Milwaukee Mi 180 User manual

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Multiparameter Bench MeterMultiparameter Bench Meter
Multiparameter Bench MeterMultiparameter Bench Meter
Multiparameter Bench Meter
Mi 180
pH/mV/EC/TDS/NaCl/TpH/mV/EC/TDS/NaCl/T
pH/mV/EC/TDS/NaCl/TpH/mV/EC/TDS/NaCl/T
pH/mV/EC/TDS/NaCl/Temperatureemperature
emperatureemperature
emperature
INSTRUCTION MANUAL
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Instruction Manual Mi 180 Bench Meter
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FUNCTIONAL DESCRIPTION ............................................................................................ 2
GENERAL DESCRIPTION ................................................................................................... 4
SPECIFICATIONS .............................................................................................................. 5
OPERATIONAL GUIDE ..................................................................................................... 7
AUTORANGING ............................................................................................................. 11
pH CALIBRATION ........................................................................................................... 12
pH BUFFER TEMPERATURE DEPENDENCE ........................................................................ 15
RELATIVE mV CALIBRATION ............................................................................................. 16
EC/TDS CALIBRATION ..................................................................................................... 17
NaCl CALIBRATION ........................................................................................................ 18
GOOD LABORATORY PRACTICE (GLP) ............................................................................ 19
LOGGING .................................................................................................................... 25
SETUP ............................................................................................................................ 33
mV CALIBRATION ........................................................................................................... 35
TEMPERATURE CALIBRATION .......................................................................................... 36
EC SOLUTIONS TEMPERATURE DEPENDENCE ................................................................. 37
PC INTERFACE ............................................................................................................... 38
ELECTRODE CONDITIONING & MAINTENANCE ............................................................. 40
TROUBLESHOOTING ..................................................................................................... 42
ACCESSORIES ................................................................................................................ 43
DISPLAYDISPLAY
DISPLAYDISPLAY
DISPLAY
A. PRIMARY DISPLAY
B. MEASURING UNIT FOR PRIMARY
DISPLAY
C. CALIBRATION MESSAGES
D. MEMORIZED pH CALIBRATION
BUFFERS
E. CALIBRATION TAGS
F. GLP TAGS
G. MODE INDICATORS
H. REQUIRE USER CONFIRMATION
I. CALIBRATION REQUESTED
J. SECONDARY DISPLAY
K. MEASURING UNIT FOR SECONDARY
DISPLAY
L. TEMPERATURE COMPENSATION
MODE INDICATOR
M. CALIBRATION MESSAGES
N. MEASURING UNIT FOR PRIMARY
DISPLAY
FUNCTIONAL DESCRIPTION
B
A
C
D
E
G
F
H
I
J
K
L
M
N

