ABB ADS420 User manual

—
ABB MEASUREMENT & ANALYTICS | OPERATING INSTRUCTION | OI/ADS420-EN REV. B
ADS420
Optical dissolved oxygen sensor
Measurement made easy
Introduction
The ADS420 sensor is a rugged, reliable instrument
designed to deliver accurate dissolved oxygen (DO)
data across a wide measurement range, using the
latest optical technology for DO measurement.
The probe is designed for use with ABB multi-input
transmitters, such as the AWT420 and AWT440,
which feature 'hot-plugging' capability.
Hot-plugging lets new or replacement sensors to be
connected without needing to power down the
transmitter.
When used in conjunction with the optional EZClean
compressed air supply unit (connected to an ABB
adapter nozzle or T-piece), a schedule can be
configured to provide automatic in-situ cleaning of
the sensor.
For more information
Further publications and publications for the
associated AWT420 and AWT440 transmitters are
available for free download from:
www.abb.com/measurement
or by scanning this code:
Search for or click on

Optical dissolved oxygen sensor 









 
Multi-input transmitter
 

 
Multi-input transmitter
 

Sensor accessories 
—
ADS420
dissolved oxygen sensor

2ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
Contents
1 Health & Safety ..............................3
Document symbols .................................3
Safety precautions .................................3
Potential safety hazards ............................3
 .......................3
Safety standards ...................................3
Product symbols ...................................3
Product recycling and disposal (Europe only) ........3
Information on RoHS Directive 2011/65/EU (RoHS II) .3
Cybersecurity ..................................... 4
2 System overview ............................5
ADS420 cable attached .............................5
ADS420 cable detached.............................5
3 Sensor setup menu ..........................6
4 Calibration ..................................7
Calibrate menu.....................................7
1-Point calibration (water-saturated air) ............ 8
2-Point calibration (100 % and 0 % saturation) ......10
Abort calibration ..................................12
Calibration timings................................12
Stability period ................................12
Slow sensor response ..........................12
Calibration troubleshooting .......................12
Slow sensor calibration or no response to
dissolved oxygen changes ......................12
5 Maintenance ...............................13
Cleaning the SmartCap ............................13
Cleaning the lens ..................................13
Cleaning the sensor body ..........................14
6 Diagnostics ................................15
S(n): PT failure.....................................15
S(n): D.O. Conc Meas Error .........................15
S(n): %Sat Meas Error..............................15
S(n): Calibrating ...................................15
S(n): Internal Comms Error .........................15
S(n): Cap Removed ................................15
S(n): Cal Failed ....................................16
S(n): User Cal Expired ..............................16
S(n): Factory Cal Expired ...........................16
S(n): Sensor Warm-up..............................16
S(n): Sensor Warning ..............................16
S(n): Cap Expired ..................................16
S(n): Replace Cap ..................................17
7 Spares .....................................18
EZLink extension cables ...........................18
SmartCap spare parts .............................18
Shroud spare parts ................................18

