Westlab 664-952 User manual

1
PRODUCT MANUAL
pH 50 Benchtop
Meter Kit
Code 664-952

This page has been left intentionally blank.

3
PRODUCT MANUAL
1800 358 101
[e-mail]
www.westlab.com.au
[phone]
[e-mail]
www.westlab.co.nz
646 568 5391
[e-mail]
www.westlab.com
1 877 822 1455
[e-mail]
www.westlab.com
Australia New Zealand United StatesCanada
1. Product Description
1.1 Introduction
The pH 50 Benchtop Meter allows for the accurate measurement of pH, mV, ORP
and temperature.
The user-friendly coloured LCD display of this product not only allows for easy
brightness adjustment and selection of viewable parameters but also presents all
necessary information, including the buffer used for calibration and a stability icon.
The high-resolution display features guided procedures that enhance the user
experience, ensuring intuitive and safe operation with high-performance outcomes.
Additionally, the display ensures accuracy and eciency through controlled processes,
constantly monitoring all operations and signalling them to the operator via a coloured
LED above the screen and self-diagnosis messages.
The meter includes an automatic pH calibration with the USA and NIST buffers up to
three points and a manual pH calibration up to two points. Additionally, it features an
automatic calibration of the redox potential of ORP at one point. The calibrated points
are shown as icons on the display screen.
1.2 Intended Use
The pH 50 Benchtop Meter is suitable for various applications, including school
laboratories, galvanic baths control, the chemical industry, titration and quality control,
food and beverage, pharmaceutical and clinical laboratories, and the water industry.
Its accuracy, eciency, and reliability make it an ideal tool for professionals and
researchers in these elds.
1.3 Features
• Backlit Coloured LCD Display, Adjustable Brightness
• Supplied Electrode Measuring Range of 0 to 60°C
• Measurement Stability Indicator for Accuracy
• mV Measuring Range of -1000 to +1000
• Meter Measuring Range of 0 to 100°C
• Automatic ORP Calibration at 1 Point
• Automatic pH Calibration at 3 Points
• Manual pH Calibration at 2 Points
• pH Measuring Range of 0 to 14
• Manufactured In Italy
TABLE OF CONTENT
1. Product Description
1.1 Introduction
1.2 Intended Use
1.3 Features
1.4 Accessories
2. Technical Specications
3. Safety Precautions
4. Maintenance & Cleaning
5. Installation
6. Operation
7. Troubleshooting
8. Product Recycling
PRODUCT CODE
664-952
PLEASE READ THESE INSTRUCTIONS BEFORE USE.

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PRODUCT MANUAL
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[phone]
[e-mail]
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646 568 5391
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1 877 822 1455
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1.4 Accessories
Buffer Solution pH 4.01
Single-dose buffer solutions package in plastic containers with screw caps.
They are suitable for calibrating portable instruments in the eld or for calibrating
process instrumentation.
Name Buffer Solution pH 4.01 ± 0.02 / 25°C
Colour Red
Volume 55ml
Certicate No
Quantity 1
Buffer Solution pH 7.00
Single-dose buffer solutions package in plastic containers with screw caps.
They are suitable for calibrating portable instruments in the eld or for calibrating
process instrumentation.
Name Buffer Solution pH 7.00 ± 0.02 / 25°C
Colour Green
Volume 55ml
Certicate No
Quantity 1
pH Electrode
Name pH Electrode 201 T + ATC
pH 0…14
Quantity 1
Stand
Name Electrode Holder
Flexible Arm Yes
Quantity 1
Power Supply
Name AC/DC Adaptor
Input 100 V to 240 V
Frequency 50 Hz to 60 Hz
Australian Connector Yes
Quantity 1

