Milwaukee MW180 MAX User manual

INSTRUCTION MANUAL
SATISFACTION
GUARANTEED
MW180 MAX
pH/mV/EC/ TDS /NaCl/Temperature
Bench Meter

All rights are reserved. Reproduction in whole or in part is prohibited without the written
consent of the copyright owner, Milwaukee Instruments Inc., Rocky Mount, NC 27804 USA.
THANK YOU for choosing Milwaukee Instruments!
This instruction manual will provide you the necessary information for correct use
of the meter.

3
TABLE OF CONTENTS
1. PRELIMINARY EXAMINATION ...................................................................................................................................5
2. INSTRUMENT OVERVIEW ..........................................................................................................................................5
3. SPECIFICATIONS.............................................................................................................................................................6
4. FUNCTIONAL & DISPLAY DESCRIPTION............................................................................................................8
5. PROBE DESCRIPTION.................................................................................................................................................. 11
6. GENERAL OPERATIONS.............................................................................................................................................14
6.1. POWER CONNECTION & BATTERY MANAGEMENT..........................................................................14
6.2. MOUNTING THE ELECTRODE HOLDER ..................................................................................................14
6.3. CONNECTING THE PROBES.........................................................................................................................14
6.4. ELECTRODE CARE & MAINTENANCE......................................................................................................15
7. SETUP..................................................................................................................................................................................18
7.1. MEASUREMENT MODES ..................................................................................................................................18
7.2. GENERAL SETUP OPTIONS............................................................................................................................19
7.3. pH MODE SETUP OPTIONS...........................................................................................................................23
7.4. EC MODE SETUP OPTIONS...........................................................................................................................25
8. pH ........................................................................................................................................................................................29
8.1. PREPARATION......................................................................................................................................................29
8.2. CALIBRATION......................................................................................................................................................29
8.3. MEASUREMENT ................................................................................................................................................32
8.4. WARNINGS & MESSAGES............................................................................................................................33
9. ORP ..................................................................................................................................................................................... 37
9.1. PREPARATION...................................................................................................................................................... 37
9.2. MEASUREMENT................................................................................................................................................. 37
10. EC / TDS..........................................................................................................................................................................38
10.1. PREPARATION....................................................................................................................................................38
10.2. CALIBRATION....................................................................................................................................................38
10.3. MEASUREMENT...............................................................................................................................................40
10.4. WARNINGS & MESSAGES..........................................................................................................................42

4MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
11. SALINITY..........................................................................................................................................................................44
11.1. PREPARATION .....................................................................................................................................................44
11.2. CALIBRATION .....................................................................................................................................................44
11.3. MEASUREMENT................................................................................................................................................45
11.4. WARNINGS & MESSAGES........................................................................................................................... 47
12. LOGGING.........................................................................................................................................................................49
12.1. TYPES OF LOGGING........................................................................................................................................50
12.2. DATA MANAGEMENT.....................................................................................................................................52
13. GLP....................................................................................................................................................................................59
14. TROUBLESHOOTING.................................................................................................................................................60
15. ACCESSORIES...............................................................................................................................................................61
CERTIFICATION..................................................................................................................................................................62
RECOMMENDATION........................................................................................................................................................62
WARRANTY..........................................................................................................................................................................62

INSTRUMENT OVERVIEW 5
1. PRELIMINARY EXAMINATION
Each bench meter is delivered in a cardboard box and is supplied with:
yMAB/1 Double junction refillable pH electrode
yMADB/1 – 4-ring EC/TDS/NaCl/Temperature probe
yMARStainless steel temperature probe
yM pH 4.01 buer solution (sachet)
yM pH 7.01 buer solution (sachet)
yM pH 10.01 buer solution (sachet)
yM Electrode cleaning solution (sachet)
yMA Electrode holder
yGraduated pipette
y12 VDC adapter
yUSB cable
yInstrument quality certificate
yInstruction manual
2. INSTRUMENT OVERVIEW
MW is a compact and versatile bench meter that can measure up to six dierent
parameters — pH, ORP, EC, TDS (Total Dissolved Solids), percentage of salinity (NaCl%)
and temperature in a variety of ranges.
pH calibration can be performed in up to 5-point (using a selection of 7 standard
calibration buers and two custom buers), to improve measurement reliability even
when testing samples with wide dierences in pH.
The auto-ranging feature for both EC and TDS measurements automatically sets the
most suitable resolution for the tested sample. All measurements can be automatically
(ATC) or manually temperature compensated (MTC) with a user-selectable compensation
coeicient. The temperature compensation can be disabled if the actual conductivity
value is required (No TC).
Available log space for two sets of up to 1000 records. Logged data can be exported using
a USB cable.
MW has a dedicated GLP key to store and recall data on system status.

6MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
3. SPECIFICATIONS
Range Resolution Accuracy
@25°C (77°F)
Calibration
pH -2.00 to 20.00 pH
-2.000 to 20.000 pH
0.01 pH
0.001 pH
±0.01 pH
±0.002 pH
Up to 5-point automatic
pH calibration,
7standard calibration
buers: pH1.68, 4.01,
6.86, 7.01, 9.18, 10.01
and12.45
Two custom buers
ORP ±2000.0 mV 0.1 mV ±1 mV
EC
0.00 to 29.99 S/cm
30.0 to 299.9 S/cm
300 to 2999 S/cm
3.00 to 29.99 mS/cm
30.0 to 200.0 mS/cm
up to 500.0 mS/cm
absolute conductivity*
0.01 S/cm
0.1 S/cm
1 S/cm
0.01 mS/cm
0.1 mS/cm
±1% of reading
(±0.05 S/
cm or 1digit,
whichever is
greater)
Single cell factor
calibration
6standards: 84S/cm,
1413S/cm,5.00mS/cm,
12.88mS/cm,80.0mS/cm,
111.8mS/cm
One-point oset:
0.00S/cm
TDS
0.00 to 14.99 ppm (mg/L)
15.0 to 149.9 ppm (mg/L)
150 to 1499 ppm (mg/L)
1.50 to 14.99 g/L
15.0 to 100.0 g/L
up to 400.0 g/L absolute
TDS* (with 0.80 factor)
0.01 ppm
0.1 ppm
1 ppm
0.01 g/L
0.1 g/L
±1% of reading
(±0.03 ppm
or 1digit,
whichever is
greater)
Salinity
0.0 to 400.0 % NaCl
2.00 to 42.00 PSU
0.00 to 80.00 g/L
0.1% NaCl
0.01 PSU
0.01 g/L
±1% of reading
one-point with
MA Salinity
calibration solution
Temperature -20.0 to 120.0 °C
(-4.0 to 248.0 °F) 0.1 °C (0.1 °F) ±0.5 °C (±0.9 °F)
Temperature
compensation
ATC – automatic, from -20 to 120 °C (-4 to 248 °F)
MTC – manual, from -20 to 120 °C (-4 to 248 °F)
NO TC – without temperature compensation
Conductivity
temperature coeicient
0.00 to 6.00 % / °C (EC & TDS only)
Default value: 1.90 % / °C
TDS factor 0.40 to 0.80, Default value: 0.50
Logging memory
Two independent storage spaces. Each save location can contain
max.1000 log records (stored in up to 100 lots).
On demand, 200 logs; on stability, 200 logs; interval logging, 1000 logs
* Absolute conductivity (or TDS) is the conductivity (or TDS) value without temperature compensation.

