Endress+Hauser SpectraSensors OXY5500 User manual

Products Solutions Services
Operating Instructions
OXY5500 Gas Analyzer
ATEX/IECEx/UKEX: Zone 2
cCSAus: Class I, Division 2
BA02195C/66/EN/02.22
70197321

Operating Instructions OXY5500 Gas Analyzer
2 Endress+Hauser

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 3
Table of Contents
1About this document............................ 4
1.1 Warnings..................................................................4
1.2 Symbols on the device.............................................4
1.3 U.S. export compliance ...........................................4
2Introduction .......................................... 5
2.1 Associated documents ............................................5
2.2 Who should read this manual................................5
2.3 How to use this manual..........................................5
2.4 General warnings and cautions .............................6
2.5 Documents provided with the analyzer ................7
2.6 Manufacturer address ............................................7
2.7 About the OXY5500 analyzer ................................7
2.8 Getting familiar with the analyzer ........................7
2.9 Safety guidelines ...................................................10
3Safety...................................................11
3.1 Potential risks affecting personnel .....................11
4Installation..........................................12
4.1 Shipping box contents ..........................................12
4.2 Inspecting the analyzer ........................................12
4.3 Installing the analyzer..........................................12
4.4 Required basic equipment....................................12
4.5 Hardware and tools for installation ....................13
4.6 Analyzer mounting ...............................................13
4.7 Connecting electrical power to the analyzer......14
4.8 Analyzer connections ...........................................16
4.9 Analog outputs/analog input connections.........16
5Operation ............................................19
5.1 Starting up the analyzer .......................................19
5.2 Operation overview...............................................19
5.3 Measurement menu..............................................21
5.4 Measurement settings (Meas. settings) menu..22
5.5 Device settings menu............................................23
5.6 Sensor menu ..........................................................23
5.7 Digitals menu.........................................................24
5.8 Analog output settings (Analogues) menu........25
5.9 Measurement menu options................................26
5.10 Measurement settings (Meas. settings) menu
options ...................................................................30
5.11 Device settings menu options..............................34
5.12 Sensor menu options ............................................37
5.13 Purging the cylinder pressure regulators and
analyzer..................................................................42
5.14 Digitals menu options...........................................49
5.15 Analog output settings (Analogues) menu
options ...................................................................50
6Modbus communication .................... 55
6.1 Protocol definition ................................................55
6.2 Examples................................................................64
7Appendix A: Specifications................ 66
7.1 Technical notes .....................................................67
7.2 Spare parts.............................................................71
8Appendix B: Maintenance and
troubleshooting.................................. 73
8.1 Optical output........................................................73
8.2 Cleaning the instrument ......................................73
8.3 Temperature probe lifespan ................................73
8.4 Fuse replacement..................................................73
8.5 Replacing the electro-optical module .................75
8.6 Installing/replacing the pressure sensor ...........76
8.7 Removing and replacing the oxygen probe........78
8.8 Correcting error codes ..........................................82
8.9 Recommendations for correct measurement.....82
8.10 Performance improvement..................................83
8.11 Troubleshooting....................................................83
8.12 Service ....................................................................83
8.13 Packing and storage .............................................84
8.14 Storage ...................................................................85
8.15 Disclaimers ............................................................85
8.16 Warranty................................................................85

Operating Instructions OXY5500 Gas Analyzer
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1About this document
1.1 Warnings
Structure of Information Meaning
Causes (/consequences)
If necessary, consequences of non-compliance
(if applicable)
‣ Corrective action
This symbol alerts you to a dangerous situation. Failure to avoid the dangerous
situation can result in a fatal or serious injury.
Causes (/consequences)
If necessary, consequences of non-compliance
(if applicable)
‣ Corrective action
This symbol alerts you to a dangerous situation. Failure to avoid this situation
can result in minor or more serious injuries.
Cause/situation
If necessary, consequences of non-compliance
(if applicable)
‣ Action/note
This symbol alerts you to situations which may result in damage to property.
Table 1. Warnings
1.2 Symbols on the device
Symbol Description
The High Voltage symbol that alerts people to the presence of electric potential large enough to cause injury or
damage. In certain industries, high voltage refers to voltage above a certain threshold. Equipment and conductors that
carry high voltage warrant special safety requirements and procedures.
The WEEE symbol indicates that the product should not be discarded as unsorted waste but must be sent to separate
collection facilities for recovery and recycling.
The CE Marking indicates conformity with Essential Health, Safety & Environmental requirements of Directive
2014/34/EU for products sold within the European Economic Area (EEA).
The UKCA marking indicates conformity with Essential Health, Safety & Environmental requirements of Directive
UKSI 2016:1107 for products sold on the market in Great Britain (England, Wales and Scotland).
Table 2. Symbols
1.3 U.S. export compliance
The policy of Endress+Hauser is strict compliance with U.S. export control laws as detailed in the website of the
Bureau of Industry and Security at the U.S. Department of Commerce.

