user manual

Milwaukee
Milwaukee
WARRANTY:
This instrument is warranted from all defects in
materials and manufacturing for a period of two
years from the date of purchase.
The electrode is warranted for a period of six
months.
If during this period the repair or replacement of
parts is required, where the damage is not due to
negligence or erroneous operation by the user, please
return the parts to either distributor or our office and
the repair will be effected free of change.
Note: We reserve the right to modify the design,
construction and appearance of our products
without advance notice.
USER MANUAL
PORTABLE uP-BASED
pH METER
MODEL: MW102
Smart pH Meter
OPERATION:
• The meter is supplied complete with a 9V
battery. Slide off the battery compartment
cover on the back of the meter and install
the battery into battery clip connector
while observing polarity.
• Always remove the electrode protective
cap before taking any measurement.
If the electrode has been left dry,
soak the tip (bottom 2.5 cm) in rinse
solution (M10000B) for a few minutes
to reactivate it.
• Connect the pH
electrode and the
temperature
probe to the
sockets on the
meter’s top. The
temperature probe
can be used
independently to
take temperature
measurements,
or it can be used
in conjunction with the pH electrode to
utilize the meter’s ATC capability.
• Turn the instrument on by pressing the
ON/OFF key.
• Before taking any measurements, make
sure that the meter has already been
calibrated.
• Immerse the tip (2.5 cm)
of the pH electrode and
the temperature probe
into the sample and stir
gently.
• The pH measurement is
ready when the hourglass
symbol stops blinking.
• To display the mea-
sured temperature,
press and hold the
°C key.
When the key is released, the display
will return to the pH reading.
• The HOLD function is activated
by pressing the HOLD key. The
measured value is frozen on the
display and the “HOLD” tag lights
up. Release “HOLD” by pressing HOLD
key again.
• After completing measurements,
switch the meter off and store
the electrode with a few drops of
storage solution in the protective
cap.
• Error message on display:
CALIBRATION PROCEDURE:
A) Preparation:
Select two pH calibration buffers: pH 7.01
and a second to bracket your measurement
range.
1. pH 7.01 (MA9007)
2. pH 4.01 (MA9004) for measuring in
the acid range (pH lower than 7) or
pH 10.01 (MA9010) for measuring in
the alkaline range (pH higher than 7).
Use two beakers for each reference solution.
One beaker for rinsing the electrode, the
other for calibration. This way contamination
between solutions during calibration is
minimized.
B) Procedure:
Offset calibration
• Remove the electrode
protective cap and rinse
the tip with some pH 7.01
solution, then immerse
the electrode tip and the
temperature probe into a
pH 7.01 buffer solution.
• Press the CAL key to
enter the Calibration
mode. The display
flashes “pH 7.01”
and the hourglass lights up.
• Blinking full scale value: reading is
over range;
• “Eb”: battery low voltage indication;
• “Ec”: wrong buffer solution;
• “Clr”: the calibration data have been
lost and recalibration is needed.