Hanna Instruments pH 209V User Manual

Page 7

ACCESSORIES

pH CALIBRATION SOLUTIONS
HI 50003-01

pH 3.00 buffer solution, 20 mL sachet, 10 pcs

HI 50003-02

pH 3.00 buffer solution, 20 mL sachet, 25 pcs

HI 70007P

pH 7.01 buffer solution, 20 mL sachet, 25 pcs

HI 5003

pH 3.00 buffer solution, 500 mL bottle

HI 7006L

pH 6.86 buffer solution, 500 mL bottle

HI 7007L

pH 7.01 buffer solution, 500 mL bottle

HI 8006L

pH 6.86 buffer solution in FDA bottle, 500 mL

HI 8007L

pH 7.01 buffer solution in FDA bottle, 500 mL

ELECTRODE STORAGE SOLUTION
HI 70300L

Storage solution, 500 mL bottle

HI 80300L

Storage solution in FDA bottle, 500 mL

ELECTRODE CLEANING SOLUTIONS
HI 70000P

Electrode rinsing solution, 20 mL sachet, 25 pcs

HI 7061L

General cleaning solution, 500 mL bottle

HI 70635L

Cleaning solution for wine deposits, 500 mL bottle

HI 70636L

Cleaning solution for wine stains, 500 mL bottle

HI 7073L

Protein cleaning solution, 500 mL bottle

HI 7074L

Inorganic cleaning solution, 500 mL bottle

HI 7077L

Oil & Fat cleaning solution, 500 mL bottle

HI 8061L

General cleaning solution in FDA bottle, 500 mL

HI 8073L

Protein cleaning solution in FDA bottle, 500 mL

HI 8077L

Oil & Fat Cleaning solution in FDA bottle, 500 mL

ELECTROLYTE SOLUTION
HI 7082

3.5M KCl electrolyte solution, 4 x 30 mL, for double junction
electrodes

HI 8082

3.5M KCl electrolyte solution in FDA bottle, 4 x 30 mL, for
double junction electrodes

ORP PRETREATMENT SOLUTIONS
HI 7091L

Reducing pretreatment solution, 500 mL bottle

HI 7092L

Oxidizing pretreatment solution, 500 mL bottle

Cleaning procedure
After use, clean the electrode by immersing it in the proper cleaning solution (HI
700635 or HI 700636) for 5 minutes.
If case of slow and unreliable readings, it is recommended to perform the
following procedure for cleaning the junction:
1. Shift upwards the PTFE collar. If the collar does not shift easily, immerse it

into warm water.

2. Wipe gently the electrode surface with a soft and clean tissue.
3. In case of persistent wine or must residual, wet the tissue with cleaning

solution (HI 700635 or HI 700636).

4. Put back the collar in its original position.

Troubleshooting
Evaluate your electrode performance based on the following.
• Noise (Readings fluctuate up and down) could be due to:

– Clogged/Dirty Junction: refer to the cleaning procedure above.
– Loss of shielding due to low electrolyte level (in refillable electrodes

only): refill with fresh HI 7082 solution.

• Dry Membrane/Junction: soak in HI 70300 storage solution for 1 hour.
• Drifting: soak the electrode tip in warm (approx. 50-60°C) HI 7082

solution for one hour and rinse the tip with distilled water. Refill with fresh
HI 7082 solution.

• 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 solution for 30

minutes, rinse thoroughly in distilled water and then follow the cleaning
procedure above.