Hanna-instruments HI 84529 Manual do Utilizador descarregar pdf (Página 45)

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Maintenance

Storage Procedure

To assure a quick response time, the glass bulb should be kept moist and not

allowed to dry out. Replace the solution in the protective cap with a few drops

of HI 70300 or HI 80300 Storage Solution. The HI 5315 Reference may be

stored with its black cap and Fill hole covered. Rinse and rell before using.

Follow the Preparation Procedure on page 20 before taking measurements.

Periodic Maintenance

Inspect the electrodes and the cables. The cable used for connection to the

instrument must be intact and there must be no points of broken insulation

on the cable or cracks on the electrode stem or bulb. Connectors must be

perfectly clean and dry. If any scratches or cracks are present, replace the

electrode. Rinse o any salt deposits with distilled/deionized water.

pH Cleaning Procedure

General Soak in Hanna HI 7061 or HI 8061 General Cleaning

Solution for approximately ½ hour.

Milk deposits Soak in Hanna HI 70640 Cleaning Solution for milk

deposits for approximately ½ hour (pH half cell only).

Protein Soak in Hanna HI 7073 or HI 8073 Protein Cleaning

Solution for 15 minutes.

IMPORTANT: After performing any of the cleaning procedures, rinse the

electrode thoroughly with distilled or deionized water and soak the electrode

in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking

measurements.

Reference Electrode Cleaning

Drain the old ll solution, rinse with a few drops of HI 7072 solution, drain,

then rell with HI 7072 solution. Do not use an electrode if crystallized salts

are visible inside the electrode. Drain electrode, disassemble and rinse internal

body with deionized water. Reassemble and rell with fresh ll solution. The

internal chamber of this electrode is gell lled. If the electrode has been left dry

for long periods of time the gel may be dehydrated and stable measurements

may not be obtainable. Disassemble electrode and soak internal assembly in

HI 7072 ll solution. Verify the ceramic is wetted by the ll solution. Warming

the solution slightly (50°C) before soaking will hasten this process. Permit the

electrode to cool completely while immersed in this solution.

Electrode

Conditioning

and

Maintenance

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Hanna-instruments HI 84529 Manual do Utilizador Página 45