Swan Analytical Instruments AMU Oxytrace User manual

AMU Oxytrace
Version 6.20 and higher
A-96.250.541 / 230320
Operator’s Manual

© 2019, SWAN ANALYTISCHE INSTRUMENTE AG, Switzerland, all rights reserved
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 Oxytrace Operator’s Manual
ID: A-96.250.541
Revision Issue
00 January 2008 First Edition
01 May 2019 Update to firmware V6.20

AMU Oxytrace
A-96.250.541 / 230320 1
Table of Contents
1. Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Warning Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. General Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1. Description of the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2. Single Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 AMU Oxytrace Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Sensor OXYTRACE G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.3 QV-Flow PMMA OTG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.4 B-Flow SS316L OTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3. Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1. Installation Check List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2. Dimensions of the AMU Transmitter. . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Install the Swansensor Oxytrace G . . . . . . . . . . . . . . . . . . . . . . . 16
3.4. Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.6. Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.7. Flow Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.8. Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.9. Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.9.1 Alarm Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.9.2 Relay 1 and 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.10. Signal Output 1 and 2 (current outputs) . . . . . . . . . . . . . . . . . . . . 20
3.11. Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.11.1 RS232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.11.2 Profibus (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.11.3 Modbus (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4. Instrument Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1. Establish Sample Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2. Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5. Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1. Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3. Software Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.4. Changing Parameters and values . . . . . . . . . . . . . . . . . . . . . . . . 27

2A-96.250.541 / 230320
AMU Oxytrace
6. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1. Maintenance Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.2. Stop of Operation for Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 28
6.3. Maintenance of the Oxygen Sensor . . . . . . . . . . . . . . . . . . . . . . . 29
6.3.1 Electrolyte exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.3.2 Clean Swansensor Oxytrace G and Flow Cell . . . . . . . . . . . . . . 31
6.4. Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.5. Zero-Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.6. Longer Stop of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7. Error List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8. Program Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.1. Messages (Main Menu 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.2. Diagnostics (Main Menu 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.3. Maintenance (Main Menu 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.4. Operation (Main Menu 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.5. Installation (Main Menu 5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9. Program List and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . 44
1 Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
2 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10. Material Safety Data sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
10.1. Reagents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11. Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
12. Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
13. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

AMU Oxytrace
Safety Instructions
A-96.250.541 / 230320 3
AMU Oxytrace–Operator’s Manual
This document describes the main steps for instrument setup, oper-
ation 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
respective locations where observation is most important.
Strictly follow 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 The Operator’s Manual shall be kept 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.

4A-96.250.541 / 230320
AMU Oxytrace
Safety Instructions
1.1. Warning Notices
The symbols used for safety-related notices have the following sig-
nificance:
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 incor-
rect process can be the consequence if such warnings are ig-
nored.
Follow the prevention instructions carefully.
Mandatory
Signs
The importance of the mandatory signs in this manual.
Safety goggles
Safety gloves

AMU Oxytrace
Safety Instructions
A-96.250.541 / 230320 5
Warning Signs The importance of the warning signs in this manual.
Electrical shock hazard
Corrosive
Harmful to health
Flammable
Warning general
Attention general

6A-96.250.541 / 230320
AMU Oxytrace
Safety Instructions
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 responsi-
bility for any claim resulting from unauthorized modification or alter-
ation.
WARNING
Risk of Electrical Shock
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.
To prevent from electrical shock, always make sure that the
ground wire is connected.
Service shall be performed by authorized personnel only.
Whenever electronic service is required, disconnect instru-
ment power and power of devices connected to.
– relay 1,
– relay 2,
– alarm relay
WARNING
For safe instrument installation and operation you must read
and understand the instructions in this manual.
WARNING
Only SWAN trained and authorized personnel shall perform the
tasks described in this document.

AMU Oxytrace
Product Description
A-96.250.541 / 230320 7
2. Product Description
2.1. Description of the System
Application The AMU 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 met-
al 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 cor-
relation between the oxygen concentration and the electrical cur-
rent.
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 oxy-
gen levels will be shorter.
Temperature
compensa-
tion
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.
Signal
Outputs
Two signal outputs programmable for measured values (freely
scaleable, linear or bilinear) or as continuous control output (control
parameters programmable).
Current loop: 0/4–20 mA
Maximal burden: 510 Ω

8A-96.250.541 / 230320
AMU Oxytrace
Product Description
Relay Two potential-free contacts programmable as limit switches for
measuring values, controllers or timer for system cleaning with au-
tomatic hold function.
Maximum load: 100 mA/ 50 V
Alarm Relay One potential free contact. Summary alarm indication for program-
mable alarm values and Instrument faults.
Available in two configurations:
Normally open*: Closed during normal operation, open in case of
error or power loss.
Normally closed: Open during normal operation, closed in case
of error or power loss
*Standard configuration. To order the version with normally closed
alarm relay, contact your dealer in advance.
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 re-
mote-off).
Safety
Features
No data loss after power failure. All data is saved in non-volatile
memory. Over voltage protection of in- and outputs. Galvanic sepa-
ration of measuring inputs and signal outputs.
Communica-
tion Interface
RS232 interface for downloading the logger via Hyperterminal
RS485 with Fieldbus protocol Modbus or Profibus DP (optional)

