17
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1") below the
fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for
double junction or HI 7071 or HI 8071 3.5M KCl+AgCl Electrolyte
Solution for single junction electrodes.
Unscrew the fill hole screw during measurements.
For AmpHel
®
electrodes:
If the electrode does not respond to pH changes, the battery is dead
and the electrode should be replaced.
MEASUREMENT
Rinse the electrode tip with distilled water. Submerse the tip (3 cm /1¼”)
into 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.
STORAGE PROCEDURE
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.
Replace the solution in the protective cap with a few drops of
HI 70300 or HI 80300 Storage Solution or, in its absence, Fill
Solution (HI 7071 or HI 8071 for single junction and HI 7082 or
HI 8082 for double junction electrodes). Follow the Preparation
Procedure on page 16 before taking measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED
WATER.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable must be intact and
well connected. No cracks should be seen 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.
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071
for single junction or HI 7082 or HI 8082 for double junction
electrodes). Allow the electrode to stand upright for 1 hour.
Follow the Storage Procedure above.
To Next Page
Loading...