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 3
1 Health & Safety
Document symbols
Symbols that appear in this document are explained below:
WARNING
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
NOTICE
NOTICE is used to address practices not related to physical
injury.
‘Note’ indicates operator tips, particularly useful information or
important information about the product or its further uses.
‘Note’ does not indicate a dangerous or harmful situation.
Safety precautions
Be sure to read, understand and follow the instructions
contained within this manual before and during use of the
equipment. Failure to do so could result in bodily harm or
damage to the equipment.
WARNING
Installation, operation, maintenance and servicing must be
performed:
• by suitably trained personnel only
• in accordance with the information provided in this
manual
• in accordance with relevant local regulations
Potential safety hazards
ADS420 sensor – electrical
The sensor operates on 24 V DC supplied from the transmitter.
There are no hazardous voltages present.
Safety standards
This product has been designed to satisfy the requirements of
IEC61010-1:2010 3rd edition 'Safety Requirements for
Electrical Equipment for Measurement, Control and Laboratory
Use' and complies with US NEC 500, NIST and OSHA.
Product symbols
Symbols that may appear on this product are shown below:
Direct current supply only.
This symbol identifies a risk of chemical harm and
indicates that only individuals qualified and trained to
work with chemicals should handle chemicals or
perform maintenance on chemical delivery systems
associated with the equipment.
This symbol indicates the need for protective eye
wear.
This symbol indicates the need for protective hand
wear.
Recycle separately from general waste under the
WEEE directive.
Product recycling and disposal (Europe only)
ABB is committed to ensuring that the risk of any
environmental damage or pollution caused by any of
its products is minimized as far as possible. The
European Waste Electrical and Electronic Equipment
(WEEE) Directive that initially came into force on
August 13 2005 aims to reduce the waste arising from
electrical and electronic equipment; and improve the
environmental performance of all those involved in
the life cycle of electrical and electronic equipment. In
conformity with European local and national
regulations, electrical equipment marked with the
above symbol may not be disposed of in European
public disposal systems after 12 August 2005.
NOTICE
For return for recycling, please contact the equipment
manufacturer or supplier for instructions on how to return
end-of-life equipment for proper disposal.
Information on RoHS Directive 2011/65/EU
(RoHS II)
ABB, Process Automation, Measurement & Analytics,
UK, fully supports the objectives of the RoHS II
directive. All in-scope products placed on the market
by PAMA UK on and following the 22nd of July 2017, will
be compliant to the RoHS directive, 2011/65/EU.

4ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
…1 Health & Safety
Cybersecurity
This product is designed to be connected to and to
communicate information and data via a network interface. It is
operator’s sole responsibility to provide and continuously
ensure a secure connection between the product and your
network or any other network (as the case may be). Operator
shall establish and maintain any appropriate measures (such as
but not limited to the installation of firewalls, application of
authentication measures, encryption of data, installation of
anti-virus programs, etc.) to protect the product, the network,
its system and the interface against any kind of security
breaches, unauthorized access, interference, intrusion, leakage
and/or theft of data or information. ABB and its affiliates are
not liable for damages and/or losses related to such security
breaches, any unauthorized access, interference, intrusion,
leakage and/or theft of data or information.

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 5
2 System overview
ADS420 cable attached
ADS420 sensor components (cable attached) are shown in
Figure 1:
ADS430xxxxxx
Figure 1 ADS420 sensor components (cable attached)
Table 1 Sensor components (cable attached)
Part Description
AEZLink™digital sensor connector
BShroud
CSmartCap (supplied unfitted in sealed factory-supplied container)
Note. The SmartCap serial number is programmed on the memory
chip inside the SmartCap.
DSensor body (including temperature sensor)
E
ADS420 cable detached
ADS420 sensor components (cable detached) are shown in
Figure 2:
Figure 2 ADS420 sensor components (cable detached)
Table 2 Sensor components (cable detached)
Part Description
AEZLink digital sensor connector
BShroud
CSmartCap (supplied unfitted in sealed factory-supplied container)
Note. The SmartCap serial number is programmed on the memory
chip inside the SmartCap.
DSensor body (including temperature sensor)

6ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
3 Sensor setup menu
Dissolved oxygen
Menu Comment Default
Tag 
on the Operator Pages.

Measurement Type Select the required probe type:
• Dissolved Oxygen / % Saturation
Note. If a change is made the I/O sources are reset.
Dissolved Oxygen
Units Select the measurement units:
• mg/L / ppm
ppm
PV Resolution Select the PV Resolution:
• Normal / High
Normal
Range High Set the span value in Chart and Bargraph views. 
Range Low Set the zero value in Chart and Bargraph views. 
Filter Type Select the signal filtering type:
• None / Low / Medium / High
None
Salinity Unit Select the required salinity units:
• PSU (Practical Salinity Units) or ppt (parts-per-thousand).
PSU
Salinity Correction Required when monitoring water containing high quantities of dissolved salts:
• 
• 

Pressure Unit Select the required barometric pressure units:
• mbar / mmHg
mbar
Barometric Pressure Barometric pressure compensation.