SPECIFICATIONS 7
PC connectivity 1 USB port, 1 micro USB port
Power supply 12 VDC adapter (included)
Battery type internal
Battery life 8 hours
Environment 0 to 50 °C; maximum RH 95%
Dimensions 230 x 160 x 95 mm (9.0 x 6.3 x 3.7”)
Weight 0.9 kg (2.0 lb.)
Warranty 3 years
PROBE SPECIFICATIONS
pH electrode
MAB/1
pH range 0 to 14 pH
Temperature range 0 to 70 °C (32 to 158 °F)
Operating temperature 20 to 40 °C (68 to 104 °F)
Reference electrolyte KCl 3.5M
Reference junction Ceramic, single
Reference type Double, Ag/AgCl
Maximum pressure 0.1 bar
Body Glass; tip shape: sphere
Connector BNC
Dimensions Shaft length: 120 mm (5.5"); Ø 12 mm (0.5")
Cable Length 1 m (3.2 ft)
EC/TDS/NaCl probe
MADB/1
Temperature range 0 to 60 °C (32 to 140 °F)
Temperature sensor NTCK
4-ring type Stainless steel
Body ABS
Connector DIN, 7 pins
Dimensions Total length: 140 mm (5.5")
Active part: 95 mm (3.7"); Ø 16.3 mm (0.64")
Cable Length 1 m (3.2 ft)
Temperature probe
MAR
Temperature sensor NTCK
Body Stainless steel
Connector RCA
Dimensions Total length: 190 mm (7.5”)
Active part: 120 mm (5.5”); Ø 3,6 mm (1.4”)
Cable Length 1 m (3.2 ft)

8MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
4. FUNCTIONAL & DISPLAY DESCRIPTION
Front Panel
1
2
3
4
5
6
7
9
8
10
1. Liquid Crystal Display (LCD)
2. ESC key, to exit current mode
3. RCL key, to recall the logged values
4. SETUP key, to enter setup mode
5. LOG/CLEAR key, to log the reading or to clear calibration or logging
6. ON/OFF key
7.  directional keys for menu navigation, select setup parameters and
calibration solutions
8. RANGE/key, to select setup parameters and toggle between measurement units
9. GLP/ACCEPT key, to enter GLP or to confirm selected action
10. CAL/EDIT key, to enter/edit calibration settings, edit setup settings

FUNCTIONAL & DISPLAY DESCRIPTION 9
Rear Panel
1
2 4 5 6 73
1. Power supply socket
2. USB type A socket
3. Micro USB socket
4. DIN probe connector
5. Reference electrode connector
6. RCA connector for temperature probe
7. BNC electrode connector

10 MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
Display Description
1
2
4
5
6
7
15
8
9
10
11
12
13
14
3
1. Measurement units
2. Stability indicator
3. DATE tag
4. USB connection status
5. pH calibration buers
6. Probe symbol and probe condition
7. LOG tag and ACCEPT tag
8. Mode tags (LOG, RCL, CAL, GLP, SETUP, MEASURE)
9. First LCD line, measurement reading
10. Arrow tags, to navigate the menu in either direction
11. Measurement units / Temperature compensation status (NOTC, MTC, ATC)
12. Second LCD line, temperature reading
13. Temperature and measurement units
14. Measurement units / oset & slope indicators / TDS settings
15. Third LCD line, message area

PROBE DESCRIPTION 11
5. PROBE DESCRIPTION
MAB/1 for pH measurement.
yDouble junction design, reduces risk of clogging with the reference cell physically
separated from the intermediate electrolyte.
yRefillable, with MA 3.5M KCl. This solution is silver free. Silver can cause silver
precipitate to form at the junction resulting in clogging. Clogging causes erratic and
slow readings. The ability to refill the electrolyte also extends the life of the electrode.
yGlass body, is easily cleaned and resistant to chemicals.
yRound tip, provides the largest possible surface area for faster readings and is well
suited to testing liquid samples.
1
2
3
4
5
6
7
1. Temperature sensor
2. Internal reference cell
3. Reference wire
4. Reference fill hole
5. Sensing wire
6. Reference junction
7. Glass bulb

12 MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
MADB/1 for conductivity, TDS, salinity and temperature measurement.
yDirect signal processing for noise-free measurements
yAccurate and integrated temperature measurement
1
2
3
4
1. O-ring
2. Plastic insulator
3. Steel rings
4. Probe sleeve

PROBE DESCRIPTION 13
MAR for temperature measurement and automatic temperature compensation (ATC).
yMade of stainless steel for corrosion resistance
yUsed in conjunction with the pH electrode to utilize the instrument’s ATC capability
1
2
3
1. Cable
2. Handle
3. Stainless steel tube

