Milwaukee Portable Meter User Manual
- June 7, 2024
- Milwaukee
Table of Contents
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
charge.
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 nonrefillable 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 plugin. 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.
EC/TDS calibration :
A) PREPARATION
Single point EC calibration. Choose appropriate standard: Model MW801: use
1382 ppm (M10032B) for TDS or 1.413 µS/cm (M10031B) for EC calibration. Model
MW802: use 1500 ppm (M10442B) for TDS or 1.413 mS/cm (M10031B) for EC
calibration.
B)
PROCEDURE
Immerse the tip of the electrode in the standard solution. Wait for the
reading to stabilize, and thermal equilibrium be reached. Turn the EC/TDS
calibration knob until the display shows the EC or TDS reading at 25°C. The
calibration is now complete and the meter is ready for use. The instrument
should be re-calibrated at least once a month, or when the probe or battery is
replaced.
Note : The conversion between EC and TDS is made by a built-in circuit.
If calibration is made in EC range, TDS range is automatically calibrated (or
vice versa).
BATTERY REPLACEMENT:
The meters are powered by a 9V battery that is in a compartment located in the
rear of the instrument.
When the battery becomes weak, the instrument automatically switches off.
Replacement must only take place in a non-hazardous area using an alkaline 9V
battery. Slide off the battery compartment cover and replace the old battery
with a new one. Make sure that the battery contacts are fully engaged in the
connector. Seat the battery in is compartment and replace the cover.
pH VERSUS TEMPERATURE CHART
| TEMP | pH VALUES |
|---|---|
| °C | °F |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 40 | 104 |
| 45 | 113 |
| 50 | 122 |
| 55 | 131 |
| 60 | 140 |
| 65 | 149 |
| 70 | 158 |
OPTIONAL ACCESSORIES
M10007B
pH7.01 buffer solution,
25×20 mL sachet
M10004B
pH4.01 buffer solution,
25×20 mL sachet
M10010B
pH10.01 buffer solution,
25×20 mL sachet
M10031B
1413 µS/cm calibration
solution, 25×20 mL sachet
M10032B
1382 ppm calibration
solution, 25×20 mL sachet
M10442B
1500 ppm calibration
solution, 25×20 mL sachet
MA9015
Electrode storage
the solution, 220 mL bottle
MA850DIN
pH/EC/TDS spare probe
with 1m cable
SPECIFICATIONS:
MW801 MW802
RANGE 0.0 to 14.0 pH 0.00 to 14.00 pH
0 to 1990 ppm 0 to 4000 ppm
0 to 1990 µS/cm 0.00 to 6.00 mS/cm
RESOLUTION 0.1 pH 0.10 pH
10 ppm 10 ppm
10 µS/cm 0.01 mS/cm
ACCURACY ± 0.2 pH ±0.20 pH
(@ 20ºC) ±2% Full scale ±2% Full scale
CALIBRATION M10007B (pH 7.01)
SOLUTIONS M10031B (1.413 mS/cm)
M10032B (1382ppm) M10442B (1500ppm)
CONVERSION 0.5 0.68
FACTOR
CALIBRATION Manual, at 1 point
TEMPERATURE COMPENSATION Automatic from 0 to 50ºC
PROBE MA850DIN combination pH/EC/TDS probe
ENVIRONMENT 0 to 50ºC, 95%RH max
BATTERY LIFE /TYPE 1x9V alkaline
approx. 150 hours of use
DIMENSIONS 143 x 80 x 32 mm
WEIGHT 220 g (with battery)
ISTMW802 01/10
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