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ELECTRODE CONDITIONING AND MAINTENANCE
PREPARATION
TEST MEASUREMENT
STORAGE
106
Remove the electrode protective cap .
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRES-
ENT .
This is normal with electrodes and they will disappear when
rinsed with water .
During transport tiny bubbles of air may have formed in-
side the glass bulb . The electrode cannot function properly
under these conditions . These bubbles can be removed by
"shaking down" the electrode as you would do with a glass
thermometer .
If the bulb and/or junction are dry, soak the electrode in
HI70300 Storage Solution for at least one hour .
If the electrode does not respond to pH changes, the battery
may be run down and should be replaced .
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 .
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, HI7082 KCl 3 .5M Solution .
Follow the Preparation Procedure above before taking
measurements .
Note
NEVER STORE THE ELECTRODE IN DISTILLED OR DEION-
IZED WATER .
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