If the barometric pressure is unknown, leave at the default sea-level value of


Slope Limit  N/A
Offset Limit  N/A
Reset To Defaults Select to reset all Sensor Setup parameters to their default values. N/A

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 7
4 Calibration
This section describes how to calibrate the sensor and involves
measuring the sensor's sensitivity to oxygen by exposing the
sensor to water-saturated air.
Calibrations are initiated via the Cal prompt displayed on
Operator pages or via the Calibrate and Advanced menu
items on the Access Level
instructions OI/AWT420 for all transmitter menu options.
Note.
• Do not perform a calibration until the sensor and transmitter
are installed and ready for operation.
• Before removing the sensor for calibration purposes, set the
currents outputs and alarms to Hold (enabled via the
Operator Menu/Manual Hold function).
• After calibration and sensor replacement, reset the currents
Calibrate menu below.
Calibrate menu
Calibrate
Menu
Exit Select
Used to calibrate the sensor.
Access to the Calibrate menu is permitted via the Calibrate and Advanced levels only.
Note. During calibration, current outputs and alarms are set to Hold automatically if
Hold Outputs is enabled (see below).
Menu Comment Default
S1 (to 4) :DO Select the optical dissolved oxygen sensor to calibrate.
Probe Calibration
Calibration Type
 
 
calibration in an oxygen-depleted solution, e.g. sodium sulfite (NaSO).
Hold Outputs Enable/disable the Hold Outputs function. If enabled, the current outputs and alarm functions are
held during calibrations.
Enabled

8ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
…4 Calibration
1-Point calibration (water-saturated air)
1 Using a customer-supplied calibration pot, place a wet
sponge at the bottom of the container.
2 Ensure the probe and sensing element are completely dry. If
necessary use a paper towel to remove any water or debris
from the sensor or sensing element.
3 Slide sensor into calibration chamber until the sensing
element is approximately 25 mm (1 in) above water-saturated
sponge.
4 Allow 5 to 10 minutes for temperature stabilization prior to
continuing the calibration procedure.
NOTICE
• Do not leave the sensor in the calibration chamber for

form on the surface of the sensing element, producing
false low readings after calibration.
• If condensation occurs, remove the sensor, thoroughly dry
the sensing element, probe and thermistor before
performing the calibration procedure.
• Ensure the calibrations are performed in a vented but
enclosed chamber, to prevent pressure building up in the
container.
• Minimize ambient airflow across the sensor head during
the calibration.
5 At the transmitter perform a 1-point calibration from an
Operator page as follows:
CAL
2014–08–20
10:34:52
7.62
25 °C
ppm
Dissolved Oxygen
6 Press the key (below the Cal prompt).
The Calibrate page is displayed:
Calibrate
Menu
Exit Select
7 Press the key (below the Select prompt).
The Calibrate page is displayed with all available sensors
shown:
Calibrate
S1: DO
Back Select
8 Use the / keys to select the sensor to be calibrated
and press the key (below the Select prompt).
The Calibration Type page is displayed:
S1: DO
Next Edit
Calibration Type
1-Point Cal

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 9
9 If 1-Point Cal is displayed, go to step 12.
If 1-Point Cal is not displayed, press the key
(below the Edit prompt).
The Calibration Type selection page is displayed:
Calibration Type
1-Point Cal
2-Point Cal
Cancel OK
10 Use the / keys to select 1-Point Cal and press the
key (below the OK prompt).
The Calibration Type page is displayed:
S1: DO
Next Edit
Calibration Type
1-Point Cal
11 Press the key below the Next prompt).
The Calibrate/Start Span Cal? page is displayed:
Calibrate
Start Span Cal?
Place in 100 % Sat
Abort Continue
12 Press the key (below the Continue prompt).
The Calibrate page is displayed:
Calibrate
PV 98.26 %
Tmp 25.22 °C
Setting-Please Wait
Abort
13 When span calibration is complete, a results page is
displayed:
Calibrate
PV 98.98 %
Tmp 24.90 °C
Offset 0.045
Slope 1.054
Exit
In the event of a calibration failure, the message Calibration
Failed is displayed with an indication of the reason for
failure, for example ‘Result Out Of Bounds’.
14 Press the key (below the Exit prompt).
The Calibrate page is displayed:
Calibrate
S1: DO
Back Select
15 Press the key (below the Back prompt).
The Calibrate page is displayed:
Calibrate
Menu
Exit Select
16 Press the key (below the Exit prompt) to return to the
Operator page.

