User manual HANNA INSTRUMENTS HI 931000

[. . . ] Instruction Manual HI 8014 · HI 8915 HI 931000 Portable pH Meters www. hannainst. com 1 Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for a correct use of the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. These instruments are in compliance with the directives. PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipment. [. . . ] If you need to calibrate HI 8014 and HI 8915 to NBS standards, use pH 6. 86 (HI 7006) instead of pH 7. 01 and pH 9. 18 (HI 7009) instead of pH 10. 01. · Wait a couple of minutes, then adjust the mV/pH trimmer until the LCD shows the pH value at the noted temperature (see page 18 for pH vs. temperature chart). PROCEDURE FOR HI 8014 · Remove the protective cap from the electrode, rinse and immerse it in pH 7. 01 buffer and stir gently. · Take the temperature of the buffer solution with a ChecktempC (or another accurate thermometer), e. g. Note: The electrode should be submerged approximately 4 cm (1½") into the solution. The ChecktempC should be located as close as possible to the pH electrode. °C pH mV/pH The pH calibration is now complete. PROCEDURE FOR HI 8915 · First connect the pH electrode and the temperature probe to the instrument, then switch it ON. · Remove the electrode protective cap, rinse the electrode tip with some pH 7. 01 solution, then immerse the pH electrode and temperature probe in a pH 7. 01 buffer solution. HI 7007 HI 7007 14 15 · Stir gently and wait a couple of minutes for thermal equilibrium. Note: The electrode should be submerged approximately 4 cm (1½") into the solution. The temperature probe should be located as close as possible to the pH electrode. 20. 0°C). °C ºC PROCEDURE FOR HI 931000 · Turn the meter on. Note: The "" indicator blinks when the reading is not stable. · Press CAL and the display will flash "7. 01 ". CAL pH · Press the pH key to read pH values. · Adjust the OFFSET trimmer on the front panel until LCD shows the pH value at the noted temperature (see the pH vs. temperature chart on page 18). pH · Remove the electrode protective cap, rinse the electrode tip with some pH 7. 01 solution, then immerse the pH electrode and temperature probe in a pH 7. 01 buffer solution. · Stir gently and wait a couple of minutes for thermal equilibrium. Note: The electrode should be submerged approximately 4 cm (1½") in the solution. · When electrode has stabilized, the "" indicator stops flashing. Press CFM to confirm the first buffer solution. 4 cm (1½") OFFSE T CFM · Rinse and immerse pH electrode and temperature probe in pH 4. 01 or pH 10. 01 buffer (2nd calibration point); stir gently. HI 7004 · Wait a couple of minutes and adjust the SLOPE trimmer on the front panel until the LCD shows the pH value at the noted temperature. pH SLOPE · To quit the calibration mode and save a one-point (offset) procedure, press the ON/OFF key. For best accuracy, however, it is recommended to perform a two-point calibration. · Rinse the electrode with the second buffer solution (pH 4. 01 or pH 10. 01). · Dip the electrode into the buffer solution, stir gently and wait until the instability indicator "" stops flashing. Press CFM to confirm the second buffer solution. The pH calibration is now complete. CFM The meter is now calibrated and will return to operational mode. 16 17 pH VALUES AT VARIOUS TEMPERATURES For manual temperature compensation during calibration, please refer to the following chart. TEMP °C °F 32 0 41 5 50 10 59 15 68 20 77 25 86 30 95 35 40 104 45 113 50 122 55 131 60 140 65 149 70 158 pH VALUES 7. 01 9. 18 7. 13 9. 46 9. 39 7. 10 9. 33 7. 07 9. 27 7. 04 9. 22 7. 03 9. 18 7. 01 9. 14 7. 00 9. 10 6. 99 9. 07 6. 98 9. 04 6. 98 9. 01 6. 98 8. 99 6. 98 8. 97 6. 98 8. 95 6. 99 8. 93 6. 99 TEMPERATURE CALIBRATION HI 8915 and HI 931000 have been accurately precalibrated for temperature at the factory. [. . . ] HI1131B / HI1111S Glass body, single junction, refillable, combination pH electrode. HI1330B / HI1310S Glass body, semimicro, single junction, refillable, combination pH electrode. HI1331B / HI1311S Glass body, semimicro, single junction, refillable, combination pH electrode. HI1230B / HI1210S Plastic body, double junction, gel-filled, combination pH electrode. [. . . ]