horiba LAQUA-PC1500, Instruction Manual

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Maintenance and Storage
63
For Conductivity Electrode
Always clean the cell in pure water (or deionized water) after every measurement. When the
response is slow or residue from the sample adheres to the cell, use the appropriate method
below to clean the cell, and then clean again with pure water (or deionized water).
● Daily storage of pH and ORP electrodes
If the electrode becomes dry, the response will be slow. Store in a moist atmosphere. Follow
the steps below to properly store the electrode:
1. Wash the electrode well with pure water (or deionized water) to remove sample
completely, and close the internal solution filler port.
2. Wash the inside of the protective cap with pure water (or deionized water), then add
enough pure water (or deionized water) to soak the sponge.
3. Attach the protective cap.
● Daily storage of the conductivity electrode
If the electrode is stored in a dry state, the cell constant will change. Store with the black
electrode part immersed in deionized water, or with the protective cap filled with deionized
water and attached to the electrode.
To store the electrode for a long period, clean it well and attach the protective cap filled with
deionized water.
• When the electrode will not be used for a long period, store it by following the electrode stor
-
age procedure detailed above.
• For pH and ORP electrodes, replace the reference electrode internal solution with new solu
-
tion once every 3 to 6 months.
Type of dirt Cleaning solution
General Diluted neutral cleaning solution
Inorganic substance Ethanol (keep the ethanol away from plastic parts)
Scale that formed during
long term storage
A commercially available scale remover (neutral cleansing
solution for kitchen use, etc.) diluted by a factor of 100. If this
does not remove the scale, use diluted solution that contains
oxygen bleach (sodium percarbonate) or chlorine bleach
(sodium hypochlorite).
Note