10 ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
…4 Calibration
2-Point calibration (100 % and 0 % saturation)
Note. This calibration procedure requires 60 mL (2.0 US fl oz)
of fresh sodium sulfite solution.
1 Using a customer-supplied calibration pot, place a wetted
sponge at the bottom of the container.
2 Ensure the probe and sensing element are completely dry. If
necessary use a paper towel to remove any water or debris
from the probe or sensing element.
3 Slide probe into calibration chamber until the sensing
element is approximately 25 mm (1 in) above water-saturated
sponge.
4 Allow 5 to 10 minutes for temperature stabilization prior to
continuing the calibration procedure.
NOTICE
• Do not leave the probe in the calibration chamber for

form on the surface of the sensing element, producing
false low readings after calibration.
• If condensation occurs, remove the probe, thoroughly dry
the sensing element, probe and thermistor before
performing the calibration procedure.
• Ensure the calibrations are performed in a vented but
enclosed chamber, to prevent pressure building up in the
container.
• Minimize ambient airflow across the sensor head during
the calibration.
5 At the transmitter perform a 2-point calibration from an
Operator page as follows:
CAL
2014–08–20
10:34:52
7.62
25 °C
ppm
Dissolved Oxygen
6 Press the key (below the Cal prompt).
The Calibrate page is displayed:
Calibrate
Menu
Exit Select
7 Press the key (below the Select prompt).
The Calibrate page is displayed with all available sensors
shown:
Calibrate
S1: DO
Back Select
8 Use the / keys to select the probe to be calibrated and
press the key (below the Select prompt).
The Calibration Type page is displayed:
S1: DO
Next Edit
Calibration Type
2-Point Cal

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 11
9 If 2-Point Cal is displayed, go to step 11.
If 2-Point Cal is not displayed, press the key (below the
Edit prompt).
The Calibration Type selection page is displayed:
Calibration Type
1-Point Cal
2-Point Cal
Cancel OK
10 Use the / keys to select 2-Point Cal and press the
key (below the OK prompt).
The Calibration Type page is displayed:
S1: DO
Next Edit
Calibration Type
2-Point Cal
11 Press the key below the Next prompt).
The Calibrate/Start Span Cal? page is displayed:
Calibrate
Start Span Cal ?
Place in 100 % Sat
Abort Continue
12 Press the key (below the Continue prompt).
The Calibrate page is displayed:
Calibrate
PV 98.26 %
Tmp 25.22 °C
Setting-Please Wait
Abort
13 When span calibration is complete, the Calibrate/Start Zero
Cal? page is displayed:
Calibrate
Start Zero Cal?
Place in 0 % Sat
Abort Continue
14 Remove the sponge wafer from the calibration pot.
15 Fill calibration chamber with fresh sodium sulfite solution,
leaving at least 13 mm (0.5 in) between the surface of the
sensing element and the bottom of the chamber.
16 Allow 5 to 10 minutes for temperature stabilization prior to
continuing the calibration procedure.
17 Press the key (below the Continue prompt).
The Calibrate page is displayed:
Calibrate
PV 2.31 %
Tmp 25.32 °C
Setting-Please Wait
Abort