OXY5500 Gas Analyzer Operating Instructions
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2Introduction
Endress+Hauser’s OXY5500 Optical Oxygen Analyzer is a stand-alone device designed to detect oxygen in gases such
as natural gas and air. Its design is based on fluorescence quenching technology that creates very stable, internally
referenced measured values.
2.1 Associated documents
Enclosed in your analyzer system order is the product Safety Instruction for your reference. Please review all
necessary safety instructions before installing or operating your analyzer. This document is an integral part of the
complete document package, which is listed in the following table.
Part Number Document Type Description
BA02195C Operating Instruction Provides a comprehensive overview of the analyzer and step-by-step
installation instructions
BA02196C Sample Conditioning System (SCS)
Operating Instruction
Commission, operation, and maintenance details for the Sample
Conditioning System
SD02868C Service Software Instruction Instructions for operating the OXY5500 Service software to diagnose
and maintain OXY5500 Optical Oxygen Analyzer systems
TI01656C Technical Information Provides technical data on the device with an overview of associated
models available
XA02754C Safety Instruction Safety Instructions for the OXY5500 Optical Oxygen Analyzer
Table 3. Associated documents
For additional instruction manuals, please refer to the following:
•For custom orders: Refer to the Endress+Hauser website (https://endress.com/contact) for the list of local sales
channels to request order-specific documentation. Order-specific documentation is located by analyzer serial
number (SN).
•For standard orders: Refer to the Endress+Hauser website product page to download the published manuals for
the analyzer: www.endress.com.
2.2 Who should read this manual
This manual should be read and referenced by anyone installing, operating, or having direct contact with the
analyzer.
2.3 How to use this manual
Take a moment to familiarize yourself with the content included in this Operating Instruction by reviewing the
"Table of Contents".
There are a number of options and accessories available for the OXY5500 analyzers. This manual has been written to
address the most common options and accessories. Images, tables, and charts have been included to provide a visual
understanding of the analyzer and its functions. Special symbols are also shown to provide the user with key
information regarding the system configuration and/or operation. Pay close attention to this information.
2.3.1 Conventions used in this manual
In addition to the symbols and instructional information, this manual is created with “hot links” to enable the user to
quickly navigate between different sections within the manual. These links include table, figure, and section
references and are identified by a pointing finger cursor when rolling over the text. Simply click on the link to
navigate to the associated reference.

Operating Instructions OXY5500 Gas Analyzer
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2.4 General warnings and cautions
Instructional icons are provided in this manual to alert the user of potential hazards, important information, and
valuable tips. Following are the symbols and associated warning and caution types to observe when servicing the
analyzer.
2.4.1 Equipment labels
Symbol Description
Follow instructions to avoid possible explosion.
Follow instructions to avoid electrostatic discharge.
Use appropriate tools to avoid electrostatic discharge.
Substitution of components may void certification.
Switch off power before replacing components to avoid explosion risk.
Switch off power before disconnecting system to avoid explosion risk.
Ensure grounding wire is connected at all times during operation.
Table 4. Equipment labels
2.4.2 Instructional symbols
Symbol Description
General notes and important information concerning the installation and operation of the analyzer.
Failure to follow all directions may result in fire.
Failure to follow all directions may result in damage or malfunction of the analyzer.
Maximum voltage and current specifications for fuses.
Table 5. Instructional symbols