AMU Oxytrace
Product Description
A-96.250.541 / 230320 9
Fluidics Swansensor OXYTRACE G combined with QV-flow PMMA OTG
flow cell:
The sample flows via sample inlet [E] through the flow regulating
valve [D], where the flow rate can be adjusted. Then the sample
flows into the measuring cell [C] were the oxygen concentration
and temperature of the sample is measured.
The sample leaves the measuring cell via flow sensor [B] through
the sample outlet.
A
B
C
Oxygen sensor
Flow sensor
Flow cell
D
E
Flow regulating valve
Sample inlet
A
B
C
D
E

10 A-96.250.541 / 230320
AMU Oxytrace
Product Description
2.2. Single Components
2.2.1 AMU Oxytrace Transmitter
General Electronics housing:
Protection degree:
Ambient temperature:
Humidity:
Display:
Dimensions:
Weight:
Noryl® resin
IP54 (front)
-10 to +50 °C
10–90% rel., non condensing
backlit LCD, 75 x 45 mm
96 x 96 x 120 mm (DIN 43700)
0.45 kg
Power supply Voltage:
Power consumption:
100–240 VAC (±10%)
50/60 Hz (±5%)
or 24 VDC (±15%)
max. 8 VA
Measuring
range
Dissolved Oxygen: 0.01 ppb–20 ppm
Saturation: 0–200%
Automatic range switching
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
1.0 ppb
0.01 ppm
0.1%

AMU Oxytrace
Product Description
A-96.250.541 / 230320 11
2.2.2 Sensor OXYTRACE G
Sensor for the measurement of dissolved oxygen in ultra pure wa-
ter. 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 resis-
tance
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

12 A-96.250.541 / 230320
AMU Oxytrace
Product Description
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

AMU Oxytrace
Product Description
A-96.250.541 / 230320 13
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

14 A-96.250.541 / 230320
AMU Oxytrace
Installation
3. Installation
3.1. Installation Check List
Check Instrument’s specification must conform to your power ratings. Do
not switch on power until all external devices are connected.
Installation The transmitter is intended for panel mounting. The dimensions
are shown under Dimensions of the AMU Transmitter, p. 15.
Electrical Con-
nections
Connect all external devices, see Electrical Connection, p. 17.
Connect the power cord, but do not switch on power until all exter-
nal devices are connected.
Swansensor
Oxytrace G
The Swansensor Oxytrace G is delivered with prefilled electrolyte
chamber. A transport protection cap filled with water keeps the
sensor wet during transport and storage. Before installation,
remove the transport protection cap and clean the sensor sur-
faces with water. Afterwards install the oxygen sensor and con-
nect the cable.
See Install the Swansensor Oxytrace G, p. 16.
Power-up Switch on power.
First, the analyzer performs a self test, displays the firmware ver-
sion and then starts normal operation
Run-in Period
Calibration
Leave the sensor at the air. The sensor has to run in for at least
30 min, better 1 h. During this time it has to be at air with a dry and
clean membrane and has to be connected to the powered instru-
ment. Calibrate the sensor after this time, see Calibration, p. 32.
and mount it into the flow cell afterwards.
Start Sample
Flow
Open the flow regulating valve and wait until the flow cell is filled
and the sample flows into the drain.
Programming Program all parameters for external devices (interface, etc.). Set
all parameters for instrument operation (limits, alarms).

AMU Oxytrace
Installation
A-96.250.541 / 230320 15
3.2. Dimensions of the AMU Transmitter
96 mm
89.8 mm
89.8 mm
112 mm
7 mm
96 mm
92 mm
92 mm

16 A-96.250.541 / 230320
AMU Oxytrace
Installation
3.3 Install the Swansensor Oxytrace G
The Swansensor Oxytrace G is delivered with a prefilled electrolyte
chamber [E]. A transport protection cap [B] filled with water [D]
keeps the sensor wet during transport and storage. To install the
sensor proceed as follows:
1Unscrew the fixing sleeve [A].
2Remove the transport protection cap [B].
3Clean the Swansensor Oxytrace G [C] with water.
4Install the Swansensor Oxytrace G into the flow cell
5Connect the sensor cable to the transmitter, see Electrical Con-
nection, p. 17.
A
B
C
D
E
Fixing sleeve
Transport protection cap
Swansensor Oxytrace G
Water
Sensor cap filled with electrolyte
A
B
C
D
E

AMU Oxytrace
Installation
A-96.250.541 / 230320 17
3.4. Electrical Connection
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.

18 A-96.250.541 / 230320
AMU Oxytrace
Installation
Rear view
of AMU
Transmitter
1
L
RS232
(+) (-)
N
23456789
RON OFF A/PB B/PB
10 11 12 13 14
24
23
22
21
20
19