Horiba Scientific LAQUA-PD210, Инструкция по эксплуатации

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Maintenance and storage
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● Maintenance and storage of electrodes
This section describes an overview of the procedures for maintenance and storage of pH, ORP
and DO electrodes.
● How to clean the pH and ORP electrodes
Always clean the electrode with deionized water after every measurement. When the response
is slow or residue from the sample adheres to the electrode, use the appropriate method below
to clean the electrode, and then clean again with deionized water.
For pH electrode
For ORP electrode
● How to clean the membrane of DO electrode
The membrane of DO electrode is extremely thin. Take care, not to tear the membrane when
cleaning. Clean the membrane with deionized water and wipe it with a soft cloth, take care not
to damage it.
When using a neutral cleaning solution to clean the DO electrode, keep the neutral cleaning
solution away from the membrane in order to prevent deterioration of the membrane.
Type of dirt Cleaning solution
General Diluted neutral cleaning solution
Oil Alcohol, or diluted neutral cleaning solution
Inorganic substance 1 mol/L HCl or electrode cleaning solution
Protein Cleaning solution including protein-removing enzyme
Alkali Dip in 1 mol/L HCl or electrode cleaning solution for 1h to 2 h
Type of dirt Cleaning solution
General
Dilute neutral cleaning solution (General dish washing liquid
works reasonably well.)
Oil
Inorganic substance Immerse dilute nitric acid (1:1 nitric acid)
Note