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: support@swan.ch
Document Status
Title:
ID:
Monitor AMI Oxytrace QED Operator’s Manual
A-96.250.531
RevisionIssue
00Jan. 2008First Edition
01Nov. 2008Including AMI Oxytrace QED
02July 2011Chapter Quality Assurance added
03Oct. 2013New mainboard V2.4, update to FW Release 5.4
04Sept. 2016New mainboard V2.5, update to FW Release 6.20
This document describes the main steps for instrument setup, operation and maintenance.
1.Safety Instructions
GeneralThe 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 environment.
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
OM LocationThe AMI Operator’s Manual shall be kept in proximity of the instru-
Qualification,
Training
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.
ment.
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-96.250.531 / 300617
AMI Oxytrace QED
Safety Instructions
1.1.Warning Notices
The symbols used for safety-related notices have the following significance:
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 can be the consequence if such warnings are ignored.
Follow the prevention instructions carefully.
Mandatory
Signs
A-96.250.531 / 3006175
The importance of the mandatory signs in this manual.
Safety goggles
Safety gloves
AMI Oxytrace QED
Safety Instructions
Warning SignsThe importance of the warning signs in this manual.
Electrical shock hazard
Corrosive
Harmful to health
Flammable
Warning general
Attention general
6A-96.250.531 / 300617
AMI Oxytrace QED
Safety Instructions
1.2.General Safety Regulations
Legal
Requirements
Spare Parts
and
Disposables
ModificationsModifications and instrument upgrades shall only be carried out by
The user is responsible for proper system operation.
All precautions must be followed to ensure safe operation
of the instrument.
Use only official SWAN spare parts and disposables. If other parts
are used during the normal warranty period, the manufacturer’s
warranty is voided.
an authorized Service Technician. SWAN will not accept responsibility for any claim resulting from unauthorized modification or alteration.
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.
A-96.250.531 / 3006177
AMI Oxytrace QED
Product Description
2.Product Description
This manual describes the functions of the following monitors
AMI Oxytrace
AMI Oxytrace QED
Both monitors are mainly identical except that AMI Oxytrace QED
includes a faraday verification.
2.1.Description of the System
ApplicationAMI Oxytrace is used to measure low levels of oxygen in high-puri-
ty water. Especially in power plant water cycles (e.g. feedwater), 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
O
+ 4e- + 2 H2O --> 4 OH
2
This reaction creates a measurable current. There is a linear correlation 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
compensa-
tion
The measuring signal depends on temperature, but is automatically
compensated to 25 °C. The sample temperature is determined continuously by a temperature sensor inside the oxygen electrode.
8A-96.250.531 / 300617
AMI Oxytrace QED
Product Description
Faraday
Verification
40
35
30
25
20
15
10
Dissolved Oxygen [ppm]
5
For AMI Oxytrace QED only.
When a direct current is passed through water by means of two
electrodes, electrolysis of the liquid takes place, according to the
laws of Michael Faraday. Water is converted to molecular oxygen
and hydrogen.
Thus, by controlling the current, a fixed, known amount of oxygen,
which is independent of temperature and pressure, may be generated. If the sample flow is known, an exact oxygen concentration
increment can be generated at low levels. This increment is used to
verify the flawless operation of the whole system. Thereby the response characteristics (incremental change and response time) of
the sensor are taken into account. Sensor failures (loss of electrolyte etc.) can be detected very easily as shown in the plot below.
operational sensor
defective sensor
0
30
6090120150180210240270300330
Time [Sec]
Unusual sensor performance is recognized immediately and gives
also a maintenance indication to the operator/user. The faraday
verification is therefore an excellent QA/QC tool.
A-96.250.531 / 3006179
AMI Oxytrace QED
Product Description
Signal
Outputs
RelayTwo potential-free contacts programmable as limit switches for
Alarm RelayOne potential free contact.
InputFor potential-free contact to freeze the measuring value or to inter-
Safety
Features
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
Third signal output available as an option.
measuring values, controllers or timer for system cleaning with automatic hold function. Both contacts can be used as normally open
or normally closed.
Maximum load: 1 A/250 VAC
Alternatively:
Open during normal operation, closed on error and loss of
power.
Closed during normal operation, open on error and loss of
power.
Summary alarm indication for programmable alarm values and instrument faults.
rupt control in automated installations (hold function or remote-off)
No data loss after power failure. All data is saved in non-volatile
memory. Over voltage protection of in- and outputs.Galvanic separation of measuring inputs and signal outputs.The analyzer is factory tested and ready for installation and operation.
Communica-
tion Interface
(optional)
USB Interface for logger download
RS485 with Fieldbus protocol Modbus or Profibus DP.
HART interface
10A-96.250.531 / 300617
AMI Oxytrace QED
A
B
C
D
E
F
G
Product Description
FluidicsAMI Oxytrace
Swansensor oxygen combined with QV-flow PMMA OTG flow cell.