OXY5500 Gas Analyzer Operating Instructions
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2.5 Documents provided with the OXY5500 analyzer
Each OXY5500 analyzer shipped from the factory is packaged with documents and software that are to be used for
system operation, as applicable to the system configuration. Typically, each shipment includes the following
documents:
•Operating Instruction (electronic copy)
•Sample Conditioning System (SCS) Operating Instruction (electronic copy)
•OXY5500 Service Software Operating Instruction (electronic copy) (and software)
•OXY5500 Safety Instruction (paper copy)
•Calibration Certificate (paper copy)
2.6 Manufacturer address
Endress+Hauser
11027 Arrow Route
Rancho Cucamonga, CA 91730
United States
www.endress.com
2.7 About the OXY5500 analyzer
The OXY5500 is a stand-alone precision oxygen analyzer enclosed in an ingress protected stainless steel case. The
rugged design and low power consumption makes the OXY5500 ready for an indoor or outdoor application in Class I,
Division 2, Groups A, B, C, and D, T3. In addition, the analyzer is also marked as II 3 G, Ex ec IIC T3 Gc IP66.
The OXY5500 is designed for three types of measurement ranges: 0 to 1000 ppmv, 0 to 5% O2, and 0 to 20% O2.
This analyzer was specifically designed for gas measurements using a flow through fiber-optic oxygen sensor
mounted in a 1/4 in. compression tee. The instrument LCD and data-logger are integrated into the system. The
analog outputs are programmable to provide data for oxygen and temperature. The digital interface and PC software
(included) are used for internal data storage and external data logging. Complete control, including all calibration
and adjustments, can be completed through the PC.
2.7.1 Temperature
Endress+Hauser’s optical oxygen sensors must be used with an RTD probe (Pt100 temperature sensor) in the
temperature ranges shown in Appendix A → . Each instrument is supplied with the RTD probe for compensation
and to record temperature variations.
2.7.2 Cross-sensitivity
The sensors can be used in methanol- and ethanol-water mixtures, as well as in pure methanol and ethanol.
Endress+Hauser recommends avoiding other organic solvents, such as acetone, chloroform, or methylene chloride,
which may swell the sensor matrix, rendering it unusable.
There are no cross-sensitivity issues with CO2, H2S, or SO2 (iconic species) pertaining to any of the three probe
types.
2.8 Getting familiar with the analyzer
Figure 1 shows a sample OXY5500 analyzer. Signal wiring and analyzer power are connected from the right side of
the analyzer (facing the unit). On the front panel of the analyzer, the LCD serves as the user interface to the analyzer.
The analyzer control electronics drive the sensor, collect the signal, and provide measurement output signals.

Operating Instructions OXY5500 Gas Analyzer
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Figure 1. OXY5500 analyzer
Inside the cabinet is the electro-optical module that provides power and other connections to the analyzer. Refer to
Figure 3 for an internal view of the analyzer.
The optional Sample Conditioning System (SCS) contains flow devices for the bypass loop and to control the flow to
the oxygen sensor. A pressure reducing device is also installed to reduce and control the pressure of the sample going
to the oxygen sensor. Depending on the application and/or ambient conditions, the SCS may also contain a heater
and thermostat to maintain the interior of an optional enclosure at a constant temperature. Refer to the Sample
Conditioning System (SCS) Operating Instructions for more information.
2.8.1 Oxygen probe
The oxygen sensor consists of a polymer optical fiber (POF) with a polished distal tip that is coated with a planar
oxygen-sensitive foil. The end of the polymer optical fiber is covered with a high-grade steel tube to protect both the
sensor material and the POF. Refer to Figure 3. Typically, the fiber is coated with an optical isolated sensor material
in order to exclude ambient light from the fiber sensor spot.
2.8.1.1 Schematic drawing for the oxygen probe
Refer to Figure 5 for a schematic of the trace oxygen probe.
Figure 2. Trace oxygen probe schematic
Sensor
Spot
SMA
Connector
Signalling Port
Analyzer Power Port
Oxygen Probe
RTD Probe
(pt100)
Keypad
Graphic Display
Chassis Ground Stud
Pressure Sensor
(Optional)

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 9
Figure 3. Inside cabinet view (AC version)
Figure 4. OXY5500 probe sensor spot
Endress+Hauser’s fiber-optic oxygen sensors are made with 2 mm polymer optical fibers. The sensing portion is a 4
mm stainless steel probe. As a standard, the probe is mounted in a 1/4 in. Swagelok Union Tee using a 1/4 in. x 4
mm adapter as shown in Figure 5. Please contact your sales representative for more information.
Figure 5. Standard fiber-optic oxygen sensors fittings
OP
-
6
OP
-
3
OP
-
9
Electro-Optical Module
Fuse Enclosure
Optical Module with
SMA Connector Fuse Enclosure
Relays
RJ-45 and USB Connectors
AC/DC Power Connection