12 ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
…4 Calibration
18 When zero calibration is complete, a results page is
displayed:
Calibrate
PV 2.31 %
Tmp 25.40 °C
Offset 0.041
Slope 0.954
Exit
19 Press the key (below the Exit prompt).
The Calibrate page is displayed:
Calibrate
S1: DO
Back Select
20 Press the key (below the Back prompt).
The Calibrate page is displayed:
Calibrate
Menu
Exit Select
21 Press the key (below the Exit prompt) to return to the
Operator page.
22 Once the calibration is complete, remove the sensor from
the chamber and rinse thoroughly to remove all of the
sodium sulfite.
Abort calibration
A calibration is aborted by pressing the key below the Abort
prompt displayed on the Calibrate pages (refer to the
transmitter Operating Instructions OI/AWT420).
The Calibration Log displays the message Cal Aborted
to OI/AWT420 for Calibration Log entries.
Calibration timings
Stability period
The temperature and concentration readings are monitored for
up to 10 minutes until a stable reading is achieved. When
stability is achieved, the calibration (slope and offset) values
are determined.
Slow sensor response
If the output from the sensor does not stabilize during the
Stability Period the calibration is not accepted and a Cal Failed
diagnostic is displayed, the Calibration Log is updated with a
Cal Failed message.
Calibration troubleshooting
Slow sensor calibration or no response to dissolved oxygen
changes
1 Check sensor configuration/recalibrate sensor.
If the fault persists:
2 Maintenance on page
13.
If the fault persists:
3 Spares on page 18.
If the fault persists:
4 Replace the sensor.

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 13
5 Maintenance
Cleaning the SmartCap
1 Remove the sensor from the process.
Referring to Figure 3:
2 Unscrew the shroud Afrom the sensor body B.
3 Rinse SmartCap Cwith clean water from a spray bottle.
4 Gently wipe SmartCap Cwith a soft-bristled brush or, if
biofouling is present, a soft cloth.
If necessary, use a grease remover to remove grease.
5 Refit shroud Aby screwing it onto the sensor body B.
C
A
B
Figure 3 Cleaning the SmartCap
Cleaning the lens
1 Isolate the transmitter and remove the sensor from the
process.
Referring to Figure 4:
2 Unscrew the shroud Afrom the sensor body B.
3 Grip the SmartCap Cbetween your thumb and forefinger
and carefully slide it off the sensor D.
NOTICE
• Do not touch the end of the SmartCap C.
• Do not allow moisture or atmospheric humidity inside
SmartCap C.
• Do not wet the lens area Ewith water or any solution.
Use only the supplied lens cloth for cleaning.
4 Gently wipe the lens Ewith a lens cloth (not supplied).
5 Refit the shroud Aby screwing it securely onto the sensor
body B.
C
B
A
D
E
Figure 4 Cleaning the optical lens

14 ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
…5 Maintenance
Cleaning the sensor body
Note. Make sure that the shroud Ais installed tightly before
you start to clean the sensor body.
1 Isolate the transmitter and remove the sensor from the
process.
Referring to Figure 5:
2 Gently scrub the shroud Aand the sensor body Bwith a
soft-bristled brush or a nylon dish scrubber.
If it is necessary, use a grease remover to remove grease or
other matter from the sensor body, or soak in vinegar and
deionized water to remove mineral deposits or extensive
fouling.
Figure 5 Cleaning the sensor body

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 15
6 Diagnostics
The table below shows sensor-specific icon types, diagnostic
messages and possible causes/suggested remedial action.
Note.
• The diagnostic icons in the following tables conform to
NAMUR 107.
• For transmitter-specific diagnostics messages, refer to
OI/AWT420.
NAMUR 107 diagnostic icons
Failure Check
function
Out of
specification
Maintenance
required
Process value
invalid due to
malfunction in
sensor or
transmitter
Process value
temporarily invalid
due to specified
action
Process value
unreliable due to
sensor operating
outside specified
range/limits
Process value valid

