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.

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Product Description
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2.2. Single Components
2.2.1 AMU-II Oxytrace Transmitter
General Electronics housing:
Protection degree:
Ambient temperature:
Humidity:
Display:
Dimensions:
Cutout size
Weight:
Noryl® resin
up to IP54 (front)
-10 to +50 °C
10–90% rel., non condensing
backlit LCD, 75 x 45 mm
96 x 96 x 85 mm
92 x 92 mm (DIN IEC 61554:2002-08)
0.30 kg
Power supply AC variant:
DC variant:
Power consumption:
100–240 VAC (±10%)
50/60 Hz (±5%)
10–36 VDC
max. 3 VA
Sensor type Clark-type electrode.
Measuring
range
Range
0.01–9.99 ppb
10–199.9 ppb
200–1999 ppb
2–20 ppm
0–200 % saturation
Resolution
0.01 ppb
0.1 ppb
1 ppb
0.01 ppm
0.1%
Automatic range switching.
Sample flow
measurment
with digital SWAN sample flow sensor

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Product Description
12
2.2.2 Sensor OXYTRACE G
Sensor for the measurement of dissolved oxygen in ultra pure water.
Precise oxygen measuring cell with integrated temperature sensor
and guard electrode for faster initial response time after maintenance.
100
59
31.9
38.3
Technical data Clark oxygen electrode
Cathode gold, anode silver, guard silver
Zero current-free electrode system
Robust 25 µm fluoropolymer diaphragm
Temp. sensor NT5K
Measuring
range
0–20 ppm O2 (25 °C) or
0–200% saturation
Accuracy 0,3% if calibration temperature = measuring temperature
1,5% at ±10 °C deviation to cal. temperature
Precision
Response time
Minimal flow
Pressure
resistance
Operating
temp.
±1% of reading or ±0.15 ppb
t90 < 30 seconds (rising concentration)
50 cm/s
3 bar
max. 50 °C
Material
Protection
Weight
shaft: polyacetal copolymer
membrane: fluoropolymer
IP 68
150 g

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Product Description
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2.2.3 QV-Flow PMMA OTG
Flow cell Flow cell made of acrylic glass with integrated flow sensor.
Sample temp. max. 50 °C
Inlet pressure max. 1 bar
Outlet pres-
sure
Pressure free
Sample flow 6–25 l/h
Process con-
nection inlet
Swagelok connection for 1/4” tube
Outlet SERTO angle for 6 mm flexible tube
Dimensions see picture below
217.7 178.5 164 138
80
21 38
8
62
5.3

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Product Description
14
2.2.4 B-Flow SS316L OTG
Flow cell B-Flow SS316L OTG is made of stainless steel, comes without a
flow sensor and can be used for higher operating pressures and
temperatures.
Operating
temp.
-10 to +130 °C
Sensor max. 50 °C
Operating
pressure
max. 5 bar at 130 °C
Sensor max. 3 bar
Flow cell
connection
2x female thread 1/8" ISO
Dimensions see picture below
128.6
126.1
99.5
40
52

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Installation
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3. Installation
3.1. Mounting of the AMU-II Transmitter
Transmitter
dimensions
96.0 mm / 3.78"
96.0 mm / 3.78"
85.0 mm / 3.35"
78.0 mm / 3.07"
89.8 mm / 3.54"

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Installation
16
Cutout
dimensions
92 mm / 3.62"
92 mm / 3.62"

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Installation
17
3.2. Electrical Connections
Connection
diagram
CAUTION
Use only the terminals shown in this diagram, and only for the
mentioned purpose. Use of any other terminals will cause short
circuits with possible corresponding consequences to material
and personnel.

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Installation
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3.3. Power Supply
CAUTION
Do not apply power to the transmitter until all electrical
connections have been made.
Installation
requirements
The installation must meet the following requirements:
Mains cable according to standards IEC 60227 or IEC 60245;
flammability rating FV1
Mains equipped with an external switch or circuit-breaker
– near the instrument
– easily accessible to the operator
– marked as interrupter for AMU-II Oxytrace
3.4. Sensor
Terminals: see Connection diagram, p. 17.
Sensor settings: see Instrument Setup, p. 25.
3.5. Swan Flow Meter
Terminals: see Connection diagram, p. 17.
A
B
C
Pluggable terminal
block
Phase/(+) conductor
Neutral/(-) conductor
A
B
C

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Installation
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3.6. Input
Note: Use only potential-free (dry) contacts.
Terminals 16/8
For programming see Program List and Explanations, p. 53.
3.7. Relay Contacts
3.7.1 Alarm Relay
Note: Max. load 100 mA/50 V
Alarm output for system errors. For error codes see Error List, p. 44.
3.7.2 Relay 1 and 2
Note: Max. load 100 mA/50 V
Terminals 3/4: Relay 1
Terminals 5/6: Relay 2
For programming see Program List and Explanations, p. 53,
Installation menu.
Terminals Description
NC
Normally
Closed
9/10 Active (opened) during normal
operation.
Inactive (closed) on error and loss of
power.
NO
Normally
Open
1/2 Active (closed) during normal
operation.
Inactive (opened) on error and loss of
power.

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Installation
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3.8. Signal Output 1 and 2 (Current Outputs)
Note: Max. burden 510 Ω
If signals are sent to two different receivers, use signal isolator
(loop isolator).
Signal output 1: Terminals 12 (+) and 11 (-)
Signal output 2: Terminals 13 (+) and 11 (-)
For programming see Program List and Explanations, p. 53,
Installation menu.