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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.
Connect the probe to the meter securely by
aligning the pins with the plug in.
Make sure that the meter has been
calibrated before taking any measurements
(see Calibration Procedure).
Immerse the tip (4 cm) of the EC/TDS probe
into the sample. If possible use plastic
beakers or containers to minimize any EMC
interference.
Turn the instrument on by pressing the
ON/OFF key.
Wait for the temperature sensor to reach
the thermal equilibrium before taking any
measurements.
After use, the instrument should be
switched off and the probe should be
cleaned and dried. Whenever needed, use
alcohol for better cleaning.
CALIBRATION PROCEDURE
Clean the probe with alcohol and let it dry.
Open a sachet of conductivity calibration
solution (see Specifications) and immerse
the probe making sure that the metal pins
are completely submerged.
Wait until the thermal equilibrium is
reached and the reading is stable.
Adjust the calibration trimmer on the front
panel of the instrument with the supplied
screwdriver until the display shows:
"1413 µS" for MW301
"1.4 mS" for MW302
"1382 mg/L" (ppm) for MW401
"6.4 g/L" (ppt) for MW402
The calibration is now complete and the
meter is ready for use.
The instrument should be re-calibrated at
least once a month, or whenever the probe or
battery is changed.
SPECIFICATIONS
RANGE/RESOLUTION
µ
MW301
0 to 1990
S/cm / 1
MW302
0.0 to 10.0 mS/cm / 0.1 mS/cm
MW401
0 to 1990 mg/L (ppm) / 1 mg/L
MW402
0.0 to 10.0 g/L (ppt) / 0.1 g/L
ACCURACY
±2% Full Scale
(@ 25°C)
CONVERSION FACTOR
MW401
0.5
MW402
0.5
CALIBRATION SOLUTIONS
MW301 &
µ
1413
S/cm = 1.41 mS/cm
MW302
(M10031B)
MW401
1382 mg/L (M10032B)
MW402
6.4 g/L (M10038B)
CONDUCTIVITY PROBE
MW301 &
SE510 (included)
MW401
MW302 &
SE520 (included)
MW402
TEMP.
Automatic, from 5 to 50 °C
COMPENSATION
ENVIRONMENT 0 to 50 °C, 95% RH max.
BATTERY TYPE
1 x 9V alkaline (included)
BATTERY LIFE
approximately 300 hours of use
DIMENSIONS
143 x 80 x 32 mm
WEIGHT
220 g (with battery) meter only
µ
S/cm
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