User manual HANNA INSTRUMENTS HI 2210

[. . . ] Instruction Manual HI 2210 HI 2211 Microprocessor-based pH/mV/°C Bench Meters w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instruments. This manual will provide you with the necessary information for correct use of the instruments, as well as a precise idea of their versatility. [. . . ] The "CAL" and " " messages will appear and "7. 01" buffer will be displayed on the secondary LCD. CAL · When the reading is stable and close to the selected buffer, "READY" message will appear and "CFM" message will blink. · The calibrated value is then displayed on the primary LCD and the secondary LCD will display the second expected buffer value. CAL pH BUFFER pH BUF 2 Note: The instruments will automatically skip the buffer used for the first point. · After the first calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 4 cm (1½") into the second buffer solution and stir gently. · If necessary, press the ARROW keys to select a different buffer value. · The " " symbol will blink on the LCD until the reading is stable. · When the reading is stable, "READY" message will appear and "CFM" message will blink. Notes: · If the value measured by the meter is not close to the selected buffer, "WRONG " and "WRONG " messages will blink alternately. In this case check if the correct buffer has been used, or regenerate the electrode by following the cleaning procedure (see page 18). · The "WRONG" message and temperature value are displayed blinking if the temperature reading is out of the defined temperature range of the buffer. Calibration cannot be confirmed in this situation. pH BUFFER pH 1 CAL BUF · If necessary, press the ARROW keys to select a different buffer value. · The " " symbol will blink on the LCD until the reading is stable. 10 11 · Press RANGE to display the temperature reading on the LCD during calibration (HI 2211 only). ONE-POINT CALIBRATION · Proceed as described in "Two-point calibration" section. The instrument will return to measurement mode and will memorize the one-point calibration data. The instrument sets default calibration parameters, displays "CLR" message for a few seconds and then returns to normal measurement mode. TEMPERATURE CALIBRATION (for technical personnel only) All the instruments are factory calibrated for temperature. Hanna's temperature probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature measurements are inaccurate, temperature recalibration should be performed. For an accurate recalibration, contact your dealer or the nearest Hanna Customer Service Center, or follow the instructions bellow. Note: If the reading is not close to the selected calibration point, "WRONG" tag will blink. Change the temperature probe and restart calibration. ºC 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 ºF 32 41 50 59 68 77 86 95 104 113 122 131 140 149 158 167 176 185 194 203 During calibration the instrument will display the pH buffer value at 25 ºC. 14 15 ELECTRODE CONDITIONING & MAINTENANCE For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1") below the fill hole, add HI 7082 or HI 8082 3. 5M KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 3. 5M KCl+AgCl Electrolyte Solution for single junction electrodes. For AmpHel ® electrodes: If the electrode does not respond to pH changes, the battery is dead and the electrode should be replaced. Immerse the tip (bottom 4 cm /1½") into the sample and stir gently for a few seconds. For a faster response and to avoid cross-contamination of the samples, rinse the electrode tip with a few drops of the solution to be tested, before taking measurements. [. . . ] Use: emulsions. 12 mm 0. 5" HI 1230B Plastic-body (PEI), double junction, gel-filled, combination pH electrode. Use: general, field. 12 mm 0. 5" HI 1230 120 mm 4. 7" HI 1053 120 mm 4. 7" "S" VERSION "S" VERSION HI 1083B Glass-body, micro, Viscolene, non-refillable, combination pH electrode. Use: biotechnology, micro titration. 12 mm 0. 5" 5 mm 0. 2" 3 mm 0. 12" 3. 0 mm DIA 0. 12" HI 2031B Glass-body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products. 6 mm 0. 25" HI 2031 75 mm 2. 95" HI 1083 120 mm 4. 7" "S" VERSION HI 1131B Glass-body, single junction, refillable, combination pH electrode. [. . . ]