Operating Instructions OXY5500 Gas Analyzer
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2.8.2 How an oxygen sensor works
The principle of measurement is based on the effect of fluorescence quenching by molecular oxygen.
Principle of fluorescence quenching by molecular oxygen (refer to Figure 6):
1. Fluorescence process in absence of oxygen:
oAbsorption of light: Excitation energy from the analyzer to the sensor spot.
oExcited state: Sensor spot becomes excited.
oEmission of light: In the absence of oxygen, the sensor spot decays to original energy state. The light
emitted during decay is quantified by the analyzer.
2. Fluorescence process in the presence of oxygen:
oAbsorption of light: The light from an LED is absorbed by the sensor spot.
oExcited state: Sensor spot becomes excited.
oEmission of light: If the sensor encounters oxygen molecules, the excess energy is transferred to the
molecule, decreasing, or “quenching” the fluorescence signal. The degree of quenching correlates to the
oxygen partial pressure.
Figure 6. Principle of dynamic quenching of luminescence by molecular oxygen
2.9 Safety guidelines
Please read these instructions and the OXY5500 Safety Manual (P/N XA02754C) carefully before working with
this instrument.
All functions of this device has been carefully tested and comply with safety requirements, prior to leaving the
factory. The correct functional and operational safety of this instrument can only be ensured if the user observes the
necessary safety precautions and specific guidelines presented in this manual. Refer to Appendix A →  and the list
outlined below.
•Before connecting the device to the electrical supply network, ensure that the operating voltage stated on the
power supply corresponds to the main voltage input as described in Appendix A.
•If the instrument is moved from cold to warm surroundings, condensation may form and interfere with the
functioning of the system. In this event, wait until the instrument temperature reaches room temperature before
putting the analyzer back into operation.
•Calibration, maintenance, and repair work must only be completed by qualified trained personnel.
•If there is any doubt as to the working condition of the analyzer, return the instrument for repair, and
maintenance. Consult with Service → .

OXY5500 Gas Analyzer Operating Instructions
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3Safety
3.1 Potential risks affecting personnel
This section addresses the appropriate actions to undertake when faced with hazardous situations before or during
service of the analyzer. It is not possible to list all potential hazards within this document. The user is responsible for
identifying and mitigating any potential hazards present when servicing the analyzer.
Technicians are expected to follow all safety protocols established by the customer that are necessary for
servicing the analyzer. These may include, but are not limited to, lockout/tag-out procedures, toxic gas
monitoring protocols, personal protective equipment (PPE) requirements, hot work permits, and other
precautions that address safety concerns related to performing service on process equipment located in
hazardous areas.
3.1.1 Mitigating risks
Refer to the instructions for each situation listed below to mitigate associated risks.
3.1.2 Electrocution hazard
1. Shut off power at the main disconnect external to the analyzer and open the enclosure.
Complete this action before performing any service that requires working near the main input power or
disconnecting any wiring or other electrical components.
2. Open enclosure door.
3.1.3 Explosion hazard
Any work in a hazardous area must be carefully controlled to avoid creating any possible ignition sources (e.g., heat,
arcing, sparking, etc.). All tools must be appropriate for the area and hazards present. Electrical connections must
not be made or broken with power on (to avoid arcing).
3.1.4 Electrostatic discharge
Use a damp cloth to clean the display and keypad to avoid static electricity discharge.
Adhere to all warning labels to prevent damage to the unit. Refer to General warnings and cautions → .