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FUNCTIONALDESCRIPTION
RS 232
POWER
12VDC
USB
EC
TEMP
REF
15 16
17
19
13
14 18
FRONT PANELFRONT PANEL
FRONT PANELFRONT PANEL
FRONT PANEL
1. Liquid Crystal Display (LCD)
2. CAL key, to enter/exit calibration mode
3. GLP/ACCEPT key, to display GLP data
or to confirm value
4. SHIFT key, to select second key function
5. LOG/CLR/MR key, to store reading in
memory, to clear calibration or to en-
ter/exit recall mode
6. MODE/SETUP key, to select measure-
ment mode/pH resolution, to enter/
exit setup mode or to toggle between
delete one or all logged data
7. /ATC key, to manually decrease tem-
perature value or other parameters or to
select temperature compensation mode
8. RANGE/FIXED key, to switch measure-
ment unit pH/mV/EC or focused data,
or to freeze current reading on the LCD
9. /TC key, to manually increase tem-
perature value or other parameters or
to view temperature coefficient value
10. ON/OFF key, to turn the meter ON
and OFF
11. Secondary LCD
12. Primary LCD
REAR PANELREAR PANEL
REAR PANELREAR PANEL
REAR PANEL
13. USB connector
14. RS232 connector
15. Power supply socket
16. DIN connector for EC probe
17. Reference pH electrode socket
18. BNC pH electrode connector
19. Temperature probe socket
12
11
10
9
8
7
6
5
4
3
2
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Instruction Manual Mi 180 Bench Meter
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GENERALDESCRIPTION
Thank you for choosing Milwaukee Instruments. This instruction manual will provide you
the necessary information for correct use of the meter.
Mi
Mi 180 is a logging microprocessor-based pH, ORP, EC, TDS, NaCl and temperature bench meter.
This meter is provided with a series of new diagnostic features which add an entirely
new dimension to the measurement of pH/ORP/EC/TDS/NaCl, by allowing the user to
dramatically improve the reliability of the measurement:
•7 memorized buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) for pH calibration
• pH calibration up to 3 points
• Messages on the LCD to make the calibration easy and accurate
• Relative mV feature
• GLP feature, to view last calibration data for pH, EC or NaCl
• User-selectable alarm time out to alert the user that too much time elapsed since the
last pH calibration
•Log-on-demand (50 samples for each range: pH, mV/Rel mV, EC, TDS, NaCl)
Moreover, it offers an extended temperature range from –20 °C (–4 °F) to 120 °C (248°F),
using MA 831RMA 831R
MA 831RMA 831R
MA 831R interchangeable temperature probe or the temperature sensor inside
the EC probe.
The autoranging feature of the EC and TDS ranges automatically sets the instrument to
the scale with the highest possible resolution.
The conductivity measurements are manually or automatically compensated for tem-
perature effect, with the temperature sensor inside the conductivity probe. It is also
possible to disable the temperature compensation and measure the actual conductivity.
The temperature coefficient is user selectable.
For accurate measurements, use the electrode holder supplied with the meter.
This Bench Meter is supplied with:
• MA 917B/1 pH Electrode
• MA 831R Temperature Probe
• MA 814DB/1 EC/Temperature Probe
• MA 9315 Electrode Holder
• M 10004 pH 4.01 Sachet Buffer Solution
• M 10007 pH 7.01 Sachet Buffer Solution
• M 10010 pH 10.01 Sachet Buffer Solution
• M 10016 Sachet Electrode Cleaning Solution
• M 100 31 1,413 mS/cm Cal Solution Sachet
• M 100 16 Cleaning Solution Sachet
• Mi 5200 Application Software
• MA 9350 RS232 Connector cable (2 meters)
• Graduate Pipet
• 12 VDC Adapter
• Instruction Manual

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SPECIFICATIONS
Range pH -2.00 to 16.00 pH / -2.000 to 16.000 pH
mV ±699.9 mV / ±2000 mV
EC 0.00 to 29.99 μS/cm
30.0 to 299.9 μS/cm
300 to 2999 μS/cm
3.00 to 29.99 mS/cm
30.0 to 200.0 mS/cm
up to 500.0 mS/cm (uncompensated EC)*
TDS 0.00 to 14.99 mg/L (ppm)
15.0 to 149.9 mg/L (ppm)
150 to 1499 mg/L (ppm)
1.50 to 14.99 g/L (ppt)
15.0 to 100.0 g/L (ppt)
up to 400.0 g/L (uncompensated TDS)* with 0.80 conversion factor
NaCl 0.0 to 400.0%
Temp -20.0 to 120.0 °C (-4.0 to 248.0 °F)
Resolution pH 0.01 pH / 0.001 pH
mV 0.1 mV / 1 mV
EC 0.01 μS/cm
0.1 μS/cm
1 μS/cm
0.01 mS/cm
0.1 mS/cm
TDS 0.01 mg/L
0.1 mg/L
1mg/L
0.01 g/L
0.1 g/L
NaCl 0.1%
Temp 0.1 °C (0.1 °F)
(*)Uncompensated conductivity (or TDS) is the conductivity (or TDS) value without temperature compensation.

