52
cannot function properly under these condi-
tions. 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.
For refillable electrodes:
If the fill solution (electrolyte) is more than
1 cm (½") below the fill hole, add HI7082
3,5M KCl Electrolyte Solution for double
junction or HI7071 3,5M KCl+AgCl Electro-
lyte Solution for single junction electrodes.
For a faster response unscrew the fill hole
screw during measurements.
For AmpHel
®
electrodes:
If the electrode does not respond to pH
changes, the battery is run down and the
electrode should be replaced.
MEASUREMENT
Rinse the electrode tip with distilled water.
Immerse the tip (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 elec-
trode tip with a few drops of the solution to be
tested, before taking measurements.
STORAGE
To minimize clogging and assure a quick
response time, the glass bulb and the junc-
tion should be kept moist and not allowed to
dry out.
Replace the solution in the protective cap
with a few drops of HI70300 Storage Solu-
tion or, in its absence, Filling Solution
(HI7071 for single junction or HI7082 for double
junction electrodes).
AmpHel
®
is a registered Trademark of "Hanna Instruments"
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