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PRODUCT MANUAL
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[phone]
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2. Technical Specication
Performance Information
pH
Measuring Range 0 to 14.00
Resolution / Accuracy 0.1, 0.01 / ± 0.02
Calibration Points 1…3 Auto + 2 Custom
Buffer Recognised USA, NIST
Buffer Indication Yes
Calibration Report Yes
Stability Filter Low – Nor - High
mV
Measuring Range -1000 to +1000
Resolution 1
ORP
Calibration Points 1 point, 475 mV
Temperature
Measuring Range 0.0°C to 100.0°C
Resolution / Accuracy 0.1 / ± 0.5°C
Compensation 0.0°C to 100.0°C
Miscellaneous
Digital Display High denition coloured backlit LCD
Brightness Adjustment Manual
Environmental Operating Conditions 0°C to 45°C
Permissible Humidity < 95% non-condensing max.
Altitude of Use 2000M max.
Noise Level < 80 dB
Electrical Information
Voltage 100 V to 240 V
Frequency 50 Hz to 60 Hz
Power 5 V power adaptor, ± 10% tolerance
Absorption 200 mA max.
General Information
Serial Number Yes
Unit Dimensions 160mm L x 140mm W x 45mm H
Unit Weight 380g
Protection Class IP 54
Country of Origin Italy
Standards Conformity CE

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[phone]
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Australia New Zealand United StatesCanada
3. Safety Precautions
Read the following safety precautions prior to using the Benchtop Meter.
Never use the unit in any manner not specied in this manual.
• Wear personal protective equipment during the operation of the unit.
• Always install the unit on a at, stable, and non-slippery surface.
• Always unplug the power adaptor before cleaning the unit.
• Never touch moving parts. Do not move the unit during operation.
• The unit is not to be operated in a hazardous, explosive, or ammable environment
and not to be used to mix explosive or highly reactive material. Do not use the unit
under water.
• Do not use the benchtop meter if it shows signs of electrical or mechanical damage.
If any damage is found, contact your supplier immediately.
• Do not use the meter if it has been stored for a long period to time in adverse
conditions such as exposure to direct light, heat sources or places saturated by gas
or vapours, or in environments with conditions different from those mentioned within
this manual.
• Ensure that the attachments are secured properly prior to operation.
• Do not use without appropriate training. Always follow the installation instructions.
• In case of prolonged unuse, cover the BNC connectors with the special cap.
• Do not open the unit’s housing as it does not contain parts that can be maintained,
repaired, or replaced by the user.
The safety of the user cannot be guaranteed if the unit:
• Is operated with accessories that are not supplied with the unit
• Is operated with accessories that are not supplied or recommended by the manufacturer
• Is operated improperly or contrary to the manufacturer’s specications
4. Maintenance & Cleaning
• Always unplug the power adaptor before cleaning the unit.
• Wear protective gloves and safety glasses while cleaning the unit.
• Excessive amounts of liquid should be avoided. Liquids must not contact the motor.
• If used correctly and in a suitable environment, the meter does not require
maintenance.
• It is recommended to occasionally clean the housing with a damp cloth and a
mild detergent. Note that the housing is ABS/PC [acrylonitrile butadiene styrene/
polycarbonate] - it is sensitive to some organic solvents such as toluene, xylene,
and methyl ethyl ketone [MEK].
• After cleaning, ensure that all the parts are dried.
• For maintenance of the electrochemical sensors, refer to the documentation within
the packaging or contact the supplier.
• If repairs are performed by unauthorised personnel, the product warranty may
become void.

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5. Installation
1. Open the packaging and gently remove the benchtop meter from the box.
2. Place the unit gently onto a rm and levelled surface.
3. Unpack every individual component.
4. Assemble the components as instructed in this manual for optimal performance.
ATTENTION! The manual should be kept with the device and all the packaging should
be kept in safe storage for at least two years for warranty purposes.
ATTENTION! If the unit is damaged on unpacking, please contact Westlab Pty Ltd
immediately.
Location and mounting
Place the benchtop meter on a at, solid, and levelled surface. Ensure that all four feet
stand on the surface rmly. Avoid installing on a slippery surface or a bench prone
to vibration.
• Keep a minimum clearance of 200mm from all directions to guarantee safe operation.
• Keep the unit away from heat or water to avoid sample temperature errors.
• Do not place the meter in an area that makes it dicult to operate the unit.
• Ensure that the surrounding environment is correctly illuminated.
• Use in a well-ventilated area.
Connecting the power supply
• Ensure that the electrical standards of the connected power source complies with
the voltage and operating frequency of the benchtop meter.
• Use the original power supply only.
• Connect the power supply plug to the connector on the rear of the meter indicated
with the 5V icon.
• Connect the power supply to an easy to reach power socket.
• The unit is equipped with a power supply that isn’t protected against liquid entry.
Therefore, it is necessary to keep all electrical cables and connections away from
any liquids and humidity.
• In the event of accidental loss of power during operation of the meter, the user isn’t
in danger of electrical shock. The meter will not automatically turn on after the loss
of power. Press the ON button to turn the meter back on.
ATTENTION! Danger of death or serious injury from electrical shock. Contact with
live components can lead to injury or death.
• Use the supplied adaptor only.
• Do not put the power supply in contact with liquids or in a condensing
environment. Avoid thermal shock.
• All electrical cables and connections must be kept away from moisture or liquids.
• Ensure that the cables and plugs are not damaged, otherwise replace them.
• During use, do not cover the power supply and/or do not place it inside containers.

