Hanna Instruments HI 98240, Instruction Manual, Page: 18 / 21

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• Dry Membrane/Junction: soak in HI 70300 storage solution
for at least 1 hour.
• Drifting: Soak the electrode tip in warm HI 7082 solution for
one hour, then flush the tip with distilled water. Refill with fresh
HI 7071 for single junction electrodes, or HI 7082 for double
junction electrodes.
• Low Slope: refer to the cleaning procedure above.
• No Slope: check the electrode for cracks in glass stem or bulb
and replace the electrode.
• Slow Response/Excessive Drift: soak the tip in HI 7061
Hanna solution for 30 minutes, rinse thoroughly in distilled water
and then follow the Cleaning Procedure above.
ACCESSORIES
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 buffer solution, 20 mL sachet, 25 pcs
HI 70007P pH 7.01 buffer solution, 20 mL sachet, 25 pcs
HI 70010P pH 10.01 buffer solution, 20 mL sachet, 25 pcs
HI 7004L pH 4.01 buffer solution, 500 mL bottle
HI 8004L pH 4.01 buffer solution, 500 mL FDA bottle
HI 7006L pH 6.86 buffer solution, 500 mL bottle
HI 8006L pH 6.86 buffer solution, 500 mL FDA bottle
HI 7007L pH 7.01 buffer solution, 500 mL bottle
HI 8007L pH 7.01 buffer solution, 500 mL FDA bottle
HI 8009L pH 9.18 buffer solution, 500 mL FDA bottle
HI 7009L pH 9.18 buffer solution, 500 mL bottle
HI 7010L pH 10.01 buffer solution, 500 mL bottle
HI 8010L pH 10.01 buffer solution, 500 mL FDA bottle
ELECTRODE MAINTENANCE SOLUTIONS
HI 70300L Storage solution, 500 mL bottle
HI 80300L Storage solution, 500 mL FDA bottle
HI 70000P Electrode rinsing solution, 20 mL sachet, 25 pcs
HI 7061L General cleaning solution, 500 mL bottle
HI 8061L General cleaning solution, 500 mL FDA bottle
HI 7073L Protein cleaning solution, 500 mL bottle
HI 8073L Protein cleaning solution, 500 mL FDA bottle
HI 7074L Inorganic cleaning solution, 500 mL bottle
HI 8074L Inorganic cleaning solution, 500 mL FDA bottle
HI 7077L Oil & Fat cleaning solution, 500 mL bottle
HI 8077L Oil & Fat cleaning solution, 500 mL FDA bottle
HI 7072 1M KNO
3
electrolyte solution, 4 x 50 mL bottle
HI 8072 1M KNO
3
electrolyte solution, 4 x 50 mL FDA bottle
HI 7082 3.5M KCl electrolyte solution, 4 x 50 mL bottle, for
double junction electrodes
HI 8082 3.5M KCl electrolyte solution, 4 x 50 mL FDA bottle, for
double junction electrodes
ORP PRETREATMENT SOLUTIONS
HI 7091L Reducing pretreatment solution, 500 mL bottle
HI 7092L Oxidizing pretreatment solution, 500 mL bottle