14 MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
6. GENERAL OPERATIONS
6.1. POWER CONNECTION & BATTERY MANAGEMENT
MW180 has a built-in rechargeable battery that provides up to 8 hours of use. The internal
battery recharges with the supplied 12 VDC adapter or while connected to a PC USB port
or standard 5V USB charger.
MW180 is equipped with Battery Error Prevention System (BEPS) feature, which turns the
meter o after 10 minutes of non-use (see Auto O in GENERAL SETUP OPTIONS section).
At power on, the instrument performs an auto-diagnostic test and all LCDsegments are
displayed for a few seconds. Use  keys to check the battery percentage.
Note: When the instrument is switched on, it will start measuring in the previously
selected measurement mode (pH/ORP or EC/TDS/Salinity) and settings.
6.2. MOUNTING THE ELECTRODE HOLDER
Take the MA electrode holder from the box.
yMount the supplied metallic plate onto the meter. Tighten the screw to lock in place.
yMount the arm holder over the metallic pin from the plate.
6.3. CONNECTING THE PROBES
6.3.1. MAB/1 pH Probe
MAB/1 is connected to the meter through a BNC connector (labeled pH/ORP).
With the meter o:
yConnect the probe to the BNC socket on the top right of the meter.
yAlign and twist the plug into the socket.
yPlace the probe into the holder and secure the cable in clips.
6.3.2. MADB/1 EC/TDS/NaCl Probe
MADB/1 is connected to the meter through a DIN connector
With the meter o:
yWith the meter o, connect the probe to the DIN socket on the top of the meter.
yAlign the pins and key then push the plug into the socket.
yPlace the probe into the holder and secure the cable in clips.

GENERAL OPERATIONS 15
6.3.3. MAR Temperature Probe
MARis connected to the meter through a RCA connector (labeled Temp.)
With the meter o:
yConnect the probe to the RCA socket on the top right of the meter.
yPush the plug into the socket.
yPlace the probe into the holder and secure the cable in clips.
6.4. ELECTRODE CARE & MAINTENANCE
6.4.1. MAB/1 pH PROBE
Calibrating & Conditioning
Maintaining a pH electrode is critical to ensure proper and reliable measurements. Frequent
2- or 3-point calibrations are recommended to ensure accurate and repeatable results.
Prior to using the electrode for the first time
1. Remove the protective cap. Do not be alarmed if salts deposits are present, this is
normal. Rinse the electrode with distilled or deionized water.
2. Place the electrode in a beaker containing MA Cleaning solution for a minimum
of 30 minutes.
Note: Do not condition a pH electrode in distilled or deionized water as this will
damage the glass membrane.
3. For refillable electrodes, if the refill solution (electrolyte) has dropped more than
2½cm (1”) below the fill hole, add the appropriate electrolyte solution.
4. After conditioning, rinse the sensor with distilled or deionized water.
Note: To ensure quick response and avoid cross-contamination, rinse the electrode tip
with the solution to be tested before measurement.
Best practice when handling an electrode
yElectrodes should always be rinsed between samples with distilled or deionized water.
yDo not wipe an electrode as wiping can cause erroneous readings due to static charges.
yBlot the end of the electrode with lint-free paper.

16 MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
Storage
To minimize clogging and ensure quick response time, the glass bulb and the junction
should be kept hydrated.
Add a few drops of MA Storage solution to the protective cap. Replace the storage
cap when the probe is not in use.
Note: Never store the probe in distilled or deionized water.
Regular Maintenance
yInspect the probe. If cracked, replace the probe.
yInspect the cable. Cable and insulation must be intact.
yConnectors should be clean and dry.
yRinse o salt deposits with water.
yFollow storage recommendations.
For refillable electrodes:
yRefill the electrode with fresh electrolyte solution (see the electrode’s specifications
to select the correct refilling solution).
yKeep the electrode upright for 1 hour.
yFollow the storage procedure above.
If electrodes are not maintained correctly both accuracy and precision are aected. This
can be observed as a steady decrease in the slope of the electrode.
The slope (%) indicates the sensitivity of the glass membrane, the oset value (mV)
indicates the age of electrode and provides an estimation when the probe needs to be
changed. The slope percentage is referenced to the ideal slope value at 25 °C.
Milwaukee Instruments recommends that the oset does not exceed ±30 mV and that the
slope percentage is between 85-105%.
When the slope value drops below 50 mV per decade (85% slope eiciency) or the oset
at the zero point exceeds ± 30 mV, reconditioning may improve performance, but a
change of electrode may be necessary to ensure accurate pH measurements.
Electrode Status
MW180 displays electrode status after calibration. See probe icon on the LCD screen.
The assessment remains active for 12 hours and is based on the electrode oset and
slope during calibration.

