATIONS Range Resolution Accuracy (@20°C/68°F) Typical EMC Deviation Temperature Compensation 0. 00 to 14. 00 pH 0. 01 pH ±0. 02 pH ±0. 05 pH Manual, through trimmer, from 0 to 100°C PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipment. If noticeable damage is evident, notify your dealer. Note: Save all packing material until you are sure that the instrument functions correctly. [. . . ] Reproduction in whole or in part is prohibited without the written consent of the copyright owner. 1. "ON/OFF" key, to turn the meter ON and OFF 9. "pH/°C SET" key, to select pH measurement or manual temperature setting mode Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. ISTR9110 06/03 OPERATIONAL GUIDE Initial preparation Install the supplied batteries by following the instructions in the "Battery replacement" section. Connect the HI 1048B pH electrode to the BNC plug on the top of the meter. Taking measurements · Turn the instrument ON. · Remove the electrode protective cap, submerge the tip (4cm/1. 5") into the sample to be tested and allow the reading to stabilize. · Since pH readings are directly affected by temperature, for accurate measurements, follow the instructions for manual temperature compensation. If the temperature of the sample is significally different from that at which the electrode was stored, allow a few minutes to reach thermal equilibrium. Notes: · Before taking any measurements: - make sure the meter is calibrated. - rinse the electrode thoroughly with some of the sample to be tested, to avoid cross contamination. · After use, switch the instrument off, clean the electrode with HI 70635 and/or HI 70636 solution (see "Accessories" section) and then rinse with clean water. Pour a few drops of HI 70300 storage solution in the protective cap and replace it before storing the electrode. · It is recommended to always keep the electrode wet. Manual temperature compensation · Press the "pH/°C SET" key to select the manual temperature mode. · Remove the protective cap on the top of the meter to access the trimmers. · Measure the temperature of the solution with the supplied ChecktempC thermometer. · Using the supplied screwdriver, adjust the "T" trimmer to display the measured temperature value, e. g. 15. 0°C. Note: Once the calibration procedure is completed, replace the trimmer cover and tighten it to ensure a watertight seal. [. . . ] Unscrew the two screws on the meter back, remove the battery compartment cover and replace all the four batteries with new ones, while paying attention to the correct polarity. Reattach the cover and tighten the two screws. · Rinse first with clean water and then with a small amount of pH 3. 00 buffer. Dip the electrode and the ChecktempC into the pH 3. 00 buffer, stir gently and wait for the reading to stabilize. Record the buffer temperature and adjust the "T" trimmer accordingly. [. . . ]