Milwaukee

USER MANUAL

PORTABLE pH METER

MODEL: MW101

Smart pH Meter

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 charge.

Note: We reserve the right to modify the design, construction and appearance of our products without advance notice.

Milwaukee

OPERATION:

The meter is supplied complete with a 9V battery. Slide off the battery compartment cover on the back of the meter. Install the battery into the 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 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 temperature knob

to the value of testing solution (measured with help of an accurate thermometer).

• Immerse the tip (2.5 cm) of the pH electrode into the sample and stir gently.

• After completing measurements, switch the meter off and store the electrode with a few drops of storage solution (MA9015) in the protective cap.

CALIBRATION PROCEDURE:

A)Preparation:

Two calibration buffers are required

1.pH 7.01 (MA9007)

2.pH 4.01 (MA9004) if you are measuring in acid range (pH 0 - pH 7) or pH 10.01 (MA9010) if you are measuring in alkaline range (pH 7 - pH 14).

Use two beakers for each pH buffer. 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 pH 7.01 solution, then immerse the pH electrode into a pH 7.01 buffer solution.

• Take the temperature of the buffer solution with a thermometer and set the temperature knob to the measured temperature (e.g. 15ºC).

Adjust the OFFSET trimmer (pH 7) on the front panel, with a small screwdriver until the

LCD shows the pH value at temperature of the buffer (see the pH versus temperature chart).

E.g. in this case, if the temperature is 15ºC, the meter display should be adjusted to read “pH 7.04”.

• Now rinse the pH electrode in the first pH 4.01 beaker, then immerse it into the second pH 4.01 beaker or follow the same procedure if using pH 10.01 buffer.

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Milwaukee MW101 warranty Operation, Calibration Procedure