user manual

USER MANUAL
PORTABLE pH/EC/TDS METER
MODEL: MW801, MW802
Smart Combined 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 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.
PRELIMINARY EXAMINATION
Remove the instrument from the packing material
and examine it carefully to make sure that no
damage has occurred during shipment. If noticeable
damage is found, notify your Dealer.
Each meter is supplied complete with:
• MA850DIN preamplified non refillable double
junction combination pH electrode with built
in EC/TDS probe and temperature sensor;
1m (3.3') cable.
• pH7.01, 1413 µS/cm & 1382 ppm (for MW801)
or 1500 ppm (for MW802) solutions, 20 mL
each.
• Instruction Manual.
• 1 x 9V battery.
OPERATION
Slide the battery compartment cover located on
the back of the meter off, and install the battery
into the battery clip connector while observing
polarity.
Connect the probe to the meter
securely by aligning the pins
with the socket and pushing
the plug in.
Always remove the electrode
protective cap before use.
Make sure that the meter has
been calibrated before taking
any measurements (see
calibration procedure).
Turn the instrument on by pressing the ON/OFF key.
pH MEASUREMENTS
If the electrode has been left dry, soak the tip in
a pH7 (M10007) buffer solution for a few minutes
to reactivate it.
Submerge the tip of the electrode into the sample
to be measured, select the pH mode and allow
the reading to stabilize before taking measurements.
EC/TDS MEASUREMENTS
Immerse the tip of the electrode into the sample
to be tested.
Select the measurement range (EC or TDS)
and wait for the temperature sensor to reach
thermal equilibrium with the samples before
taking measurements.
AFTER MEASUREMENTS the instrument should
be switched off and the probe cleaned and stored
with a few drops of storage solution in the
protective cap.
CALIBRATION PROCEDURE:
Remove the protective cap from the electrode.
Switch the meter on.
Select the range pressing the appropriate key for
pH, EC or TDS.
pH Calibration
A) PREPARATION
Single point manual calibration. Choose buffer.
If you are going to measure samples near pH 7
use pH 7.01 buffer solution (M10007B) for calibration;
use pH 4.01 buffer solution
(M10004B) for acidic
measurements, or pH 10.01
(M10010B) for alkaline
measurements.
B) PROCEDURE
Rinse the tip of the electrode and immerse it in
the calibration solution. Wait a couple of minutes
for the reading to stabilize.
Measure the temperature of the
buffer solution with a thermometer.
Adjust the calibration knob until the
LCD shows the pH value of the
buffer at the measured temperature
(see pH versus temperature chart).
The calibration is now complete and the meter is
ready for use.
Milwauke
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Milwauke
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