USER MANUAL
MW803 • MW804
Pocket-size
pH/EC/TDS/Temperature
Meters
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
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
•
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.