The sample flows via sample inlet [G] 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 [E] and the drain funnel [F].
A
Oxygen sensor
B
Flow sensor
C
Flow cell
D
Flow regulating valve
A-96.250.531 / 30061711
E
Sample outlet
F
Drain funnel
G
Sample inlet
AMI Oxytrace QED
A
B
C
D
F
E
G
H
Product Description
FluidicsAMI Oxytrace QED
Swansensor oxygen combined with QV-flow PMMA OTG flow cell.
The sample flows via sample inlet [H] through the flow regulating
valve [E], where the flow rate can be adjusted. Then the sample
flows through the faraday electrode [D] into the measuring cell [C]
were the Oxygen concentration of the sample is measured.
The sample leaves the measuring cell via flow sensor [B] through
the sample outlet [F] and the drain funnel [G].
A
Oxygen sensor
B
Flow sensor
C
Flow cell
D
Faraday electrode
12A-96.250.531 / 300617
E
Flow regulating valve
F
Sample outlet
G
Drain funnel
H
Sample inlet
AMI Oxytrace QED
Product Description
2.2.Technical Data
Power SupplyVoltage:
Power consumption:
ElectronicsAluminium with a protection degree of IP 66 / NEMA 4X
IP 66 / NEMA 4X
backlit LCD, 75 x 45 mm
screw clamps
AMI Oxytrace QED
100
59
31.9
38.3
Product Description
2.4.2Sensor 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.
Technical data:Clark oxygen electrode
Cathode gold, anode silver, guard silver
Zero current-free electrode system
Robust 25 µm fluoropolymer diaphragm
Measuring
range
Temp. sensor:NT5K
Accuracy:0,3 % if calibration temperature = measuring temp.
1,5 % at ± 10 °C deviation to cal. temperature
± 1 % of reading or ±0.15 ppb
:
< 30 seconds (rising concentration)
t
:
90
50 cm/s Pressure resistance: 3 bar
:
max. 50 °C
:
shaft: polyacetal copolymer
:
cathode/anode/guard: gold/silver/silver
membrane: fluoropolymer
IP 68
:
150 g
:
(25 °C)
2
Resolution
0.01 ppb
0.1 ppb
1.0 ppb
0.01 ppm
18A-96.250.531 / 300617
AMI Oxytrace QED
217.7
178.5
164
138
80
21
38
8
62
5.3
Product Description
2.4.3QV-Flow PMMA OTG
Flow cellFlow cell made of acrylic glass with integrated flow sensor.
Sample temp.max. 45 °C
Inlet pressuremax. 1 bar
Outlet pressure
Sample flow6–25 l/h
Process con-
nection inlet
OutletSERTO angle for 6 mm flexible tube
Dimensionssee picture below
Pressure free
Swagelok connection for 1/4” tube
A-96.250.531 / 30061719
AMI Oxytrace QED
Product Description
2.4.4B-Flow SS316L OTG
Flow cellB-Flow SS316L OTG is made of stainless steel without flow sensor
and can be used for higher operating pressures and temperatures.
Operating temp.
Sensormax. 50 °C
Operating
pressure
Sensormax. 3 bar
Flow cell
connection
Dimensionssee picture below
-10 to + 130 °C
max. 5 bar at 130 °C
2x female thread 1/8" ISO
52
40
126.1
128.6
99.5
20A-96.250.531 / 300617
AMI Oxytrace QED
Installation
3.Installation
The first part of this chapter describes the preparing and placing of
the system in position for use. The second part describes the wiring
and the properties of the signal outputs and relay.
Restrictions
on use
3.1.Installation Check List
If exposed to weather, install a cover to protect the instrument from
insolation and precipitation. See Technical Data, p. 13 for temperature limitations.
CheckInstrument’s specification must conform to the National Electrical
On site
requirements
InstallationMount the instrument in vertical position. Display should be at eye
Electrical
Connections
Swansensor
Oxytrace G
Code, all state and local codes, and all plant codes and standards
for electrical equipment.
100–240 VAC ( 10%), 50/60 Hz ( 5%) or 24 VDC (±10%),
isolated power outlet with ground connection and 30 VA
Sample line with 8– 25 l/h and 0.2 – 3 bar.
Waste line with pressure free drain.
level.
Connect the sample and waste line, see Connecting Sample Inlet
and Outlet, p. 23.
Connect all external devices like limit switches, current loops and
pumps, see Electrical Connections, p. 25.
Connect the power cord, do not switch on power until all external
devices are connected.
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 surfaces with water. Afterwards install the oxygen sensor and connect the cable.
See Install the Swansensor Oxytrace G, p. 24.
A-96.250.531 / 30061721
AMI Oxytrace QED
Installation
Tur n-o n
power
Run-in Period
Calibration
Open
Sample Flow
ProgrammingProgram all parameters for external devices (interface, etc.). Set
Switch on power.