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PRODUCT MANUAL
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[phone]
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1 877 822 1455
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Australia New Zealand United StatesCanada
Input and output connections
The BNC connectors are protected by a plastic cap. Remove the cap before connecting
the probes.
Turning ON and OFF
Turn on the benchtop meter by pressing the button. The display will show:
• model and rmware of the unit
• settings related to the more important parameters
• the unit will switch ON at the last parameter used
To turn OFF the meter, press the button in measurement mode.
Transporting the meter
Disconnect the meter from the power supply and remove all of the connection cables.
Remove the electrode arm from its holder.
To avoid damage to the meter during long distance transport, use the original
packaging. If the original packaging is no longer available, choose a package that
guarantees safe transport.
RCA for pH
temperature probe
4mm banana
for reference
electrode
BNC for pH or
ORP electrodes
Connection to the
power supply

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6. Operation
Display
LED Indicators
Function LED Colour Details
Power ON Green Fixed
Power OFF Red Fixed
Standby Green Flashing every 20 seconds
Stable Measure Green Flashing every 3 seconds
Errors During Calibration Red Flashing every 1 second
Errors During Measurement Red Flashing every 3 seconds
Selection Conrmation Green Switched on for 1 second
Timed Screens Green Fixed
Key Functions
Measurement
Parameter
Text String
Indication of
Instrumental Mode
Stability Indicator
Text String
Representation of
Buffers Used for
Calibration
Error Symbol
Date & Time
Battery Charge
Level
Actual Value/
Measuring Unit
Temperature & Type
of Compensation
ATC - Automatic
NTC 30KΩ
MTC - Manual
Indication of Use of
the Directional Keys
ON/OFF
Return to
measuring
mode or to start
calibration
Down directional
button to scroll
through the menu
and values in
setup
Up or mode
directional button
for scrolling through
the menu and values
in setup, and for
scrolling through the
parameters in the
measuring mode
Menu button to
conrm the selected
values and to enter
the setup from the
measuring mode

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PRODUCT MANUAL
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[phone]
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Australia New Zealand United StatesCanada
Button Pressure Function
Short Press to turn the unit ON or OFF.
Short In calibration mode, press to return to measurement mode.
In measurement mode, press to start the calibration.
Short
In measurement mode, press to enter the setup.
In the setup menu, press to select the desired program
and/or value.
During calibration, press to conrm the value.
Short
In the setup and sub-setup menus, press to scroll.
In the sub-setup menus, press to change the value.
In MTC and custom calibration mode, press the
change the value.
Long
(3 seconds)
In measurement mode, keep one of the two buttons
pressed to change the temperature in MTC mode (manual
compensation, without probe). When the value starts
to ash, the user can change the temperature value by
entering the correct one and conrming it with .
Short In measurement mode, press to scroll through the
different parameters: pH > mV > ORP.
The correct use of the function keys and the attention in pressing them, given the
small size, eliminates the residual risk of minor damage, not probable, caused by
simultaneous pressing of the keys. Before using the meter, check that pressing the
keys has the corresponding effect on the display.
Selecting the parameter
After switching ON the meter, it will enter the measurement mode of the last
parameter used.
To scroll through the different parameter displays, press the button. The selected
measurement parameter will show in the top left of the screen. The sequence of
parameters in measurement mode is pH, mV, and ORP. By pressing the button
after the last parameter, the meter automatically restarts from the rst parameter.
In the measurement displays for the pH, mV, and ORP parameters, press the
button to start the calibration of the active parameter. (more detail later in the manual)