Operating Instructions OXY5500 Gas Analyzer
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4Installation
This section describes the processes used to install and setup your OXY5500 analyzer. Once the analyzer arrives, fully
examine the contents before installing the unit.
Endress+Hauser Class I Division 2 analyzers use a non-incendive protection method and Zone 2 uses an
increased safety ec protection method; as such, all portions of the local electrical installation codes apply. The
maximum allowed inductance to resistance ratio (L/R ratio) for the field wiring interface must be less than 25
μH/Ω.
The safety of the analyzer is the responsibility of the installer and the organization he/she represents.
4.1 Shipping box contents
The contents of the crates should include:
•The Endress+Hauser OXY5500 analyzer
•Optional Sample Conditioning System (SCS), if applicable
•A USB flash drive or CD, which includes this manual and other system manuals, calibration certificate, and
software. Refer to Documents Provided with the OXY5500 Analyzer → .
•One USB cable (for Service purposes)
If any of these contents are missing, refer to Service → .
4.2 Inspecting the analyzer
Unpack and place the unit on a flat surface. Carefully inspect all enclosures for dents, dings, or general damage.
Inspect the supply and return connections for damage, such as bent tubing. Report any damage to the carrier.
Avoid jolting the instrument by dropping it or banging it against a hard surface.
Each analyzer is custom configured with various accessories and options. If there is any discrepancy with your order,
please contact your local sales channel.
4.2.1 Lifting/carrying the analyzer
At approximately 5.44 Kg (12 lbs) without the sample conditioning system, the OXY5500 can easily be lifted from
the packaging and moved to the installation location. Take care to lift or carry the analyzer by the enclosure and not
by any ancillary probes or cables or damage may occur.
If the analyzer is configured with an optional integrated sample conditioning system (SCS), two individuals may be
required to lift and move the analyzer system. Refer to the OXY5500 SCS Operating Instructions (P/N BA02196C) for
more information.
4.3 Installing the analyzer
Installing the analyzer is relatively easy requiring only a few steps that, when carefully followed, will ensure proper
mounting and connection. This section includes information regarding:
•Hardware and Tools for Installation
•Analyzer Mounting
•Connecting Electrical Power to the Analyzer
•Analog Outputs/Analog Input Connections
4.4 Required basic equipment
The following components are shipped with the OXY5500 analyzer from the factory for installation and operation:
•Flow-through Tee fitting with probe
•Flow-through Tee fitting for temperature probe and pressure sensor (pressure sensor is optional)

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 13
4.5 Hardware and tools for installation
Depending on the particular configuration of accessories and options ordered, you may need the following hardware
and tools to complete the installation process.
4.5.1 Hardware
•1/4 in. (~6 mm) thickness Unistrut® (or equivalent) bolts and spring nuts
•Stainless steel tubing (using 1/4 in. [~6 mm] O.D. x 0.035 in. wall thickness, seamless stainless steel tubing is
recommended)
•3/4 in. conduit or appropriate Ex e M20 cable gland
•1/4 in. (M6) screws with an appropriate screw length for wall material, e.g., concrete, drywall, etc.
4.5.2 Tools
•Drill and bits
•Tape measure
•Level
•Pencil
•Screw driver (Philips)
•Screw driver, small (Flat-head)
•Needle-nose pliers
4.6 Analyzer mounting
The OXY5500 analyzer is manufactured for wall or Unistrut® (or equivalent) metal framing installations. Depending
on your application and configuration, the analyzer will come mounted on a plate or Unistrut frame. Refer to
Appendix A for drawings with detailed wall mounting dimensions.
When mounting the analyzer, be sure not to position the instrument so that it is difficult to operate adjacent
devices. Allow 1 m (3 feet) of room in front of the analyzer and any switches.
It is critical to mount the analyzer so that the supply and return lines reach the supply and return connections on
the chassis while still maintaining flexibility so that the sample lines are not under excessive stress.
Mounting brackets for equipment exceeding 18 kg intended for wall mounting and/or part(s) that support heavy
loads shall withstand four times the maximum static load.
Because the breaker in the power distribution panel or switch will be the primary means of disconnecting the
power from the analyzer, the power distribution panel should be located in close proximity to the equipment and
within easy reach of the operator, or within 3 meters (10 feet) of the analyzer.
4.6.1 Mounting the analyzer
1. Select a suitable location to mount the analyzer. Choose a shaded area or use an optional analyzer hood (or
equivalent) to minimize sun exposure.
Endress+Hauser analyzers are designed for operation within the specified ambient temperature range. Refer to
Appendix A. Direct sun exposure in some areas may cause the analyzer temperature to exceed the maximum
range.
2. Locate the mounting holes on your unit. Refer to Figure 7 and the system drawings in Appendix A→ .

