User manual HANNA INSTRUMENTS PH 209V

[. . . ] 4 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 pH CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 pH VALUES AT VARIOUS TEMPERATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · Connect the ORP electrode to the meter and submerge the tip (4 cm / 1½") into the sample to be tested. · Press the mV key to enter the mV mode and allow a few minutes for the reading to stabilize. · The display will show the ORP (mV) value. 4 cm (1½") TAKING pH MEASUREMENTS Make sure that the instrument has been calibrated for pH before taking pH measurements. · Immerse the electrode tip (4 cm/1½") into the sample and shake briefly. 4 cm (1½") · Take the temperature of the solution with the supplied HI 98501 thermometer (e. g. · Press the °C key to display temperature setting on the LCD and adjust the temperature knob to display the temperature of the sample. AFTER MEASUREMENTS · Press the ON/OFF button to switch the instrument off. 6 7 pH CALIBRATION IMPORTANT For better accuracy it is recommended to calibrate the instrument frequently. Calibration should be performed whenever the pH electrode is replaced, after performing a cleaning procedure or changing the reference electrolyte, and at least once a month. · Wait a couple of minutes, then adjust the OFFSET knob until the display shows the pH value at the noted temperature (see the "pH versus temperature" chart at page 10). INITIAL PREPARATION Pour small quantities of pH 7. 01 (HI 7007) and pH 3. 00 (HI 5003) solutions into clean beakers. CALIBRATION RINSE For accurate calibration, use two beakers for each buffer solution; the first for rinsing the HI 7007 HI 7007 electrode, the second for calibration. Note: The electrode should be submerged at least 4 cm (1½") into the solution. PROCEDURE Note: If you need to calibrate to NBS standards, use pH 6. 86 (HI 7006) solution instead of pH 7. 01. · Rinse and immerse the pH electrode in pH 7. 01 buffer and shake briefly. · Note the temperature of the buffer solution using the supplied HI 98501 thermometer (e. g. · Press the °C key to select temperature setting, then adjust the Temperature knob until the LCD shows the noted temperature. · Rinse and immerse the pH electrode in pH 3. 00 buffer and shake briefly. · Wait a couple of minutes, then adjust the SLOPE knob until the display shows the pH value at the noted temperature (see the "pH versus temperature" chart at page 10). · The pH calibration is now complete. 4 cm (1½") 8 9 pH VALUES AT VARIOUS TEMPERATURES pH readings are strongly affected by temperature. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. For manual temperature calibration please refer to the following chart. pH ELECTRODE MAINTENANCE Note: To prevent damage to the electrode, remove the pH electrode from the sample before turning the meter off. With the meter OFF, detach the electrode from the meter and immerse it in the storage solution. Do not be alarmed if any salt deposits are present: this is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may have formed inside the glass bulb. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer. Sensitive bulb To avoid clogging problems and ensure a fast response, the bulb must be kept moist at any time. [. . . ] 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. HI 8427 HI 931001 HI 98501 pH and ORP electrode simulator with 1 m (3. 3') coaxial cable ending in female BNC connectors pH and ORP electrode simulator with LCD and 1 m (3. 3') coaxial cable ending in female BNC connectors Pocket-size thermometer (range -50. 0 to 150. 0°C) 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 equipment, requiring the operator to take all necessary steps to correct interferences. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. During calibration of instruments, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharge. [. . . ]