Hanna Instruments HI 9124 - Manual (Page 20)

20
For refillable electrodes, if the refill solution (electrolyte) is more than 2½
cm (1”) below the fill hole, add the appropriate Electrolyte Solution.
MEASUREMENT
Rinse the electrode tip with distilled water, submerse it 3 cm (1¼”) in
the sample and stir gently for a few seconds.
For a faster response and to avoid cross contamination of the samples,
rinse the electrode tip with the solution to be tested, before taking
any measurements.
STORAGE PROCEDURE
To minimize clogging and ensure a quick response time, the glass
bulb and the junction should always be kept moist.
When not in use, store it with a few drops of HI 70300 storage
solution in the protective cap.
NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED
WATER.
PERIODIC MAINTENANCE
Inspect electrode and cable. The cable must be intact. No cracks
should be seen on the electrode stem or bulb. If any scratches or
cracks are present, replace the electrode. Rinse off any salt deposits
with water.
Connectors must be perfectly clean and dry.
For refillable electrodes:
Refill the electrode with fresh electrolyte (see the electrode’s specifications
to select the correct refilling solution). Allow the electrode to stand
upright for 1 hour. Follow the Storage Procedure above.
For nonrefillable electrodes:
Do not be concerned if crystals form in the gel. This will not effect pH
electrode response.
CLEANING PROCEDURE
• General
Soak in Hanna HI 7061 General Cleaning
Solution for approximately ½ hour.
• Protein Soak in Hanna HI 7073 Protein Cleaning
Solution for 15 min.
• Inorganic Soak in Hanna HI 7074 Inorganic
CleaningSolution for 15 min.
• Oil/grease Rinse with Hanna HI 7077 Oil & Fat Cleaning
Solution for 1 min.
IMPORTANT: After performing any of the cleaning procedures, rinse
the electrode thoroughly with distilled water and soak it in HI 70300
Storage Solution for at least 1 hour before taking measurements.