GENERAL OPERATIONS 17
5 bars Excellent condition
4 bars Very good condition
3 bars Good condition
2 bars Fair condition
1 bar Poor condition
1 bar blinking Very poor condition
no bar Not calibrated
Recommendations:
y1 bar: Clean the electrode and recalibrate. If there is still only 1bar or 1bar blinking
after recalibration, replace the probe.
yNo bar: Instrument was not calibrated on current day or a one-point calibration was
performed with previous calibration not yet deleted.
6.4.2. MADB/1 EC/TDS/NaCl Probe
When using a new probe, remove the sleeve and inspect the probe prior to use.
Calibrating
Calibration is the first step in obtaining accurate and repeatable results. See CALIBRATION
section for details.
Best practice
yAlways use fresh standards. The calibration standards are easily contaminated.
yDo not reuse standards.
yDo not use expired standards.
Regular Maintenance
yInspect the probe for cracks or other damage. Replace the probe if necessary.
yInspect sensor o-ring for nicks or other damage.
yInspect the cable. Cable and insulation must be intact.
yConnectors should be clean and dry.
yFollow storage recommendation.
Cleaning Procedure
If a more thorough cleaning is required, remove the sleeve and clean the probe with a
cloth and a nonabrasive detergent. Reinsert the sleeve and recalibrate the probe.
Storage
EC probes should always be stored clean and dry.

18 MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
7. SETUP
7.1 . MEASUREMENT MODES
MW180 can switch between measurement modes from the measurement screen.
Available options for setup, calibration and measurement will depend on selected mode.
yPress RANGE/from the measurement screen
ySelect PH or ORP to enter pH mode
ySelect CONDUCTIVITY, TDS, SALINITY to enter EC mode
Measurement Mode Setup Mode Measurements
PH pH pH
ORP mV
CONDUCTIVITY
EC
EC
TDS TDS
SALINITY %NaCl
To configure the meter settings, modify default values or set measurement parameters:
yPress RANGE/to select a measurement mode
yPress SETUP to enter (or exit) Setup mode
yUse  keys to navigate the menus (view parameters)
yPress CAL/EDIT to enter Edit mode (modify parameters)
yPress RANGE/key to select between options
Use  keys to modify values (value being modified is displayed blinking)
yPress GLP/ACCEPT to confirm and save changes (ACCEPT tag is displayed blinking)
yPress ESC (or CAL/EDIT again) to exit Edit mode without saving (return to menu)

SETUP 19
7. 2 . GENERAL SETUP OPTIONS
Options available from any measurement mode, with or without a probe connected.
Log Type
Options: INTERVAL (default), MANUAL or STABILITY
Press RANGE/to select between options.
Use  keys to set time interval: 5 (default), 10, 30 sec. or 1, 2, 5, 15, 30, 60, 120, 180 min.
Use  keys to select stability type: fast (default), medium or accurate.
Calibration Expired Warning
Options: 1 to 7 days (default) oro
Use  keys to select the number of days since last calibration has elapsed.

20 MW180 pH / mV / EC / TDS / NaCl / Temperature Bench Meter
Date
Options: year, month or day
Press RANGE/to select options. Use  keys to modify the values.
Time
Options: hour, minute or second
Press RANGE/to select. Use  keys to modify the values.
Auto O
Options: 5, 10 (default), 30, 60 minutes or o
Use  keys to select the time.
The meter will power o after set period of time.