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Selecting the mode
On the left-hand side of the screen, the meter will indicate the current mode with a
string of different colours. Note that the string will ash when the user switches from
one mode to another.
String Denition
The meter is in measurement mode.
The meter is in calibration mode
(automatic or manual as per the user’s
choice).
The user is in the setup mode. The
conguration menus may pertain to
the properties of the parameters or the
overall settings of the instrument.
Setup menu
1. In measurement mode, press the button to enter the setup mode.
2. Select the parameter by using the directional buttons and conrming with .
pH settings
ORP settings
Settings
3. Within the selected menu, move between the different programs by using the
directional buttons and press the button to access the required submenu.
4. Using the directional buttons, choose the desired option or change the numerical
value and conrm with .
5. The value or parameter being edited is recognisable as it ashes on the display.
6. The icon indicates that the value or parameter is editable using the
directional buttons.
7. Press the button to return to the previous menu.

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Setup menu structure
P1.0 pH P1.1 Buffer selection
P1.2 Resolution
P1.3 Set stability
P1.6 View pH calibration
P1.8 Reset pH setting
P1.9 Temp calibration pH
P2.0 ORP P2.6 View ORP calibration
P2.8 Reset ORP setting
P2.9 Temp calibration ORP
P9.0 Settings P9.1 Temperature U.M.
P9.4 Brightness
P9.6 Parameters setup
P9.8 Reset
Temperature measurement ATC > MTC
ATC: The direct measurement of the sample temperature for all parameters is carried
out through the NTC 30KΩ probe, which can be either integrated into the sensor
(electrode and/or cell) or external.
MTC: If no temperature probe is connected, the value must be changed manually:
1. Keep the directional buttons pressed until the value starts to ash.
2. Then adjust it by continuing to use the directional buttons.
3. Press the button to conrm.
pH parameter
On the pH 50 meter, it is possible to use pH sensors with an integrated temperature
probe or to connect two different sensors. Connect the pH electrode to the BNC
type connector marked in green. Connect the temperature probe to the RCA/CINCH
temperature connector marked with a green background.

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pH parameter setup
1. In measurement mode, press the button to access the setup menu.
2. Press the button to access the pH P1.0 menu.
3. Move the directional buttons to select the program to access.
The following table displays the structure of the setup menu for the pH parameter,
including the available options and their corresponding default values for each
program:
Program Description Options
Factory
Default Settings
P1.1 CAL BUFFER SELECT USA – NIST – CUSTOM USA
P1.2 SELECT RESOLUTION 0.1 – 0.01 0.01
P1.3 STABILITY FILTER LOW – MED – HIGH MED
P1.6 CALIBRATION DATA - -
P1.8 RESET SETTINGS YES - NO NO
P1.9 TEMPERATURE CAL YES - NO -
P1.1 Selection of pH buffers
• Access this setup to select the buffer family for performing the electrode calibration.
• Calibration lines from 1 to 3 points can be made.
During calibration, press the button to exit and save the points calibrated up to
that point (see calibration section).
The meter automatically recognises two families of buffers (USA and NIST).
Additionally, the user has the option of performing a manual calibration up to two
points with customisable values.
USA Buffers: 1.68 – 4.01 – 7.00* - 10.01 (Factory setting)
NIST Buffers: 1.68 – 4.00 – 6.86* - 9.18
*Neutral point always requested as rst
In the measurement mode, located at the bottom left of the display, a row of beakers
indicates the buffers that were used in the most recent automatic and manual calibrations.
Beaker pH value of the buffer
Acid
< 6.5
Neutral
6.5 to 7.5
Basic
> 6.5

