Milwaukee Mi 180 Manual de usuario

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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/Temperatureemperature

emperatureemperature

emperature

INSTRUCTION MANUAL

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Instruction Manual Mi 180 Bench Meter

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

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

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FUNCTIONALDESCRIPTION

RS 232

POWER

12VDC

USB

TEMP

REF

15 16

14 18

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 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

Instruction Manual Mi 180 Bench Meter

GENERALDESCRIPTION

Thank you for choosing Milwaukee Instruments. This instruction manual will provide you

the necessary information for correct use of the meter.

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.

Instruction Manual Mi 180 Bench Meter

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 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

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.

Instruction Manual Mi 180 Bench Meter

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).

mV / RELV / REL

V / RELV / REL

V / REL 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

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

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

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

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.

Instruction Manual Mi 180 Bench Meter

1010

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

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

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.

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