required to correct
operational
conditions
S(n): PT failure
Diagnostic message
S(n): PT failure
Cause
The measurement taken from the temperature sensor is invalid
indicating that the temperature sensor has failed, or the
associated connections are either open-circuit or short-circuit.
Recovery action
1 Visually inspect the sensor/temperature sensor for signs of
damage. A damaged sensor must be replaced.
2 Cycle the power to the transmitter.
3 If the failure persists, contact the local service organization.
S(n): D.O. Conc Meas Error
Diagnostic message
S(n): D.O. Conc Meas Error
Cause
The DO sensor cannot provide a valid dissolved oxygen
measurement due to a sensor error.
Recovery action
1 Cycle the power to the sensor.
2 If the failure persists, contact the local service organization.
S(n): %Sat Meas Error
Diagnostic message
S(n): %Sat Meas Error
Cause
The DO sensor cannot provide a valid % saturation
measurement due to a sensor error.
Recovery action
1 Cycle the power to the sensor.
2 If the failure persists, contact the local service organization.
S(n): Calibrating
Diagnostic message
S(n): C alib ra t in g
Cause
Sensor calibration in progress.
Recovery action
This diagnostic clears when the calibration is complete.
S(n): Internal Comms Error
Diagnostic message
S(n): Internal Comms Error
Cause
The DO sensor cannot provide a valid dissolved oxygen
measurement due to an error in the communication between
the sensor and the SmartCap.
Recovery action
1 Make sure that the SmartCap is installed and correctly
seated.
S(n): Cap Removed
Diagnostic message
S(n): Cap Removed
Cause
The SmartCap has been removed from the sensor or is not
being recognized. A valid measurement cannot be made.
Recovery action
1 Make sure that the SmartCap is installed correctly.

16 ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
…6 Diagnostics
S(n): Cal Failed
Diagnostic message
S(n): Cal Failed
Cause
The most recent sensor calibration has failed, calibration
coefficients have not been updated, and the previous values
continue to be applied.
Recovery action
1 Make sure that the sensor is clean and fully submerged in the
solution.
2 Do the calibration again.
3 If the failure persists, consider replacing the sensor.
S(n): User Cal Expired
Diagnostic message
S(n): User Cal Expired
Cause
Recalibration of the DO sensor is required. The sensor
deteriorates over time, and recalibration is necessary to
maintain accuracy.
Recovery action
1 Perform a calibration.
S(n): Factory Cal Expired
Diagnostic message
S(n): Factory Cal Expired
Cause
Recalibration of the DO sensor is required. The sensor
deteriorates over time, and recalibration is necessary to
maintain accuracy.
Recovery action
1 Perform a calibration.
S(n): Sensor Warm-up
Diagnostic message
S(n): Sensor Warm-up
Cause
The DO sensor is warming up and cannot provide a valid DO
measurement until the internal electronics have stabilized.
Recovery action
This diagnostic clears when the internal electronics have
stablized.
If the diagnostic persists, contact the local service
organization.
S(n): Sensor Warning
Diagnostic message
S(n): Sensor Warning
Cause
PV measured from the DO sensor but does not meet normal
quality criteria. The sensor has sustained moderate damage, or
the recommended lifespan has been reached
Recovery action
1 Visually inspect the sensor for signs of damage.
2 If the sensor appears to be in good condition and is within
its recommended lifespan, it may help to clean the sensor
and the optical lens.
3 If there are sign of damage or the diagnostic persists,
contact the local service organization.
S(n): Cap Expired
Diagnostic message
S(n): Cap Expired
Cause
The SmartCap in the DO sensor has reached or exceeded its
expiry date. The SmartCap may continue to operate but its
accuracy degrades and cannot be guaranteed to meet
specification.
Recovery action
1 Replace the SmartCap.

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 17
S(n): Replace Cap
Diagnostic message
S(n): Replace Cap
Cause
The SmartCap in the DO sensor reaches its expiry date within 4
weeks. After its expiry date, the SmartCap may continue to
operate, but its accuracy degrades and cannot be guaranteed
to meet specification.
Recovery action
1 Replace the SmartCap.

18 ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B
7 Spares
EZLink extension cables
Part number Description
  
  

  








SmartCap spare parts
Part number Description
 SmartCap replacement kit
Shroud spare parts
Part number Description
 Shroud replacement kit

ADS420 | DISSOLVED OXYGEN SENSOR | OI/ADS420-EN REV. B 19
Acknowledgements
• EZLink is a trademark of ABB Limited.

OI/ADS420-EN Rev. B 01.2023
—
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