Operating Instructions OXY5500 Gas Analyzer
14 Endress+Hauser
Figure 7. Analyzer mounting locations
3. For wall installations, mark the centers of the top mounting holes.
4. Drill the appropriate size holes for the screws you are using.
5. Hold the analyzer in place and fasten with the top screws.
6. Repeat for the bottom mounting holes.
Once all four screws are tightened, the analyzer should be very secure and ready for the electrical connections.
4.7 Connecting electrical power to the analyzer
The OXY5500 is able to interface with either AC or DC power connections.
The OXY5500 is available in power options of either 240 VAC or 9 to 30 VDC (CSA), or 18 to 30 VDC
(IEC/ATEX/UKEX). The OXY5500 can be powered by an DC source via connection directly to the terminal of the
DC/DC converter terminals. The AC powered is wired directly to the power supply mounted to the back plate.
Interconnection of the analyzer enclosure shall be accomplished using wiring methods approved for Class I,
Division 2 or Zone 2 hazardous locations as per the Canadian Electrical Code (CEC) Appendix B or J and the
National Electric Code (NEC) Article 501 or 505. The installer is responsible for complying with all local
installation codes.
4.7.1 AC connection
AC power is connected to the AC Power Supply at L1, N, and GND. Refer to Figure 1 for the Analyzer Power Port
location and Figure 73 →  for the wiring connection diagram.
4.7.2 DC connection
DC power is connected to the DC Power Supply at VI+ and –. Refer to Figure 1 for the Analyzer Power Port location
and Figure 73 for the wiring connection diagram.
Hazardous voltage and risk of electric shock. Before attaching the wiring to the analyzer, make sure the main
breaker/power switch is off.
Careful consideration should be taken when grounding. Properly ground the unit by connecting the main ground
lead to the protecting grounding stud labeled with the ground symbol. Connect the chassis ground stud to plant
grounding using 6mm2 or 10-gauge wire.
Do not exceed the 36 VDC power rating or electronics will be damaged.
Mounting Hole
Mounting Hole
Mounting Hole
Mounting Hole

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 15
4.7.3 Protective chassis and ground connections
Before connecting any electrical signal or power, the protective and chassis grounds must be connected.
Requirements for the protective and chassis grounds are as follows:
•The protective and chassis grounds must be of equal or greater size than any other current-carrying conductors,
including the heater located in the sample conditioning system.
•The protective and chassis grounds must remain connected until all other wiring is removed.
•If the protective and chassis ground is insulated, it must use the green/yellow color.
Refer to Figure 1 and Figure 2 for the protective and chassis ground locations.
4.7.4 Connecting electrical power to the analyzer
1. Open the OXY5500 analyzer electronics enclosure door. Take care not to disturb the electrical assembly inside.
Hazardous voltage and risk of electric shock. Failure to properly ground the analyzer may create a high-voltage
shock hazard.
2. Run conduit or armored braided cable from the power distribution panel to the conduit hub on the right side of
the analyzer enclosure labeled for power input.
Conduit seals or Ex e cable gland should be used where appropriate in compliance with local regulations.
Because the breaker in the power distribution panel or switch will be the primary means of disconnecting the
power from the analyzer, the power distribution panel should be located in close proximity to the equipment and
within easy reach of the operator, or within 3 meters (10 feet) of the analyzer.
The electrical installation to which the analyzer is connected must be protected against transients. The protective
device has to be set at a level not exceeding 140% of the peak rated voltage values at the power supply terminals.
An approved switch or circuit breaker rated for 15 amps should be used and clearly marked as the disconnecting
device for the analyzer.
3. For AC systems, pull ground, neutral (N), and L1 wires into the electronics enclosure. Refer to Figure 8.
For DC systems, pull VI +, – and ground wires into the electronics enclosure. Refer to Figure 8.
Figure 8. AC/DC power connections
4. Strip back the jacket and/or insulation of the wires just enough to connect to the power terminal block.
5. Connect the main ground wire to the protection ground terminal marked .
6. Close and tighten the analyzer enclosure door.
Apply 2.25 nm (20 in-lbs) of torque on each bolt to ensure the door is closed properly to maintain required
ingress protection.

