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M ilw a u ke e

WARRANTY:

This instrument is warranted from all defects in materi-
als and  manufacturing for a period of two years from
the date of purchase.

The probe 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.

M ilw a u ke e

   USER MANUAL

PORTABLE pH METER

MODEL: SM101

Smart pH Meter

OPERATION:

• The meter is supplied complete with a

9V battery. Slide off the battery compart-
ment 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 measurement. If
the electrode has been left dry, soak the
tip (bottom 2.5 cm) in rinse solution
(M10000B) for a few minutes to reacti-
vate it.

• Connect the pH electrode to

the BNC socket on the top
of the meter.

• Turn the instrument on by

pressing the ON/OFF key.

• Make sure that the meter

has been calibrated before
taking any measurements
(see Calibration Procedure).

• Set the tempera-

ture knob to the
value of testing
solution (mea-
sured with help of
an accurate ther-
mometer).

• Immerse the tip (2.5 cm) of the pH elec-

trode into the sample and stir gently.

• After measurements, switch the

meter off and store the elec-
trode with a few drops of storage
solution in the protective cap.

CALIBRATION PROCEDURE:

A) Preparation:

Two reference solutions are required
1. pH 7.01 (MA 9007)
2.  pH 4.01  (MA 9004) if you are

measur ing in acid range (pH0-pH7)
or  pH 10.01  (MA 9010) if you are
measuring in alkaline range (pH7-
pH14).

Use two beakers for each reference so-
lution. One beaker for rinsing the
electrode, the other for calibration.

Use a thermometer with 1ºC accuracy to
measure the temperature of calibration
solution.

B) Procedure:
• Remove the protective cap

from the electrode. Rinse
the tip of the electrode with
some pH7.01 solution, then
immerse the pH electrode
into a pH7.01 buffer solu-
tion.

• Take the temperature of the

buffer solution with a ther-
mometer and set the
temperature knob to the
measured temperature (e.g.
15ºC).

• Adjust the OFFSET trimmer

(pH 7) on the fron panel,
with a small screwdriver
until the LCD shows the pH
value at the above tempera-
ture (see the pH versus
temperature chart).
E.g. in this case, if the tem-
perature is 15ºC, the meter
display should be adjusted
to read “pH 7.04”.

• Now rinse the pH electrode

in the first pH4.01 beaker,
then immerse it into the
second pH4.01 beaker.

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