User Guide

18
do with a glass thermometer.
If the bulb and/or junction are dry, soak the
electrode in HI70300 or HI80300 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 or
HI8082 3,5M KCl Electrolyte Solution for
double junction or HI7071 or HI8071 3,5M
KCl+AgCl Electrolyte Solution for single
junction electrodes. For a faster response
unscrew the fill hole screw during measure-
ments.
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 assuring 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 protec-
tive cap with a few drops of HI70300 or
HI 80300 Storage Solution or, in its ab-
sence, Filling Solution (HI7071 or HI8071
for single junction or HI7082 or HI8082 for
double junction electrodes). Follow the Prepa-
ration Procedure above before taking mea-
surements.
Note: NEVER STORE THE ELECTRODE
IN DISTILLED WATER OR DRY.