• The secondary LCD displays "ESC" for 1 se-
cond and then the meter returns to the normal
measurement mode.
• To reset to the default values and clear a
previous calibration, press the SET/HOLD
button after entering the calibration mode
and before the first point is accepted.
• The secondary LCD displays "CLR" for 1
second, the meter resets to the default calib-
ration and the CAL tag on the LCD turns off.
• If a valid buffer value is detected, the REC
message is displayed and the meter comp-
letes the calibration procedure.
• The LCD shows the accepted value with the
"OK 2" message and the instrument returns
to the normal measurement mode. Other-
wise, if no valid buffer is detected, the meter
displays the WRNG message.
PROBE REPLACEMENT
• Remove the protective cap and unscrew the
plastic ring on the top of the probe.
• Pull out the MI60P probe and replace it with
a new one.
• Make sure the gaskets are in place before
screwing back the ring.
BATTERY REPLACEMENT
When the batteries become weak, the battery
symbol on the LCD will light up to advise that
only a few hours of working time is remaining.
The meter is also provided with BEPS (Battery
Error Prevention System), which avoids any
erroneous readings due to low battery level
by automatically switching the meter off. It is
recommended to replace the batteries imme-
diately.
To replace the batteries unscrew the battery
compartment cap and replace all four 1.5V bat-
teries while paying attention to their polarity.
Make sure the gasket is in place before scre-
wing back the cap. Batteries should only be
replaced in a safe area using the battery type
specified in this instruction manual.
ACCESSORIES
MI60P
Replaceable probe for
MW803 & MW804
M10030B 12.88 mS/cm calibration
solution, 20 ml sachet, 25 pcs
M10031B 1413 μS/cm calibration solution,
20 ml sachet, 25 pcs
M10032B 1382 ppm TDS Calibration Solution,
20 ml sachet, 25 pcs.
M10038B 6.44 ppt TDS Calibration,
20 ml sachet, 25 pcs.
MA9060 12.88 mS/cm calibration solution,
230 ml bottle
MA9061 1413 μS/cm calibration solution,
230 ml bottle
MA9062 1382 ppm TDS Calibration
Solution, 230 mL bottle
M10016B Cleaning solution, 20 ml sachet,
25 pcs
M10000B Rinse solution, 20 ml sachet,
25 pcs
M10004B pH 4.01 buffer, 20 ml sachet,
25 pcs.
M10007B pH 7.01 buffer, 20 ml sachet,
25 pcs.
M10010B pH 10.01 buffer, 20 ml sachet,
25 pcs.
MA9004 pH 4.01 buffer, 230 ml bottle
MA9007 pH 7.01 buffer, 230 ml bottle
MA9010 pH 10.01 buffer, 230 ml bottle
MA9006 pH 6.86 buffer, 230 ml bottle
MA9009 pH 9.18 buffer, 230 ml bottle
MA9015 Electrode storage solution, 230 ml
SPECIFICATIONS
Range
0.00 to 14.00 pH
0 to 3999 μS/cm (MW803)
0 to 2000 ppm (MW803)
0.00 to 20.00 mS/cm (MW804)
0.00 to 10.00 ppt (MW804)
0.0 to 50.0 °C / 32.0 to 122.0 °F
Resolution
0.01 pH
1 μS/cm / 1 ppm (MW803)
0.01 mS/cm / 0.01 ppt (MW804)
0.1 °C / 0.1 °F
Accuracy (@25°C)
0.05 pH
2% FS (EC/TDS)
0.5 °C / ±1 °F
TDS Factor
0.45 to 1.00 (CONV)
Temperature Compensation
Automatic, with ß=0.0 to 2.4%/°C
Calibration
Automatic, 1 point for EC and 1 or
2 points for pH
Probe Replaceable MI60P
Environment
0 to 50 °C; 100% RH max.
Battery Type
4 x 1.5V; IEC LR44, A76
Battery Life
Approx. 100 hours of use
Auto-off
After 8 min. of non-use
Dimensions / Weight
200 x dia 38 mm / 100 g
USER MANUAL
MW803 • MW804
Pocket-size
pH/EC/TDS/Temperature
Meters
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