Swann AMU-II Oxytrace User manual

AMU-II Oxytrace
A-96.150.541 / 111223
AMU-II Oxytrace
Operator’s Manual

© 2023, Swan Analytische Instrumente AG, Switzerland, all rights reserved.
This manual applies to firmware V1.00 and higher.
The information contained in this document is subject to change without notice.
Customer Support
Swan and its representatives maintain a fully trained staff of technical specialists around
the world. For any technical question, contact your nearest Swan representative, or the
manufacturer:
Swan Analytische Instrumente AG
Studbachstrasse 13
8340 Hinwil
Switzerland
Internet: www.swan.ch
E-mail: [email protected]
Document Status
Title: AMU-II Oxytrace Operator’s Manual
ID: A-96.150.541
Revision Issue
00 December 2023 First edition

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AMU-II Oxytrace
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Table of Contents
1. Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Warning Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2. General Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1. Description of the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2. Single Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.1 AMU-II Oxytrace Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.2 Sensor OXYTRACE G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.3 QV-Flow PMMA OTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.4 B-Flow SS316L OTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1. Mounting of the AMU-II Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2. Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3. Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4. Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.5. Swan Flow Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.6. Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7. Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7.1 Alarm Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7.2 Relay 1 and 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.8. Signal Output 1 and 2 (Current Outputs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.9. Interface Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.9.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.9.2 USB Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.9.3 RS485 Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.9.4 HART Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.10. RS232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4. Instrument Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1. Establish Sample Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2. Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.1. Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2. Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3. Software Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.4. Changing Parameters and values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

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6. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.1. Maintenance Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2. Stop of Operation for Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.3. Maintenance of the Oxygen Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3.1 Electrolyte exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3.2 Clean Swansensor Oxytrace G and Flow Cell . . . . . . . . . . . . . . . . . . . . . . . . 34
6.4. Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.5. Zero Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.6. Quality Assurance of the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.6.1 Activate Swan Quality Assurance Procedure . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.6.2 Pre-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.6.3 Connect the Sample Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.6.4 Carry Out Comparison Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.6.5 Completion of the Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.7. Longer Stop of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7. Error List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8. Program Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.1. Messages (Main Menu 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.2. Diagnostics (Main Menu 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.3. Maintenance (Main Menu 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.4. Operation (Main Menu 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.5. Installation (Main Menu 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9. Program List and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
1 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
2 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10. Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
11. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

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Safety Instructions
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Operator’s Manual
This document describes the main steps for instrument setup, opera-
tion and maintenance.
1. Safety Instructions
General The instructions included in this section explain the potential risks
associated with instrument operation and provide important safety
practices designed to minimize these risks.
If you carefully follow the information contained in this section, you
can protect yourself from hazards and create a safer work environ-
ment.
More safety instructions are given throughout this manual, at the re-
spective locations where observation is most important. Strictly fol-
low all safety instructions in this publication.
Target
audience
Operator: Qualified person who uses the equipment for its intended
purpose.
Instrument operation requires thorough knowledge of applications,
instrument functions and software program as well as all applicable
safety rules and regulations.
OM location Keep the Operator’s Manual in proximity of the instrument.
Qualification,
training
To be qualified for instrument installation and operation, you must:
read and understand the instructions in this manual as well as
the Material Safety Data Sheets.
know the relevant safety rules and regulations.

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Safety Instructions
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1.1. Warning Notices
The symbols used for safety-related notices have the following
meaning:
DANGER
Your life or physical wellbeing are in serious danger if such
warnings are ignored.
Follow the prevention instructions carefully.
WARNING
Severe injuries or damage to the equipment can occur if such
warnings are ignored.
Follow the prevention instructions carefully.
CAUTION
Damage to the equipment, minor injury, malfunctions or incorrect
process values can be the consequence if such warnings are ig-
nored.
Follow the prevention instructions carefully.
Mandatory
signs
The mandatory signs in this manual have the following meaning:
Safety goggles
Safety gloves

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Safety Instructions
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Warning signs The warning signs in this manual have the following meaning:
Electrical shock hazard
Corrosive
Harmful to health
Flammable
General warning
Attention

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Safety Instructions
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1.2. General Safety Regulations
Legal
requirements
The user is responsible for proper system operation. All precautions
must be followed to ensure safe operation of the instrument.
Spare parts
and
disposables
Use only official Swan spare parts and disposables. If other parts are
used during the normal warranty period, the manufacturer’s warranty
is voided.
Modifications Modifications and instrument upgrades shall only be carried out by
an authorized service technician. Swan will not accept responsibility
for any claim resulting from unauthorized modification or alteration.
WARNING
Mains voltage
Electrical shock hazard
Maintenance on electronic parts shall be performed by
authorized personnel only.
Whenever maintenance on electronic parts is required, discon-
nect instrument power and power of devices connected to.
– relay 1,
– relay 2,
– alarm relay
If proper operation is no longer possible, the instrument must
be disconnected from all power lines, and measures must be
taken to prevent inadvertent operation.

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Product Description
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2. Product Description
2.1. Description of the System
Application The AMU-II Oxytrace is used to measure low levels of oxygen in
high-purity water. Especially in power plant water cycles (e.g. feed-
water), a very low level of oxygen is needed to prevent corrosion.
Measuring
principle
Clark principle:
The sensor consists of one noble metal electrode (e.g. platinum or
gold), a reference electrode (mostly Ag/AgCl) and optionally a metal
guard electrode.
The Clark-type electrode is the most widely used oxygen sensor for
measuring oxygen dissolved in a liquid. The basic principle is that
there is a cathode and an anode submersed in an electrolyte and a
voltage is applied between the two parts. Oxygen enters the sensor
through a permeable membrane by diffusion, and is reduced at the
cathode according to
O2 + 4e- + 2 H2O --> 4 OH-
This reaction creates a measurable current. There is a linear correla-
tion between the oxygen concentration and the electrical current.
The guard electrode is on the same voltage level as the cathode but
there is no current measurement. Oxygen which diffuses from the
electrolyte to the cathode is consumed by the guard electrode. As a
consequence, residual oxygen in the electrolyte will no more disturb
the measurement signal and the response time to low oxygen levels
will be shorter.
Temperature
compensation
The measuring signal depends on temperature, but is automatically
compensated to 25 °C. The sample temperature is determined con-
tinuously by a temperature sensor inside the oxygen electrode.

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Product Description
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Signal
outputs
Two signal outputs programmable for measured values (freely
scalable, linear, bilinear, log) or as continuous control output (control
parameters programmable).
Current loop: 0/4–20 mA
Maximal burden: 510 Ω
Relays Two potential-free contacts programmable as limit switches for
measured values, controllers or timer with automatic hold function.
Maximum load: 100 mA/50 V
Alarm relays Two potential-free contacts (one normally open and one normally
closed). Summary alarm indication for programmable alarm values
and instrument faults.
Normally open contact: closed during normal operation, open on
error and power loss.
Normally closed contact: open during normal operation, closed on
error and power loss
Maximum load: 100 mA / 50 V
Input One input for potential-free contact to freeze the measuring value or
to interrupt control in automated installations (hold function or remote
off).
Communica-
tion interface
(option)
RS485 interface (galvanically separated) for communication via
Modbus or Profibus DP
USB interface for logger download
HART interface
RS232 interface for logger download with HyperTerminal
Safety
features
No data loss after power failure. All data is saved in non-volatile
memory. Overvoltage protection of inputs and outputs. Galvanic sep-
aration of measuring inputs from signal outputs.