Environmental Express Oakton 300 Series, Инструкция по эксплуатации

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Maintenance and storage of pH sensor
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Maintenance and storage of pH sensor
This section describes an overview of the procedures for maintenance and storage of
pH sensor.
How to clean the sensors
When the tip of a sensor (responsive membrane and liquid junction) becomes dirty, the
response time may slow or an error may occur in the calibration results. To avoid such
error, clean the sensor. For dirt that cannot be washed off by pure water (or deionized
water), use the cleaning solution indicates below depending on the type of dirt. After
cleaning, rinse the sensor with pure water (or deionized water).
However for pH sensor, different cleaning solutions should be used to clean different
types of dart.
<For pH sensor>
<For OPR sensor>
Daily storage of the sensors
If the sensor becomes dry, the response will slow. Store in a moist atmosphere. Follow
the steps below to properly store the sensor.
1. Wash the sensor well with pure water (or deionized water) to remove sample
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.
Note
When the sensor will not be used for a long period, store it by following the sensor storage
procedure detailed above.
Type of dirt Cleaning solution
General
Diluted neutral cleaning solution (General dish washing liquid
works reasonably well.)
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 1 mol/L HCl solution
Type of dirt Cleaning solution
General
Diluted neutral cleaning solution (General dish washing liquid
works reasonably well.)
Oil
Inorganic substance
Immerse into the dilute nitric acid (1:1 nitric acid)
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