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4.8 Analyzer connections
The fiber optic oxygen cable to the SMA connector, located at the bottom of the OXY5500, will be installed at the
factory. Additional connectors are available as shown in Figure 9.
RS-232/RS-485 Interface: The unit has standard RS-232 communication via Modbus protocol. Use care in
making connections as described in Modbus Communication →  to avoid communication problems and
potential damage to the unit.
Optical Module with SMA Connector: The optical module with SMA connector is used to connect to the oxygen
probe, which is installed at the factory.
USB Connection: The USB connection is for service and troubleshooting purposes only. Do not connect during
normal operation. To avoid damage to the port, use only the USB Mini B cable to connect to the unit. Refer to the
Service Software Operations Manual (P/N 4900002254) for system requirements.
Ethernet: The unit uses standard Modbus - TCP/IP communication. Use a CAT5 (or better) cable and make
connections per IEEE 802.3 standard.
Figure 9. Analyzer connections
4.9 Analog outputs/analog input connections
The OXY5500 is equipped with two independent analog outputs and one analog input. The 4-20 mA current loop and
serial output are connected terminal blocks located inside the analyzer electronics enclosure. By default, the 4-20mA
current loop analog outputs (IOUT1/IOUT2) are set to inactive.
The analog outputs are programmable to oxygen and temperature. To allow external data collection, one input port
is available (i.e., external pressure sensor).
Connections can be made with customer-supplied cables for the current loop and alarms. Refer to Figure 10.
Hazardous voltage and risk of electric shock. The analog outputs are not protected against any input voltage. Any
voltage applied to the analog outputs can cause irreversible damage to the circuit.
Hazardous voltage and risk of electric shock. Turn off and lock out system power before opening the electronics
enclosure and making any connections.
Endress+Hauser Class I Division 2 analyzers use a non-incendive protection method and Zone 2 uses an
increased safety ec non-arcing protection method; as such, all portions of the local electrical installation codes
apply. The maximum allowed inductance to resistance ratio (L/R ratio) for the field wiring interface must be less
than 25 µH/Ω.
The 4-20 mA outputs are configured as sourcing to provide power to the loop. If a PLC/HMI is used to provide
power to the loop, an isolator is necessary and must comply with the specifications provided in Table 8.
Installation of the isolator must comply with the non-incendive or non-arcing protection method detailed in the
note above.
Certified Ex e glands and cables, or conduit seal and conduit, should be used where appropriate in compliance
with local regulations.
RJ
-
45
USB
TB2
Fuse Box
TB
1
Optical
Module
wi
th
SMA

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 17
4.9.1 Connecting the analog outputs/analog inputs
1. Disconnect power from the analyzer and open the electronics enclosure cover. Take care not to disturb the
electrical assembly inside.
2. Run conduit or rated armor cable with the appropriate cable glands (minimum Exe rated) from the analog
outputs/inputs receiving station to the conduit hub in the right outside corner of the electronics enclosure.
3. If using conduit, pull the customer-supplied cables for the source outputs through the conduit into the electronics
enclosure.
Figure 10. TB1/TB2 connections
If using rated armor cable, wires are already provided. Skip to step 4.
4. Strip back the jacket and insulation of the current loop output and serial cables just enough to connect to the
mating terminal block.
5. Connect the 4-20 mA current loop IOUT1/IOUT2 output wires to terminals 6 and 8, as shown in Figure 9 and
Table 7.
6. Connect the serial cable wires to the appropriate terminals according to Table 7 (TB1).
7. To complete the connection, connect the other end of the current loop wires to a current loop receiver and the
external serial cable to a serial port on your computer.

