OPERATION
y
Connect the supplied 12VDC power adapter to the
meter and to the mains line.
y
Connect the pH-electrode to the BNC socket on the
bottom of the meter.
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
M10000B
rinse solution for a few minutes to reactivate it.
y
Make sure that the meter has been calibrated
before taking any measurements (see Calibration
Procedure).
y
Immerse the tip (2.5 cm) of the pH-electrode into
the sample.
y
Turn the instrument on by pressing the ON/OFF key.
y
Allow the reading to stabilize and the meter will
start continuous monitoring.
y
A blinking alarm will indicate when the measured
pH value is higher or lower than selected setpoint,
depending on user selection.
Note:
The output power contact (MC122 only) has no
protection fuse inside the meter. It is recommended to
protected it outside, against failure.
SETPOINT
y
The setpoint can be selected by adjusting the
central front knob to the desired value.
y
The selectable range is from 3.5 to 7.5 pH for
MC110
;
from 5.5 to 9.5 pH for
MC120
and
MC122
.
y
The nature of the setpoint can be selected by
setting the switch to the desired position (ABOVE
or BELOW).
CALIBRATION PROCEDURE
y
Remove the protective cap from the electrode.
y
Immerse the electrode tip into a new sachet of
pH 7 calibration solution and allow the reading to
stabilize.
y
Adjust the pH7 calibration trimmer (on the front) to
display “7.0 pH”.
y
Open a new sachet of pH 4 calibration solution and
use a small quantity to rinse the electrode.
y
Immerse the electrode tip into the pH 4 sachet and
allow the reading to stabilize.
y
Adjust the pH4/10 calibration trimmer (on the front)
to display “4.0 pH”.
y
The calibration is now complete and the meter is
ready to take measurements.
y
It is suggested to recalibrate the meter at least once
a month, after a prolonged stocking time and after
pH-electrode replacement.
INSTALLATION PROCEDURE
(for MC122 only)