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P1.2 Resolution
Access this menu to select the resolution required when reading the pH parameter:
• 0.1
• 0.01 (default)
P1.3 Stability criterion in pH measurement
To ensure the accuracy of a measured value, it is recommended to wait for the
measurement stability, which is indicated by the icon . When the measurement is
inaccurate, four red ashing bands will appear on the screen.
To modify the criterion for measurement stability:
LOW Choose this option to display the stability icon , even in
conditions of poor stability. Readings include within 1.2 mV.
MEDIUM Default value. Readings include within 0.6 mV.
HIGH Choose this option to display the stability icon , only in
conditions of high measurement stability. Readings include
within 0.3 mV.
P1.6 pH calibration data
Access this menu for information about the last calibration performed. The following
screens will automatically scroll on the display:
• First screen: beakers indicating the buffers used
• Second screen: OFFSET value of the electrode expressed in mV
• Third and possibly fourth screen: Slope percentage in the measuring range (one
slope percentage only if two calibration points are performed, two slope percentages
if three points are performed)
Note that the meter accepts calibrations with pH electrodes with slope percentages
between 80% and 120% only. Outside this range of acceptability, the meter does not
allow ending the calibration and displays the error message: SLOPE OUT OF RANGE.
P1.8 Reset of the pH parameter
If the meter isn’t working accurately or incorrect calibrations are being carried out, conrm
Yes with the button return all of the pH menu parameters to their default settings.
P1.9 Temperature calibration
The meter is pre-calibrated for an accurate temperature reading. However, if there is a
difference between the measured and the actual temperature*, it is possible to perform
an offset adjustment of ± 5°C.
* usually due to a probe malfunction.
1. Use the directional buttons to correct the temperature offset value.
2. Conrm with the button.

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Automatic pH calibration
For instance, three-point calibration with USA type buffers (7.00 / 4.01 / 10.01).
1. In pH measurement mode , press the button to enter the
calibration mode.
2. The string “1ST POINT PH 7.00” will appear on the display. The meter requires the
neutral value as the rst calibration point.
3. Rinse the electrode with distilled water and gently dab with paper towel. Dip the
electrode in the pH 7.00 buffer solution.
4. When the signal is stable, the red bands are replaced by the stability icon .
5. Press the button as indicated by the string “PRESS OK.” The measured value
will ash on the screen and then the icon of the pH 7.00 beaker will appear on the
bottom left . This indicates that the meter is calibrated on the neutral point.
6. Remove the electrode. Rinse with distilled water and dab gently with paper towel. Dip
the sensor in the pH 4.01 buffer solution as indicated by the string “CHANGE BUFFER.”
7. The meter is now ready to recognise the second calibration point.
8. Next to the string “2ND POINT PH,” scroll through the different buffers that the
meter can automatically recognise.
9. When the 4.01 value is recognised and the stability icon appears, press the
button as indicated by the string “PRESS OK.” The actual measured value
and the Slope% will ash on the screen. Subsequently, the icon of the beaker pH
4.01 will appear next to the green beaker. This indicates that the meter is
calibrated in the acid eld.

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10. Remove the electrode. Rinse with distilled water and dab gently with paper towel.
Dip the sensor in the pH 10.01 buffer solution as indicated by the string
“CHANGE BUFFER.”
11. The meter is now ready to recognise the third calibration point.
12. Next to the string “3RD POINT PH,” scroll through the different buffers that the
meter can automatically recognise.
13. When the 10.01 value is recognised and the stability icon appears, press the
button as indicated by the string “PRESS OK.” Switching from an acidic to a
basic pH may take a few more seconds to achieve stability. The actual measured
value and the second Slope% will ash on the screen. Subsequently, the icon of the
beaker pH 10.01 will appear next to the green and red beakers. This indicates
that the meter is calibrated in the alkaline eld.
14. At the end of the third calibration point, the meter will return to the measurement
mode automatically.
15. To perform a one- or two-point calibration, press the button once the rst or
second point is completed.
NOTE! Electrode calibration is an essential operation for the quality and accuracy of a
measurement. Therefore, ensure that the buffers used are new, unpolluted and at the
same temperature.
ATTENTION! Before continuing with the calibration, review the safety data sheets for
involved substances:
• Calibration buffer solutions
• Storage solution for pH electrodes
• Filling solution for the pH electrodes
Calibration with manual values
For instance, two-point calibration pH 6.79 e pH 4.65 (DIN 19267).
1. Access the setup menu for pH and select P1.1 →Custom.
2. Press the button twice to return to the measurement and position in pH
mode .
3. Press the button to enter the calibration mode.
4. Rinse the electrode with distilled water and dab gently with paper towel. Dip the
electrode in the rst pH buffer solution e.g. pH 6.79.
5. Wait for the pH value on the screen to stabilise. When the icon appears and
the value ashes, modify it using the directional buttons. Enter the correct value
(e.g. pH 6.79), as suggested by the string “ADJUST THE VALUE” and the icon .
NOTE! Check the buffer value according to the value.

