Milwaukee MW102 - Operation and Maintenance; Error Message Display; Calibration Procedure; Battery Replacement

OPERATION
y The meter is supplied complete with a 9V battery.
Slide o the battery compartment cover on the back
of the meter and install the battery into battery clip
connector while observing polarity.
y 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.
y 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.
y Turn the instrument on by pressing the ON/OFF key.
y Before taking any measurements, make sure that the
meter has already been calibrated.
y Immerse the tip (2.5 cm) of the
pHelectrode into the sample and
stir gently.
y The pH measurement is ready when
the hourglass symbol turns o.
y To display the measured temper-
ature, press and hold the °Ckey.
When the key is released,
the display will return to the
pHreading.
y 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.
y After completing mea surements,
switch the meter o and store
the elec trode with a few drops
of storage solution in the
protective cap.
Error message on display:
y Blinking full scale value: reading is out of range;
y “Eb”: battery low voltage indication;
y “Ec”: wrong buer solution;
y “Ec” together with “ °C ” blinking: the temperature of
the calibration is out of accepted range.
y “Clr”: the calibration data have been lost and
recalibration is needed.
CALIBRATION PROCEDURE
A) Preparation:
Select two pH calibration buers: 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:
Oset calibration
y 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 buer solution.
y Press the CAL key to enter the
Calibration mode.
y The display flashes “pH 7.01” and
the hourglass lights up.
y Wait till the hourglass symbol
on the display turns o and the
“pH”tag stops blinking, then press
the CFM key to confirm the oset
calibration.
Note: Pressing the CAL key again will change the
buer value, allowing a single point calibration at
pH4.01 or pH10.01.
Slope calibration
y After completing the pH 7.01
calibration the next buer pH 4.01
will flash on the display.
y Press CAL key to display pH 10.01 if desired.
y Rinse the pH electrode and the
temperature probe in the rinse
buer beaker, then immerse them
into the second buer beaker.
y Wait till the hourglass symbol on the LCD turns
o, then press the CFM key to confirm the slope
calibration.
Notes: To exit the calibration mode, turn the meter o
by pressing the ON/OFF key.
To perform a single point calibration (oset) at
pH7.01, press the ON/OFF key when the second buer
is displayed.
BATTERY REPLACEMENT
When the batteries become weak, the battery symbol
on the LCD starts blinking to advise that only a few
hours of working time is remaining.
The meter is also provided with BEPS (Battery Error
Prevention System), which avoids any erroneous
reading due to low battery level. The instrument will
display “Eb” for a while and then turn o.
Prompt battery replacement is required.
Battery replacement must only take place in a non-
hazardous area using a 9V alkaline battery.
Turn the meter o, slide the
battery compartment cover
located at the rear of the
meter o and replace the
9V battery with a new one.
Make sure the battery
contacts are fully engaged
in the connector, seat the
battery in its compartment
and replace the cover .