Operating Instructions OXY5500 Gas Analyzer
18 Endress+Hauser
Pin Label Description Function
1 L-S1 Relay output, switch #1 (400V/250mA; R = max 8 Ohm) General Fault Alarm; normally closed
2 L-S1 Relay output, switch #1 (400V/250mA; R = max 8 Ohm)
3 L-S2 Relay output, switch #2 (400V/250mA; R = max 8 Ohm) Concentration Alarm; normally closed
4 L-S2 Relay output, switch #2 (400V/250mA; R = max 8 Ohm)
5 GNDA Analog output #1 ground Configurable analog output #1
6 IOUT1 Analog output #1 (4 – 20 mA); max load = 800 Ohm
7 GNDA Analog output #2 ground Configurable analog output #2
8 IOUT2 Analog output #2 (4 – 20 mA); max load = 800 Ohm
9 NC Not connected —
10 Psense- Analog input (4 – 20 mA); Sense (-) Pressure sensor input
11 Psense+ Analog Input (4 – 20 mA); Sense (+) loop-power 16 to 24 VDC;
max current = 32 mA
12 RTD + 4-wire RTD Pt100; Sense (+) Temperature probe
13 RTD - 4-wire RTD Pt100; Sense (-) Temperature probe
14 FRC+ 4-wire RTD Pt100; Force (+)
15 FRC- 4-wire RTD Pt100; Force (-)
16 GNDT RTD ground (Shield)
Table 6. Terminal block TB2
1The 4-20 mA outputs are configured as sourcing to provide power to the loop. If a PLC/HMI is used to provide power to the loop, an isolator will be
required.
Pin Label Description Function
1 V1+ Power supply 24 VDC - Factory connection DC power input
2 V2+ Power supply 24 VDC - Factory connection DC power input
3 GND Power supply GND - Factory connection Power ground
4 GND Power supply GND - Factory connection Power ground
5 232TX RS-232 transmitter output (typical signal level ± 6 V) RS-232 signal transmit
6 232Rx RS-232 receiver input (typical signal level ± 6 V) RS-232 signal receive
7 GND RS-232/RS-485 ground RS-232/RS-485 signal ground
8 GND RS-232/RS-485 ground RS-232/RS-485 signal ground
9 485(A)+ RS-485 non-inverting receiver input and non-inverting driver
output
RS-485 signal
10 485(B)- RS-485 inverting receiver input and inverting driver output RS-485 signal
Table 7. Terminal block TB1

OXY5500 Gas Analyzer Operating Instructions
Endress+Hauser 19
5Operation
The instructions provided in this chapter should be used to start up, configure, and operate the OXY5500. On the face
of the analyzer is an LCD with programming and data readouts. Refer to Figure 1 for an external view of the analyzer
with descriptions.
5.1 Starting up the analyzer
Before powering up the OXY5500, refer to the system drawings in Appendix A →  to confirm the proper power
connections to the power supply, temperature sensor, and oxygen sensor.
As soon as the OXY5500 is connected to the power supply, the analyzer begins running a short self-test sequence.
Refer to Figure 11.
Figure 11. Initial screen - Self-check
The display switches to the main measurement screen automatically. Refer to Figure 12.
To achieve a highest accuracy, the OXY5500 should be warmed up for approximately five minutes before taking a
measurement.
Warm-up time may be extended up to 15 minutes if the optode has been exposed to high concentrations of
oxygen.
After the warm-up, complete a field calibration to achieve accurate measurements. Refer to Performing a manual
calibration (calibration using sensor values) → .
5.2 Operation overview
The screens and menus described in this chapter are used to program and operate the OXY5500. Links have been
included to assist in navigating through the instructions. Refer to Conventions used in this manual → , which
explains hot links and how to use them. Other conventions used in this chapter to describe user actions and to assist
in software or manual navigation include:
•Underlined text: Used to show clickable program buttons in the software.
•ALL CAPITAL LETTERS: Used to indicate screens or windows viewed throughout the software program.
•Italic text: Used to indicate software fields that can be edited.
•Bold text: Used to indicate links to other sections or chapters in the manual.
After the analyzer has been initialized, the MAIN MENU screen displays. Refer to Figure 12.

Operating Instructions OXY5500 Gas Analyzer
20 Endress+Hauser
Figure 12. Main menu screen
The OXY5500 display is divided into three sections: status bar, main screen, and navigation bar.
The status bar shows:
•Time: The OXY5500 has a 24-hour clock setting.
The OXY5500 must be calibrated before use. Refer to Performing a two-point calibration → .
If the power to the analyzer is disabled, the Time and Date will be set to 0 on start-up. A warning message will
display in the Status bar as shown in Figure 13.
Figure 13. Warning: Timestamp reset
Reset the Time and Date settings as shown in the Device Settings Menu →  before starting a new measurement so
that the correct time is stored in the data.
•The Monitor symbol in the Status bar indicates that logging is activated.
•The Monitor (X) symbol in the Status bar indicates that logging is not activated.
The Main screen consists of the central area of the display above the Navigation Bar and provides information about
the analyzer.
The Navigation Bar is across the lower section of the display and shows the Control buttons used to perform actions
in the analyzer.
•Click Menu to access the MAIN MENU screen.
Refer to Figure 14 for a view of the MENU MAP that outlines the OXY5500 software structure. This section gin with
a review of the top level menu screens (shown in grey boxes in the Menu Map) and then continue with an overview
of the accessible screens available from each menu screen.
Status Bar
Main Screen
Navigation Bar