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Accuracy pH ±0.01 pH / ±0.002 pH
(@ 20 °C / 68 °F) mV ±0.2 mV / ± 1 mV
EC ±1% of reading ±(0.05 μS/cm or 1 digit)
TDS ±1% of reading ±(0.03 mg/L or 1 digit)
NaCl ±1% of reading
Temp ±0.4 °C (±0.8 °F)
Rel mV offset ±2000 mV
Calibration pH 1, 2 or 3 points calibration, with 7 memorized buffers:
1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45
EC 1 point slope calibration with 6 memorized solutions available:
84.0 μS/cm, 1413 μS/cm, 5.00 mS/cm, 12.88 mS/cm,
80.0 mS/cm, 111.8 mS/cm;
1 point offset calibration: 0.00 μS/cm
NaCl 1-point, with MA 9050 calibration solution
Temp 2-point, at 0 and 50 °C (32 and 122 °F)
Temperature Automatic or manual, from -20.0 to 120.0 °C (-4.0 to 248.0 °F)
Compensation
Temperature Selectable from 0.00 to 6.00%/ °C (EC and TDS only)
Coefficient
TDS factor 0.40 to 0.80 (default value is 0.50)
pH Electrode MA 917B/1 (included)
Temperature Probe MA 831R (included)
EC Probe MA 814DB/1 (included)
Input Impedance (pH) 1012 ohms
Computer Interface RS232/USB opto-isolated
Power supply 12 VDC power adapter
Dimensions 230 x 160 x 95 mm (9.0 x 6.3 x 3.7")
Weight 0.9 kg (2.0 lb.)
Environment 0 to 50 °C (32 to 122 °F) ; max RH 95%
Warranty 3 years
This instrument is in compliance with the CE Directives.

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OPERATIONAL GUIDE
INITIAL PREPARATIONINITIAL PREPARATION
INITIAL PREPARATIONINITIAL PREPARATION
INITIAL PREPARATION
Plug the 12 VDC adapter to the power supply socket. To prepare the instrument for pH
measurements, connect the pH electrode to the BNC connector and the temperature
probe to the appropriate socket on the rear panel of the instrument. The temperature
probe is used in conjunction with the pH electrode to utilize the instrument's ATC
capability, but it can also be used independently to take temperature measurements.
For electrodes with a separate reference, connect the electrode’s BNC to the BNC
connector and plug the reference electrode to the reference socket.
For temperature measurements and pH automatic temperature compensation connect the
temperature probe to the appropriate socket. After taking measurements switch the meter
off, clean the electrode and store it with a few drops of MA 9015MA 9015
MA 9015MA 9015
MA 9015 storage solution in the
protection cap.
For EC/TDS measurements connect the EC probe to the 7-pin connector. Make sure the
probe sleeve is properly inserted and tighten the threaded ring.
The instrument enters the same range and mode as it was at power off.For pH and mV/Rel mV
modes, after turning the instrument on, the “OPEN” tag and the “ ” and “ ” symbols from the
electrode blink on the LCD for a few seconds to remind the user to unscrew the electrode
refilling cap, and to remove the protective cap before taking measurements.
pHpH
pHpH
pH MEASUREMENTSMEASUREMENTS
MEASUREMENTSMEASUREMENTS
MEASUREMENTS
Make sure the instrument has been calibrated before taking pH measurements.
• If necessary, press the RANGE key until the display changes to pH mode.
• Submerge the tip of the electrode (4cm/1½") and the temperature probe into the sample
to be tested and stir gently. Allow for the electrode to stabilize.
• The pH measurement is displayed on the primary LCD and the temperature on the secondary LCD.
• If the reading is out of range, the closest full-scale value will blink on the primary LCD.

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The display will show the default temperature of 25 °C or the last temperature reading with
the “MTC” tag and “°C” (or “°F”) tag blinking.
The temperature can now be adjusted with the UP and DOWN arrow keys (from –20.0 °C to
120.0 °C).
mm
mm
mV / RELV / REL
V / RELV / REL
V / REL mm
mm
mV MEASUREMENTSV MEASUREMENTS
V MEASUREMENTSV MEASUREMENTS
V MEASUREMENTS
An optional ORP electrode must be used to perform ORP measurements (see “Accessories” section).
Oxidation-Reduction Potential (ORP) measurements provide the quantification of the oxidizing or
reducing power of the tested sample.
To perform an ORP measurement correctly, the surface of the electrode must be clean and
smooth.
• If necessary, press the RANGE/FIXED key until the display changes to mV/Rel mV.
• Submerge the ORP electrode tip (4cm/1½") into the sample to be tested and allow a
few seconds for the reading to stabilize.
• The instrument displays the mV reading on the primary LCD or Rel mV reading if a Rel mV
calibration has been performed and the temperature on the secondary LCD.
NoteNote
NoteNote
Note: To change pH resolution press the MODE/SETUP key.
If measurements are taken successively in different samples, it is recommended to rinse the
electrode thoroughly with deionizated water and then with some of the sample to be tested.
The pH reading is affected by temperature. In order to measure the pH accurately, the
temperature effect must be compensated. To use the Automatic Temperature Compensation
(ATC) feature, connect and submerge the MA 831RMA 831R
MA 831RMA 831R
MA 831R temperature probe into the sample as
close as possible to the electrode and wait for a few seconds. The “ATC” tag will be
displayed.
If Manual Temperature Compensation (MTC) is desired, the temperature probe must be
disconnected from the instrument.