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6. When the icon appears again, press the button to conrm the rst point.
The measured value will ash on the screen and then the green beaker icon
will appear.
7. Remove the electrode. Rinse with distilled water and dab gently with paper towel.
Dip the sensor in the next buffer solution (e.g., pH 4.65
8. Wait for the pH value on the screen to stabilise. When the icon appears and
the value ashes, modify it using the directional buttons. Enter the correct value
(e.g. pH 4.65), as suggested by the string “ADJUST THE VALUE” and the icon .
9. When the icon appears again, press the button to conrm the second
point. The measured value will ash on the screen and appears with the Slope%
and next to the green beaker, the red beaker icon will appear.
10. At the end of the second calibration point, the meter will automatically return to
measurement mode.
11. To perform a one-point calibration, press the button after completing the
rst point.
NOTE! When using manual temperature compensation (MTC), it is advisable to update
the value before calibrating the meter.
Performing pH measurement
1. In measurement mode, press the button and navigate to the pH parameter
indicated by the icon .
2. Connect the electrode to the pH/ORP BNC of the meter (green).
3. If the user does not use an electrode with an integrated temperature probe or an
external probe NTC 30KΩ, it is recommended to manually update the temperature
value (MTC).
4. Remove the electrode from its tube. Rinse with distilled water and dab gently with
paper towel.
5. Ensure that there are no air bubbles in the membrane bulb by stirring vertically
(similar to a clinical thermometer) and eliminate them if necessary. If any air
bubbles are detected, open the side cap to release them.
6. Immerse the electrode into the sample while gently stirring it.
7. To ensure the accuracy of a measured value, it is recommended to wait for
the measurement stability, which is indicated by the icon . When the
measurement is inaccurate, four red ashing bands will appear on
the screen.

18
PRODUCT MANUAL
1800 358 101
[e-mail]
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[phone]
[e-mail]
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646 568 5391
[e-mail]
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1 877 822 1455
[e-mail]
www.westlab.com
Australia New Zealand United StatesCanada
Example of an unstable measurement Example of a stable measurement
8. After the measurement, wash the electrode with distilled water and preserve in the
appropriate storage solution.
ATTENTION! Never store the sensors in any type of water, or dry!
9. It provides a valuable means of obtaining precise measurements, as it constantly
displays the buffers used for calibration and allows for convenient access to
calibration data and expiration date entry at any time.
Errors during calibration
Error Issue Solution
NOT STABLE The button was
pressed with an unstable
signal.
Wait for the icon
to appear to conrm
the point.
WRONG BUFFER The buffer is polluted or
not part of the recognised
families.
Ensure that the buffer is
part of the recognised
solutions and is free from
contaminants.
SLOPE OUT OF RANGE The slope of the sensor
calibration line is out of
the acceptable range 80%
to 120%.
Ensure that the slope is
within the acceptable
range.
CALIBRATION TOO LONG The calibration exceeded
the time limit: only the
points calibrated up to
that moment will be kept.
Ensure that the
calibration does not
exceed the time limit.
mV Parameter
1. In measurement mode, press the button and navigate to the mV parameter,
indicated by the icon .
2. The display will show the measurement in mV of the pH sensor.
3. To ensure the accuracy of a measured value, it is recommended to wait for
the measurement stability, which is indicated by the icon . When the
measurement is inaccurate, four red ashing bands will appear on
the screen.

