Hanna Instruments HI 981401N - Manual (Page 2)

Always replace the protective cap after use.
DO NOT USE DISTILLED OR DEIONIZED WATER FOR
STORAGE PURPOSES.
• If the electrode has been left dry, soak the tip in a
storage (HI 70300) or pH7 (HI 7007) solution for at
least one hour to reactivate it.
• To minimize clogging and provide longer life for the pH
electrode, it is recommended to clean it monthly.
Immerse the tip of the electrode in HI 7061 for one
hour, then rinse it with tap water.
TAKING pH MEASUREMENTS
• Turn the meter on by connecting the 12 Vdc power
adapter to the meter and to the mains.
• In addition, the meter is supplied
with a differential input and
HI 1283 stainless steel probe to
prevent potential grounding prob-
lems. Remove the protective cap
from the pH electrode and immerse
the tips (4 cm/1½”) of both pH
electrode and grounding probe into
the sample.
• The LCD will show the pH value. Allow
the reading to stabilize and the meter
will start continuous monitoring.
Note: To prolong the electrode life, after switching the meter
off, remove the electrode from the solution.
For the greatest accuracy, frequent calibration of the instru-
ment is recommended. In addition, the instrument must be
recalibrated whenever:
a) The pH electrode is replaced
b) After testing aggressive chemicals
c) Extreme accuracy is required
d) At least once a month
PREPARATION
Pour small quantities of pH 7.01 (HI 7007) and pH 4.01
(HI 7004) solution into two clean beakers.
For accurate calibration use two beakers for each buffer
solution, the first one for rinsing the tip of the electrode and
the second one for calibration.
As second point for calibration, pH 4.01 buffer (HI 7004) is
recommended for measuring acidic samples, while pH 10.01
(HI 7010) should be used if the samples to be tested are
alkaline.
CALIBRATION PROCEDURE
• Remove the protective cap from the
electrode, rinse and immerse it in
pH 7.01 buffer solution together
with the grounding probe. Stir gen-
tly and wait a couple of minutes for
the reading to stabilize.
Note: the electrode should be sub-
merged approximately 4 cm
(1½”) in the solution.
CALIBRATION
• With the supplied screwdriver,
adjust the “pH 7” calibration
trimmer until the display shows
“7.0” pH.
• Rinse and immerse pH electrode and grounding probe in
pH 4.01 (or pH 10.01) buffer solution.
• Stir gently, wait a couple of
minutes and adjust the “pH
4” trimmer until the LCD
shows “4.0” pH (or “10.0”
pH).
The calibration is now complete.
4 cm (1½")
CE DECLARATION OF CONFORMITY
Recommendations for Users
Before using this product, make sure that it is entirely suitable for the environment in
which it is used. Operation of this instrument in residential areas could cause unaccept-
able interferences to radio and TV equipment.
The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching
this glass bulb at all times. During operation, ESD wrist straps should be worn to avoid possible
damage to the electrode by electrostatic discharges.
Any variation introduced by the user to the supplied equipment may degrade the instrument’s
EMC performance. To avoid electrical shock, do not use this instrument when voltages at the
measurement surface exceed 24 Vac or 60 Vdc.
To avoid damages or burns, do not perform any measurement in microwave ovens.
ACCESSORIES
HI 1283 * Stainless steel grounding probe with 2 m
(6.6’) cable
HI 1286 Double junction, plastic body pH electrode
with 2 m (6.6’) cable and BNC connector
HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs)
HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs)
HI 70010P pH 10.01 solution, 20 mL sachet (25 pcs)
HI 7004L pH 4.01 solution, 500 mL bottle
HI 7007L pH 7.01 solution, 500 mL bottle
HI 7010L pH 10.01 solution, 500 mL bottle
HI 70300L Electrode storage solution, 500 mL bottle
HI 7061L Electrode cleaning solution, 500 mL bottle
HI 710005 12 Vdc power adapter, US plug
HI 710006 12 Vdc power adapter, European plug
* To be replaced by authorized technical personnel only.
IST981401NR2 05/05
HI 7007
RINSE
HI 7007
CALIBRATION