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If the bulb and/or junction are dry, soak the electrode in
HI70300 storage solution
for at least one hour.
For refillable electrodes**: If the refill solution (electrolyte) is more than 2½ cm (1”)
below the fill hole, add
HI7082
3.5M KCl Electrolyte
Solution for double junction or
HI7071
3.5M KCl+AgCl
electrolyte solution for single junction electrodes.
For AmpHel
®
electrodes: If the electrode does not respond to pH changes, the battery
is run down and the electrode should be replaced.
TEST MEASUREMENT
Rinse the electrode tip with distilled water.
Immerse the tip (bottom 4 cm / 1½”) in the sample and stir
gently for approx. 30 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 your measurements.
STORAGE
To minimize clogging and assure a quick response time, the
glass bulb and the junction should be kept moist and not
allowed to dry out. This can be achieved by installing the
electrode in such a way that it is constantly in a well filled
with the sample (stream or tank).
When not in use, replace the solution in the protective cap
with a few drops of
HI70300
storage solution or, in its
absence,
HI7007
pH7.01 buffer solution.
Follow the Preparation Procedure above before taking
measurements.
Note
NEVER STORE THE ELECTRODE IN DISTILLED OR DEION-
IZED WATER.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable used for the
connection to the controller 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.
