User manual HANNA INSTRUMENTS HI8521

[. . . ] Instruction Manual HI8417 - HI8519 HI8520 - HI8521 Microprocessor Bench-top pH Meters HI 84 17 °C pH ON OFF t3 d3 BUFF ER VA d1 LUES NB 20°C t1 STD S pH 6, 8 d2 pH NB 7, 02 8 STD S pH 4, 0 pH NBS 4, 00 0 pH STD 9, 2 pH 10, 05 2 t2 CAL CON °C °C pH mV http://www. hannainst. com These Instruments are in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for the correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications. These instruments are in compliance with CSA, UL and (EN 50081-1 and EN 50082-1) directives. TABLE OF CONTENTS PRELIMINARY EXAMINATION GENERAL DESCRIPTION FUNCTIONAL DESCRIPTION AND SPECIFICATIONS: HI8417 HI8519 HI8520 HI8521 OPERATIONAL GUIDE PH CALIBRATION PROCEDURE FOR HI8417 PROCEDURE FOR HI8519 PROCEDURE FOR HI8520/HI8521 CAL. [. . . ] For greatest accuracy, however, it is recommended that a two-point calibration is performed. · Rinse the electrode and the temperature probe before immersing them into pH 4. 01/ pH10. 01 (or 9. 18) calibration buffer, shake briefly and wait for thermal equilibrium. 19 · The meter automatically recognizes the buffer value and prompts for the second at "d2" or "t2" (= pH 4. 01, acid) or "d3" or "t3" (pH 9. 18 and pH10. 01 respectively, alkaline). CON · Press the CON key to confirm the pH value. · The display will indicate the temperature compensated buffer value e. g. if the temperature is at 25°C, the display will show "pH 4. 01" or "10. 01" or "pH 9. 18", depending on the solution being used. If the temperature is at 20°C, the display will show respectively "pH 4. 00" or "pH 10. 06" or "pH 9. 22" (see page 23). °C pH · Press CON key again to confirm calibration. · The pH symbol will stop flashing and the unit is ready for measurements. · If the reading is drifting, turn the meter off and repeat the calibration procedure waiting longer for the reading to stabilize. However, usually 1 or 2 minutes is enough time to prevent a drifting reading. Note: If you need to unplug the instrument, press the OFF key thus switching the instrument off before disconnecting the power cord. In the case of a power failure while the instrument is operational, recalibration might be required. PH CALIBRATION FOR HI8519 Note: If you need to calibrate to NBS standards, use pH 6. 86 (HI7006 or HI8006) and pH 9. 18 (HI7009 or HI8009) instead of pH7. 01 and 10. 01 respectively. Use a ChecktempC or a glass thermometer with an resolution of 0. 1° as reference thermometer. 20 Procedure: · Switch the instrument on after connecting the pH electrode. · Rinse and immerse the pH electrode in pH 7. 01 buffer and shake briefly. · Note the temperature of the buffer solution using a ChecktempC or a glass thermometer (e. g. 20°C). Adjust the Temperature °C knob until display shows the noted temperature. °C ON OFF °C °C °C pH TEMPERATURE °C · Press the pH key to select pH measurement. · Wait 1-2 minutes and adjust the OFFSET knob until display shows the pH value at the noted temperature (see the pH versus temperature chart at page 23). · Rinse and immerse the pH electrode in pH 4. 01/pH 10. 01 buffer and shake pH briefly. · Wait 1-2 minutes and adjust the SLOPE knob until display shows the pH value at the noted temperature (see the pH versus temperature chart at page 23). · The pH calibration is now complete. pH OFFSET SLOPE PH CALIBRATION FOR HI8520 AND HI8521 Procedure: · Switch instrument on after connecting the pH electrode and the temperature probe. · Immerse the pH electrode and the temperature probe in pH 7. 01 buffer solution, shake briefly and wait 1 or 2 minutes for thermal equilibrium. · Press the RANGE key to display pH measurement. 21 ON OFF 4 cm (1½") RANGE · Press the CAL key. if the buffer temperature is at 25°C, the display will show pH7. 01. If the buffer temperature is at 20°C, display will show pH 7. 03 (see page 23). [. . . ] Use: food processing. 9. 5mm DIA 0. 37" 12 mm 0. 5" FC 220 120 mm 4. 7" FC 911B Plastic-body (Kynar®), double junction, refillable with built-in amplifier, combination pH electrode. Use: very high humidity. 12 mm 0. 5" FC 911 110 mm 4. 3" HI 1413B Glass-body, single junction, flat tip, Viscolene, non-refillable, combination pH electrode. Use: surface measurement. 12 mm 0. 5" HI 1413 110 mm 4. 3" Ultem® is registered Trademark of "General Electrics Co. " Kynar® is registered Trademark of "Pennwalt Corp. " 34 ORP electrodes: HI 3131B Glass-body, refillable, combination platinum ORP electrode. Use: titration. 12 mm 0. 5" HI 3131 150 mm 5. 9" "S" VERSION HI 3230B Plastic-body (Ultem®), gel-filled, combination platinum ORP electrode. [. . . ]