19
PRODUCT MANUAL
1800 358 101
[e-mail]
www.westlab.com.au
[phone]
[e-mail]
www.westlab.co.nz
646 568 5391
[e-mail]
www.westlab.com
1 877 822 1455
[e-mail]
www.westlab.com
Australia New Zealand United StatesCanada
NOTE! This measurement is recommended to evaluate the sensor eciency.
ORP Parameter [Main Heading]
ORP sensors can be used on meter to measure the Oxide-Reduction Potential.
Connect the Redox electrode to the BNC type connector marked in green; instead, if
necessary, connect the temperature probe to the RCA/CINCH temperature connector
(always marked with a green background). It is possible to calibrate the sensor offset
by performing automatic calibration on a predened point. The unit automatically
recognises the Redox solution 475mV/25°C.
ATTENTION! The meter can correct the sensor offset by ± 75 mV.
ORP parameter setup
1. In measurement mode, press the button to access the setup menu.
2. Using the directional buttons, navigate to ORP Settings P2.0 and access the menu
by pressing the button.
3. Navigate with the and buttons to select the program to access.
The following table displays the structure of the setup menu for the ORP parameter,
including the available options and their corresponding default values for each program:
Program Description Options
Factory Default
Settings
P2.6 CALIBRATION DATA - -
P2.8 RESET SETTINGS YES - NO NO
P2.9 TEMPERATURE CAL YES - NO -
P2.6 Calibration data [sub-heading of ORP parameter setup]
Access this menu to retrieve information about the most recent calibration performed.
The display will show screens with the sensor offset value and the temperature at
which the calibration was carried out, scrolling through the relevant details.
P2.8 Reset of the ORP parameter [sub-heading of ORP parameter setup]
If the meter isn’t working accurately or incorrect calibrations are being carried out,
conrm Yes with the button return all of the ORP menu parameters to their
default settings.
P2.9 Temperature calibration [sub-heading of ORP parameter setup]
The meter is pre-calibrated for an accurate temperature reading. However, if there is a
difference between the measured and the actual temperature*, it is possible to perform
an offset adjustment of ± 5°C.
* usually due to a probe malfunction.
1. Use the directional buttons to correct the temperature offset value.
2. Conrm with the button.

20
PRODUCT MANUAL
1800 358 101
[e-mail]
www.westlab.com.au
[phone]
[e-mail]
www.westlab.co.nz
646 568 5391
[e-mail]
www.westlab.com
1 877 822 1455
[e-mail]
www.westlab.com
Australia New Zealand United StatesCanada
ORP automatic calibration
Automatic calibration with 475 mV.
1. In ORP measurement mode , press the button to enter the
calibration mode.
2. When the string “POINT ORP 475” appears on the display, the meter requires the
475 mV as a calibration point.
3. Rinse the electrode with distilled water and gently dab with paper towel. Dip the
electrode in the 475 mV Redox buffer solution.
4. To ensure the accuracy of a measured value, it is recommended to wait for
the measurement stability, which is indicated by the icon . When the
measurement is inaccurate, four red ashing bands will appear on
the screen.
5. Press the button as indicated by the string “PRESS OK.” The measured value
will ash on the screen and then beaker icon will appear on the bottom left ,
indicating that the meter is calibrated.
6. The meter will return to measurement mode.
ATTENTION! Before continuing with the calibration, review the safety data sheets for
involved substances:
• Redox standard solutions
• Storage solution for ORP electrodes
• Filling solution for the ORP electrodes
Meter Setup Menu
1. In measurement mode, press the button to access the setup menu.
2. Using the directional buttons, navigate to SETTINGS P9.0 and access the menu by
pressing the button.
3. Navigate with the and buttons to select the program to access.
The following table displays the structure of the setup menu for the general settings of
the meter. For each program, it includes the available options and their corresponding
default values.
Program Description Options
Factory Default
Settings
P9.1 TEMPERATURE U.M. °C/°F °C
P9.4 BRIGHTNESS LOW – MED –
HIGH
MED
P9.8 RESET YES – NO NO