User manual HANNA INSTRUMENTS HI 9214

[. . . ] This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. 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. [. . . ] · Connect the pH electrode to the screw type connector on the meter. Be sure that the electrode and the meter connections are clean and dry to ensure a positive contact. Turn the meter on by pressing ON/OFF. Note: After use, rinse the electrode with water to minimize contamination and store it with a few drops of storage (HI 70300) or pH7 (HI 7007) solution in the protective cap. Note: Always turn the meter OFF and replace the electrode protective cap after use. NEVER USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES. pH CALIBRATION · Connect the electrode and switch the meter ON. · Enter the Calibration mode by pressing the CAL button. · For a single-point calibration, place the electrode in any buffer, eg. The meter will automatically recognize and display the buffer value. · When the pH tag stops blinking, press the SET/HOLD button to confirm the calibration point. Note: If the pH 7. 01 buffer was used, press the SET/HOLD button again to exit the Calibration mode; the first calibration point is stored and the meter returns to the measurement mode. Otherwise, if a different buffer was used, the meter will automatically return to normal mode. · For a two-point calibration, place the electrode in pH 7. 01 buffer. The meter will automatically recognize and display the buffer value. · When the pH tag stops blinking, press the SET/HOLD button to confirm and store the first calibration point. · The meter will then ask for the second buffer. Place the electrode in pH 4. 01 (or pH 10. 01) buffer. · When also this buffer is recognized (the pH tag stops blinking), press the SET/HOLD button to confirm and store the second calibration point; the meter will return to normal mode. Note: If a solution with wrong pH value is used as buffer for calibration, the LCD will display the "Ec" message. Note: To exit the Calibration mode, press the CAL button at any time. The meter will display dashes and then return to normal mode. [. . . ] The reading will be frozen on the LCD. BATTERY REPLACEMENT When the battery becomes weak, the battery symbol on the LCD will light up and, at startup, the meter displays the "Eb" message for a few seconds. When the low battery indicator appears, only a few hours of battery life is remaining. It is recommended to replace the battery immediately. The meter is also provided with BEPS (Battery Error Preventing System), which avoids any erroneous reading due to low battery level by warning the user with the "Eb" message on the LCD and switching the meter off when the battery is completely rundown. [. . . ]