38
MEASUREMENT
Verify if electrode is calibrated before making measurements. Rinse the
pH electrode tip with distilled water. Submerse the tip (bottom 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 a few drops of the solution to be tested, before
taking measurements.
See if the ORP probes tip is completly submersed.
STORAGE PROCEDURE
To minimize clogging and assure a quick response time, the glass bulb and the
junction of pH electrode 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 or, in its absence, with pH 4 buffer.
Follow the Preparation Procedure on page 37 before taking measurements.
Note:
NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. 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 off any salt deposits with water.
