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OPERATIONAL GUIDE CE DECLARATION OF CONFORMITY
• The meter is supplied complete with a 9V battery. Remove the
battery compartment cover on the back of the meter, install
the battery while paying attention to its polarity.
• Always remove the electrode protective cap before taking any
measurements. If the electrode has been left dry, soak the tip
in HI 70300 storage solution for half an hour to reactivate it.
• Connect the pH electrode to the screw type connector on the
meter. Be sure that the electrode and the meter connec-
tions are clean and dry to ensure a positive contact. Turn
the meter on by pressing ON/OFF.
• The LCD will show all the used segments for a few seconds and
then enters the normal measurement mode.
• Submerge the probe tip (at least 4cm/
1½") into the sample to be tested.
• To take pH measurements press the
SET/HOLD button to select the pH range.
Stir briefly and wait for the reading to
stabilize.
• The display will show the pH value automatically compensated
for temperature variations.
Note: In order to take accurate pH measurements, make sure
the instrument has been calibrated before use.
Note: If measurements are taken in different samples succes-
sively, it is recommended to rinse the electrode thoroughly
to avoid cross-contamination. After cleaning, rinse the
electrode with some of the sample to be measured.
• To take temperature measurements press the SET/HOLD
button to select the temperature mode. Stir briefly and wait
for the reading to stabilize.
• To freeze the display, while in measurement mode, press and
hold the SET/HOLD button until the HOLD tag lights up. The
reading will be frozen on the LCD.
Press the SET/HOLD button again to return to normal mode.
• Connect the electrode and switch the meter ON.
• Enter the calibration mode by pressing the CAL button. The
pH tag starts blinking on the LCD.
• For a single-point calibration, place the electrode in any
buffer, eg. pH 4.01, 7.01 or 10.01. The meter will automati-
cally recognize and display the buffer value.
• When the pH tag stops blinking, press the SET/HOLD button
to confirm the calibration point.
Note: If the pH 7.01 buffer was used, press the SET/HOLD
button again to exit the Calibration mode; the first
calibration point is stored and the meter returns to the
measurement mode. Otherwise, if a different buffer was
used, the meter will automatically return to normal mode.
• For a two-point calibration, place the electrode in pH 7.01
buffer. The meter will automatically recognize and display the
buffer value.
• When the pH tag stops blinking, press the SET/HOLD button
to confirm and store the first calibration point.
• The meter will then ask for the second buffer. Place the
electrode in pH 4.01 (or pH 10.01) buffer.
• When also this buffer is recognized (the pH tag stops blinking),
press the SET/HOLD button to confirm and store the second
calibration point; the meter will return to normal mode.
Note: If a solution with wrong pH value
is used as buffer for calibration,
the LCD will display the “Ec” mes-
sage.
Note: To exit the Calibration mode, press the CAL button at any
time. The meter will display dashes and then return to
normal mode.
Note: To reset to the default values, after entering the
Calibration mode and before the first calibration point is
confirmed (pH tag is blinking), press and hold the SET/
HOLD key, and then press the CAL button.
The meter displays “CLr” for a few
seconds and then return to nor-
mal mode.
Note: For better accuracy it is recommended to carry out a 2-
point calibration procedure.
pH CALIBRATION
Recommendations for Users
Before using this product, make sure that it is entirely suitable for the environment in which
they are used.
Operation of this instrument in residential area could cause unacceptable interferences to
radio and TV equipments, requiring the operator to take all necessary steps to correct
interferences.
The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching
this glass bulb at all time. During calibration of instruments, ESD wrist straps should be worn to
avoid possible damage to the electrode by electrostatic discharge.
Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC
performance.
To avoid electrical shock, do not use these instruments 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.
Note: After use, rinse the electrode with water to minimize
contamination and store it with a few drops of storage (HI
70300) or pH7 (HI 7007) solution in the protective cap.
NEVER USE DISTILLED OR DEIONIZED WATER FOR STOR-
AGE PURPOSES.
Note: Always turn the meter OFF and replace the electrode
protective cap after use.
BATTERY REPLACEMENT
When the battery becomes weak, the
battery symbol on the LCD will light up
and, at startup, the meter displays the
“Eb” message for a few seconds.
When the low battery indicator appears, only a few hours of
battery life is remaining. It is recommended to replace the
battery immediately.
The meter is also provided with BEPS (Battery Error Prevent-
ing System), which avoids any erroneous reading due to low
battery level by warning the user with the “Eb” message on
the LCD and switching the meter off when the battery is
completely rundown.
Remove the cover on the back of the
meter and replace the battery with a
new one, while paying attention to its
polarity.
Replacement must only take place in a
nonhazardous area using an alkaline
9V battery.