16 17
For refillable electrodes:For refillable electrodes:
For refillable electrodes:For refillable electrodes:
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 AmpHelFor AmpHel
For AmpHelFor AmpHel
For AmpHel
®®
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electrodes: electrodes:
electrodes: electrodes:
electrodes:
If the electrode does not respond to pH changes, the battery is dead
and the electrode should be replaced.
MEASUREMENTMEASUREMENT
MEASUREMENTMEASUREMENT
MEASUREMENT
Rinse the electrode tip with distilled water. Immerse the tip (bottom
4 cm /1½”) 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 STORAGE
STORAGE STORAGE
STORAGE
PROCEDUREPROCEDURE
PROCEDUREPROCEDURE
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 MAINTENANCEPERIODIC MAINTENANCE
PERIODIC MAINTENANCEPERIODIC MAINTENANCE
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:For refillable electrodes:
For refillable electrodes:For refillable electrodes:
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.
ELECTRODE CONDITIONING &ELECTRODE CONDITIONING &
ELECTRODE CONDITIONING &ELECTRODE CONDITIONING &
ELECTRODE CONDITIONING &
MAINTENANCEMAINTENANCE
MAINTENANCEMAINTENANCE
MAINTENANCE
PREPARATION PROCEDUREPREPARATION PROCEDURE
PREPARATION PROCEDUREPREPARATION PROCEDURE
PREPARATION PROCEDURE
Remove the protective cap of the pH electrode.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal
with electrodes. They will disappear when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb
affecting proper functioning of the electrode. These bubbles can be
removed by “shaking down” the electrode as you would do with a
glass thermometer.
If the bulb and/or junction is dry, soak the electrode in HI 70300 or
HI 80300
Storage Solution for at least one hour.
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