Installation
BPD17 pH / Redox Monitor
Operating Guide
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For electrodes with soaker bottles ensure that the electrode is stored upright in the soaker bottle, and
replace the bottle solution with 3.8 Molar Potassium Chloride (KCl) saturated solution approximately
every 6 months.
Depending on the issue the following glass body pH electrode maintenance procedures can be carried
out:
Initial Cleaning – Wash the electrode with a solution of liquid detergent and warm water by gently
scrubbing with a soft tooth brush or wet tissue. Follow this by thoroughly rinsing the electrode in
deionised water or clean tap water.
Inorganic Scale Deposits – Dissolve the deposit by immersing the electrode bulb only in a solution
of dilute (10%) Hydrochloric Acid for a few minutes. Follow the supplier’s data sheet when
handling acids and dispose of as instructed by your local authority regulations.
Organic Oil or Grease Films – Wash the electrode with a solution of liquid detergent and warm water
by gently scrubbing with a soft toothbrush or wet tissue. Follow this by soaking the pH electrode for
between 10 and 30 minutes in a 3.8 Molar KCl solution.
Plugged or Dry Wick – Remove contaminate with one of the above cleaning procedures. Then soak
the electrode in an 80°C, 3.8 Molar KCl solution for 30 minutes. Before allowing the electrode to cool
in the same solution to promote flow of internal electrolyte through the liquid junction.
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