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NotesNotes
NotesNotes
Notes:
•When the reading is out of range, the closest full-scale value is displayed blinking.
•If using a pH electrode while in mV mode, the instrument will measure the mV generated
by the pH electrode.
•If the instrument displays a Rel mV reading and it is desired to take mV measurements,
simply clear the Rel mV calibration (see Rel mV calibration section at page 16).
CONDUCTIVITYCONDUCTIVITY
CONDUCTIVITYCONDUCTIVITY
CONDUCTIVITY MEASUREMENTSMEASUREMENTS
MEASUREMENTSMEASUREMENTS
MEASUREMENTS
Make sure the instrument has been calibrated before taking conductivity measurements.
• Press the RANGE/FIXED key to enter EC measurement mode.
• Immerse the probe into the solution to be tested. The sleeve holes must be completely submerged.
Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve.
• The conductivity value is displayed on the primary LCD and the temperature on the secondary
LCD, along with the reference temperature.
NotesNotes
NotesNotes
Notes:
•If the reading is out of range, the closest full-scale value (200.0 mS for MTC/ATC mode or
500.0 mS for uncompensated conductivity) will be displayed blinking.
•If SHIFT&RANGE/FIXED keys are pressed to freeze the LCD range and the reading goes
out of range, the full-scale value of the frozen range will be displayed blinking.
The EC reading is affected by temperature. Three options for temperature compensation are
available in EC measurement mode.
or

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NoteNote
NoteNote
Note: The compensation is referenced at the selected reference temperature (see
SETUP for details, page 33).
Automatic (ATC): The EC probe has a built-in temperature sensor; the temperature value is
used to automatically compensate the EC/TDS reading (from -20.0 – 120.0 °C).
Manual (MTC): The temperature value, shown on the secondary LCD, can be manually set
with the UP and DOWN arrow keys. The “°C” tag blinks when this option is active.
No Compensation (NOTC): The temperature value is displayed, but it is not taken
into account. The reading displayed on the primary LCD is the uncompensated EC or TDS
value. To select the desired option, press the SHIFT& /ATC keys until the option is
displayed on the LCD.
NotesNotes
NotesNotes
Notes:
•The default compensation mode is ATC.
•If no temperature probe is detected, ATC mode can not be selected and the instru-
ment displays “----” on the secondary LCD.
If temperature compensation is active, measurements are compensated using the tem-
perature coefficient (default value 1.90 %/°C). To change the temperature coefficient,
enter the setup mode and select the “tc” item (see SETUP for details, page 33). The
current temperature coefficient can be quickly viewed by pressing the SHIFT& /TC keys.
The value is briefly displayed on the secondary LCD.
• If the temperature reading is out of the -20.0 to 120.0 °C (-4.0 to 248.0 °F) interval and ATC
option is selected, the “°C” tag will blink and the closest interval limit will be displayed.
• By pressing the UP and DOWN arrow keys the displayed temperature value can be
changed. This value is used to compensate the EC/TDS reading.
TDSTDS
TDSTDS
TDS MEASUREMENTSMEASUREMENTS
MEASUREMENTSMEASUREMENTS
MEASUREMENTS
• Press the MODE/SETUP key while in EC range until the display changes to TDS mode.
• The TDS reading will be displayed on the primary LCD and the temperature reading on
the secondary LCD, along with the reference temperature.