Hanna Instruments ph 300 Manual Do Utilizador
87
86
ing down" the electrode as you would do with
a glass thermometer.
a glass thermometer.
If the bulb and/or junction are dry, soak the
electrode in HI70300 or HI 80300 Storage
Solution for at least one hour.
electrode in HI70300 or HI 80300 Storage
Solution for at least one hour.
For refillable electrodes:
If the filling solution (electrolyte) is more
than 1 cm (½") 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.
than 1 cm (½") 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.
For a faster response, unscrew the fill hole
screw during measurements.
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.
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 at least 30 seconds.
and stir gently for at least 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.
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.
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 HI 70300 or HI 80300
Storage Solution or, in its absence, Filling
Solution (HI 7071 or HI 8071 for single junc-
tion or HI 7082 or HI 8082 for double junction
with a few drops of HI 70300 or HI 80300
Storage Solution or, in its absence, Filling
Solution (HI 7071 or HI 8071 for single junc-
tion or HI 7082 or HI 8082 for double junction
AmpHel
®
is registered Trademark of "Hanna Instruments"
ELECTRODE CONDITIONING
AND MAINTENANCE
PREPARATION
Remove the protective cap.
DO NOT BE ALARMED IF ANY SALT DE-
POSITS ARE PRESENT.
POSITS ARE PRESENT.
This is normal with electrodes and they will
disappear when rinsed with water.
disappear when rinsed with water.
During transport tiny bubbles of air may have
formed inside the glass bulb. The electrode
cannot function properly under these condi-
tions. The bubbles can be removed by "shak-
formed inside the glass bulb. The electrode
cannot function properly under these condi-
tions. The bubbles can be removed by "shak-
Reference
Filling Hole
Filling Hole
Reference
Filling Hole
Filling Hole
Fill Hole
Screw
Screw
Sensitive
Wire
Reference
Wire
Reference
Junction
Glass
Bulb
Glass
Bulb
Bulb
Reference
Junction
Junction
Reference
Junction
Junction
Reference
Junction
Platinum or
Gold tip
Gold tip
Platinum or
Gold tip
Reference
Wire
Wire
Reference
Wire
Wire
Sensitive
Wire
Wire
Glass Body
pH Electrode
Plastic Body
pH Electrode
Plastic Body
ORP Electrode
Glass Body
ORP Electrode
Reference
Wire