Thermo Scientific AquaSensors AquaTrace User manual

Thermo Scientific
AquaSensors™ AquaTrace™
Trace DO System
User Guide

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Thermo Scientific AquaSensors™ AquaTrace™ Trace DO System User Guide 1
Preface
This instruction manual serves to explain the use of the Thermo Scientific
AquaTrace™ Trace Dissolved Oxygen Measurement System and is written to cover
as many applications as possible. Please do not hesitate to contact Thermo Fisher
Scientific or an authorized representative with questions or concerns.
The information presented in this instruction manual is subject to change without notice
as improvements are made, and does not represent any commitment whatsoever on the
part of Thermo Fisher Scientific.
Thermo Fisher Scientific cannot accept any responsibility for damage or malfunction
of the sensor due to improper use.
Contact Information
To contact Thermo Scientific AquaSensors Technical
Support:
Within the United States call 1.800.225.1480 or fax
978-232-6015.
Outside the United States call 978.232.6000 or fax
978.232.6031.
In Europe, the Middle East, Asia, and Africa, contact your
local authorized dealer.
Visit us on the web at: www.thermofisher.com/processwater

Safety Information
Thermo Scientific AquaSensors™ AquaTrace™ Trace DO System User Guide 2
The Thermo Scientific AquaSensors AquaTrace™
Dissolved Oxygen Measurement System shall be installed
and operated only in the manner specified. Only a skilled,
trained or authorized person should carry out installation,
setup and operation of the sensor system.
Before using the system, make sure that is connected as
specified. Failure to do so may result in permanent
damage to the system of its components.
Protection against electric shock will be achieved only by
observance of the corresponding installation rules.

Thermo Scientific AquaSensors™ AquaTrace™ Trace DO System User Guide 3
Table of Contents
1. INTRODUCTION ............................................................................................................................................ 4
1.1 General Information...................................................................................................................................... 4
1.2 Intended use........................................................................................................................................... 4
1.3 Safety Instructions....................................................................................................................................... 5
1.4 Removal from Service / Correct Disposal of the Trace DO Measurement System......................................... 5
2. PRODUCTDESCRIPTION................................................................................................................................. 6
2.1 System Description........................................................................................................................................ 6
2.2 Sensor Description........................................................................................................................................ 7
2.3 AV38 Remote Display.................................................................................................................................... 9
3. INSTALLATION............................................................................................................................................... 10
3.1 System Mounting and Installation.................................................................................................................. 10
3.2 Wiring......................................................................................................................................................... 12
4. SYSTEM OPERATION AND MAINTENANCE.................................................................................................... 13
4.1 Sensor Startup............................................................................................................................................ 13
4.2 System Shut-Down and Sensor Storage........................................................................................................ 14
4.3 System Maintenance – Cleaning................................................................................................................... 14
4.4 Sensor Maintenance – Replacing the Membrane Cap and Electrolyte.............................................................. 15
4.5 Sensor Maintenance – Trace DO System Troubleshooting.............................................................................. 16
5. SENSOR CALIBRATION.................................................................................................................................. 17
5.1 Temperature Calibration............................................................................................................................... 17
5.2 Dissolved Oxygen Calibration – Air Calibration............................................................................................... 19
5.3 Dissolved Oxygen Calibration – Zero Calibration............................................................................................ 22
5.4 Dissolved Oxygen Calibration – 1-Point Calibration ........................................................................................ 23
6. AquaTrace System Order Matrix and Accessories............................................................................................ 25
6.1 AquaTrace Trace DO System Configuration Options ...................................................................................... 25
6.2 AquaTrace System Replacement Electrolyte and Membrane Caps.................................................................. 25
6.3 AquaTrace Trace DO Specifications.............................................................................................................. 26
7. Terms and Conditions ....................................................................................................................................... 27
7.2 Terms and Conditions of Sale Continued...................................................................................................... 28

1. INTRODUCTION
1.1 General Information
The product is designed for continuous use in industrial process applications and complies with safety
regulations currently in force. Improper use could lead to hazards for the user or a third-party, and/or
adverse effects to the plant or other equipment.
Thermo FisherScientificdoes not accept any liability for damage that may arise if informationin this
manual is not followed. Therefore,the operatinginstructionsand specifications must be read and
understoodby all personsinvolved in installation and operation of this equipment.
This manual identifies safety instructions and additional information by means of the following symbols:
This symbol draws attention to safety instructionsand warnings of potential danger,
which if neglected, could result in injury to persons and/or damage to property.
This symbol identifies additional informationand instructions,which if neglected, could
lead to inefficient operation and possible loss of production.
It is recommended that this manual be made accessible to everyone who may need it as a
reference. Please contact Thermo Fisher Scientific or an authorized representative with any
questions.
1.2 Intended use
The Thermo Scientific AquaSensors AquaTrace DO System is capable of continuous monitoring of
dissolved oxygen in applications between 20 ppm and 0.1 ppb. The system also measures water
temperature.
Any other use, or use not mentioned here, that is incompatible with the technical specifications is deemed
inappropriate. The operator is solely responsible for any damage arising from such use.
Other prerequisites for appropriate use include:
Observing the instructions, notes and requirements set out in this instruction manual.
Observing all local safety regulations.
Thermo Scientific AquaSensors™ AquaTrace™ Trace DO System User Guide 4

