Horiba Scientific LAQUAact D-75G, Инструкция по эксплуатации

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Maintenance and storage of the ORP electrode
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Maintenance and storage of the ORP electrode
For the detailed procedures for maintaining and storing electrodes, refer to the
instruction manual for each electrode. This section describes an overview of the
procedures for maintenance and storage to be performed as part of daily use.
• How to clean the electrode
When the tip of an electrode (responsive membrane and liquid junction) becomes dirty,
the response speed may slow or an error may occur in the measurement results. To
avoid such error, clean the electrode. For dirt that cannot be washed off by pure water (or
deionized water), use the cleaning solution indicated below depending on the type of dirt.
After cleaning, rinse the electrode with pure water (or deionized water).
• Daily storage of the electrode
If the electrode becomes dry, the response will 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.
• When the electrode will not be used for a long period
To store the electrode for a long period, follow the electrode storage procedure above,
and in addition, use a dropper or similar tool to replace the reference electrode internal
solution (model 300) with new solution. Replace once every three to six months.
Type of dirt Cleaning solution
General
Diluted neutral cleaning solution
Oil
Inorganic substance
Immerse dilute nitric acid (1:1 nitric acid)