Glp; Calibration Reminder; Maintenance Of Electrodes - Consort R361 Mode D'emploi

GLP

Calibration reminder

Maintenance of electrodes

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1. Select the desired mode with çè and then press CAL.
2. Select [GLP] and press CAL.
3. Select [SHOW REPORT] and press CAL. Browse with çè é ê to show a com-
plete calibration report.
4. Select [SEND REPORT] and press CAL to send the report to the digital port.
1. Select the desired mode with çè and then press CAL.
2. Select [GLP] and press CAL.
3. Select [INTERVAL] and press CAL.
4. Select the desired time interval between each automatic warning for a new
calibration of the electrodes and press CAL.
A pH electrode is active and stable only after wetting! For this purpose it must
be immersed for at least ten hours in a 3...4 M KCl solution. During short inter-
ruptions (e.g. storage) the electrode should be immersed in a 3...4 M KCl solution.
In doing this it is always kept ready for use. When the interruption is longer than
a month, refill the closing cap with 3...4 M KCl and plug it on the electrode tip in
order to protect the glass bulb. Before use, ensure that the reference part of the
electrode is topped up with a 3...4 M KCl solution. A polluted electrode may be
cleaned with a soft detergent or 0.1 M HCl. Greasy substances may be removed
with acetone or alcohol (never do this with plastic electrodes!). The pH electrode
wears away by being used. If the electrode tends to respond slower and calibration
becomes difficult, even after cleaning, it should be replaced by a new one.
Metal electrodes (Pt, Ag, Au): Metal electrodes are always ready for use. During
short interruptions they are immersed in distilled water. They should be cleaned
regularly:
• Silver electrodes are immersed in a concentrated ammonia solution during one
hour.
• Platinum or gold electrodes are immersed in concentrated nitric acid during
one hour.
A conductivity cell is active and stable only after wetting! For this purpose it
must be immersed for at least one hour in distilled water. Rinse the cell always
after use and store it in distilled water (add some detergent to keep the spongy
platinum surface in perfect condition). A polluted cell may be cleaned with a soft
detergent or diluted nitric acid. Greasy substances may be removed with acetone
or alcohol (never do this with plastic electrodes!).
A dissolved oxygen electrode is active and stable only when polarised! The
electrode body has almost unlimited life and requires no maintenance. After pro-
longed use of the electrode, it may become deactivated. An indication is that the
electrode no longer responds correctly to calibration. In this case:
1. Carefully screw off the measuring head.
2. Cautiously remove the precipitated deposits with the aid of filter paper. Do
not use grinding paper or a glass fibre!
3. Rinse several times with distilled water and shake carefully off the water
drops.
4. Take the measuring head, fill it with new electrolyte solution and very slowly
screw it onto the electrode while holding it vertically.
5. Let the electrode rest for a few hours! The electrode is now ready for use
again.
• Replace the membrane only when damaged, not when calibration is no longer
possible!
R361 • R362 • R363