Observing all warnings and cautions in the documentation regarding all products used in this
measurement system, including the sensor, mounting hardware, AV38 electronics and
cabling.
Observing the prescribed environmental and operational conditions.
Observing chemical compatibility with all wetted materials.
1.3 Safety Instructions
The Trace DO Measurement System should be installed and operated only
by personnel familiar with the sensor and qualified for such work.
A defective Trace DO Measurement System should be returned to Thermo
Fisher Scientific for repair or replacement. Contact Thermo Fisher Scientific to
obtain a Return Material Authorization (RMA) number.
No modifications to the Trace DO Measurement System are allowed. The
manufacturer/supplier accepts no responsibility for damage caused by unauthorized
modifications. The risk is borne entirely by the user.
1.4 Removal from Service / Correct Disposal of the Trace DO Measurement System
Removal from Service
1. Shut off the process sample connection to the AquaTrace system.
2. Disconnect the power supply to the AquaTrace system.
3. Disconnect any cable wiring from the AquaTrace analyzer’s outputs.
4. Disconnect the process connections to the AquaTrace system.
5. Remove the sensor from the flow chamber.
6. Rinse the sensor head with clean water and replace the storage cap on the end of the AquaTrace sensor.
7. Rinse the inside of the flow chamber with clean water and allow it to dry.
8. Replace the sensor inside the flow chamber.
Correct Disposal of Unit
When the Trace DO Measurement System is taken out of service, observe the local environmental
regulations for correct disposal.
Thermo Scientific AquaSensors™ AquaTrace™ Trace DO System User Guide 5

2. PRODUCTDESCRIPTION
2.1 System Description
The Thermo Scientific AquaSensors AquaTrace DO system is used for continuous measurement of dissolved oxygen. The
system is capable of measuring dissolved oxygen where the oxygen concentration is below 20 ppm but it is intended for
service in applications below 1000 ppb. The system also measures the sample temperature across its rated range.
The AquaTrace DO is a complete system that includes all components necessary for the low-level oxygen measurement. The
system consists of a low-level oxygen sensor head, a DataStick sensor body with a communication adapter, and a sample
chamber mounted to a back panel for easy installation. The system includes an AV38 remote display either mounted to the
back panel or ready for mounting at a remote location depending on how the system is configured.
The sample chamber secures the sensor in the process. It directs the sample flow onto the sensing face of the probe and
directs the outlet flow away from the sensor tip while also eliminating entrapped bubbles. This improves the sensor’s
response to changing process conditions and maximizes the accuracy of the dissolved oxygen measurement. The sample
chamber uses a union-style locking ring to secure the sensor, allowing the sensor to be inserted and removed without
twisting the sensor cable.
The AquaTrace system includes an AV38 local display that allows the operator to interface with the sensor. The AV38 allows
the operator to display the system’s measurement values, to calibrate the sensor, and to configure the sensor’s various
measurement options. The AV38 can be configured with relays and analog outputs for use in control systems and can
include host communications for network communications using one of several standard protocols. The images below
indicate panel dimensions.
AquaTrace Trace DO Measurement System
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System Specifications:
Wetted Materials.........................Sample Chamber –Acrylic, Viton, 316 Stainless Steel
Sensor – PEEK, 316 Stainless Steel, Viton, FEP
Operating Temperature..............5 to 50°C (40 to 120°F)
Maximum Pressure.....................60 psi supply
Sample Flow Rate......................50 to 400 mL/min (0.8 to 6.3 gal/hr)
Measuring Range.......................0.1 ppb to 20 ppm
Resolution ..................................0.1 ppb / 0.01 ppm
2.2 Sensor Description
The Thermo Scientific AquaSensors Trace DO sensor uses the amperometric measurement technique
to maximize lifetime in continuous industrial applications. The sensor is easily maintained and
reconditioned by replacing the convenient pre-tensioned membrane cap and electrolyte. The sensor
includes an integral temperature element that is closely coupled to the process sample to insure an
accurate measurement.
The sensor head is pre-calibrated for span and the zero is factor set. The integral electronics in the
sensor head retain calibration data and the sensor does not require a new calibration when the system
is installed, although it is recommended that a sample calibration be performed at the typical service
range to maximize accuracy during operation.
The Trace DO sensor uses the DataStick sensor system. The DataStick consists of a standard sensor
body, an interchangeable sensor head, and a communications adapter. The sensor head threads into
the front of the DataStick sensor body. The DataStick body’s internal electronics work with the sensor
head to calculate the measurement values. The communications adapter assembles into the back end
of the DataStick body and transmits the measurement data using one of several standard
communication protocols.
The sensor is designed for continuous use and has 1-inch NPT mounting threads for installation into
the sample chamber adapter. The parts of the sensor system are shown here:

Communications Adapter (MODBUS RTU supplied) plugs
into sensor body and is secured with a retaining ring
Universal DataStick Sensor Body automatically calculates
measurements based on the sensor head
1-inch NPT threads for connection to sample chamber adapter
Trace DO Sensor Head plugs into sensor body and is secured
with a retaining ring
Screw-on membrane cap
Sensor Highlights:
0.1 ppb to 20 ppm Measurement Ranges
Calibration stored in Sensor (Does not require recalibration after connection to
Analyzer/Controller)
0.1 ppb Resolution
Fast Response
Simple membrane and electrolyte replacement
Provides measurement, calibration, configuration and diagnostic functions without
Analyzer/Controller
Works with AV38 for local display, current output data reporting, and relay control
Thermo Scientific AquaSensors™ AquaTrace™ Trace DO System User Guide 8
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