First, the analyzer performs a self test, displays the firmware version and then starts normal operation
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 instrumenty. Calibrate the sensor after this time, see Calibration, p. 47.
and mount it into the flow cell afterwards.
Open the flow regulating valve to allow sample flow into the flow
cell and into the waste. Sample must always overflow into waste
all parameters for instrument operation (limits, alarms).
3.2.Mounting of Instrument Panel
The first part of this chapter describes the preparing and placing of
the system for use.
The instrument must only be installed by trained personnel.
Mount the instrument in vertical position.
For ease of operation mount it so that the display is at eye
level.
For the installation a kit containing the following installation
material is available:
– 4 Screws 8x60 mm
– 4 Dowels
– 4 Washers 8.4/24 mm
Mounting re-
quirements
The instrument is only intended for indoor installation.
For dimensions see Dimensions (Oxytrace and Oxytrace QED), p.
14.
22A-96.250.531 / 300617
AMI Oxytrace QED
12
3
9
6
ABCDE
F
Installation
3.3.Connecting Sample Inlet and Outlet
3.3.1Swagelok Fitting Stainless Steel at Sample Inlet
PreparationCut the tube to length and deburr it. The tube must be straight and
free from blemishes for approximately 1,5 x tube diameter from the
end.
Lubrication with lubricating oil, MoS2, Teflon etc. is recommended
for the assembly and reassembly of bigger sized unions (thread,
compression cone).
Installation1 Insert the compression ferrule [C] and the compression
cone [D] into the union nut [B].
2 Screw on the union nut onto the body, do not tighten it.
3 Push the stainless steel pipe through the union nut as far as it
reaches the stop of the body.
4 Mark the union nut at 6 o’clock position.
5 While holding the fitting body steady, tighten the nut union 1¼
rotation using an open ended spanner.
A
Stainless steel tube
B
Union nut
C
Compression ferrule
D
Compression cone
E
Body
F
Tightened connection
A-96.250.531 / 30061723
AMI Oxytrace QED
A
B
C
A
B
C
D
E
Installation
3.3.2FEP Tube at Sample Outlet
1/2” Tube at waste funnel.
Connect the 1/2” tube [C] to the hose nozzle [B] and place it into a
drain with atmospheric pressure.
3.4Install the Swansensor Oxytrace G
The Swansensor Oxytrace G is delivered with 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:
A
Waste funnel
B
Hose nozzle
C
1/2” tube
A
Fixing sleeve
B
Transport protection cap
C
Swansensor Oxytrace G
D
Water
E
Sensor cap filled with electrolyte
24A-96.250.531 / 300617
1 Unscrew the fixing sleeve [A].
2 Remove the transport protection cap [B].
3 Clean the Swansensor Oxytrace G [C] with water.
4 Install the Swansensor Oxytrace G into the flow cell
5 Connect the sensor cable to the transmitter, see Electrical Con-
nection Diagram AMI Oxytrace, p. 27.
AMI Oxytrace QED
Installation
3.5.Electrical Connections
WARNING
Risk of electrical shock.
Do not perform any work on electrical components if the transmitter is switched on. Failure to follow safety instructions could
result in serious injury or death.
Always turn off AC power before manipulating electric parts.
Grounding requirements: Only operate the instrument from
an power outlet which has a ground connection.
Make sure the power specification of the instrument corre-
sponds to the power on site.
Cable
thicknesses
In order to comply with IP66, use the following cable thicknesses
ABC
PG 11 cable gland: cable Ø
A
B
PG 7 cable gland: cable Ø
C
PG 9 cable gland: cable Ø
outer
3–6.5 mm
outer
4–8 mm
outer
5–10 mm
NOTICE: Protect unused cable glands
Wire For Relays: Use max. 1.5 mm
end sleeves.
For Signal Outputs and Input: Use 0.25 mm
2
/ AWG 14 stranded wire with
2
/ AWG 23
stranded wire with end sleeves.
A-96.250.531 / 30061725
AMI Oxytrace QED
Installation
WARNING
External Voltage.
External supplied devices connected to relay 1 or 2 or to the
alarm relay can cause electrical shocks
Make sure that the devices connected to the following con-
tacts are disconnected from the power before resuming in-
stallation.
–relay 1
–relay 2
– alarm relay
WARNING
To prevent from electrical shock, do not connect the instrument
to the power unless the ground wire (PE) is connected.
Do not connect unless specifically instructed to do so.
WARNING
The mains of the AMI Transmitter must be secured by a main
switch and appropriate fuse or circuit breaker.
26A-96.250.531 / 300617
AMI Oxytrace QED
Installation
3.5.1Electrical Connection Diagram AMI Oxytrace
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.
A-96.250.531 / 30061727
AMI Oxytrace QED
Installation
3.5.2Electrical Connection Diagram AMI Oxytrace QED
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.
28A-96.250.531 / 300617
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