Endress+Hauser OXY5500 QF Firmware update

Products Solutions Services
XA02754C/66/EN/01.21
Safety Instruction
OXY5500 QF Gas Analyzer
CSA, ATEX Zone 1

Revision History
Copyright © 2021 Endress+Hauser. No part of this manual may be reproduced in whole or in part without
the express written permission of Endress+Hauser. Endress+Hauser reserves the right to change product
design and specifications at any time without prior notice.
Revision Engineering Order Date
A EO16609 Dec. 21, 2016
B ECR17051 April 7, 2017
01.21 EO18935 November 18, 2021

Endress+Hauser i
OXY5500 QF Gas Analyzer XA02754C
Table of Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
How to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . .1
Conventions used in this manual . . . . . . . . . . . . . . . 1
Associated Documents . . . . . . . . . . . . . . . . . . . . . . . . . .1
Manufacturer Address . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 General Safety Information . . . . . . . . . . . . . . . . . . . . 3
Intended Equipment Use. . . . . . . . . . . . . . . . . . . . . . . . .3
Warning Labels and Cautions . . . . . . . . . . . . . . . . . . . .3
Safety warning label. . . . . . . . . . . . . . . . . . . . . . . . . .3
Equipment labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Instructional symbols . . . . . . . . . . . . . . . . . . . . . . . . .5
Analyzer Technical Specifications . . . . . . . . . . . . . . . . .5
Peripheral devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Equipment rating . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Technical notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Potential Risks Affecting Personnel . . . . . . . . . . . . . . .7
Personnel responsibility . . . . . . . . . . . . . . . . . . . . . . 7
Mitigating Risks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrocution hazard . . . . . . . . . . . . . . . . . . . . . . . . .8
Explosion hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Electrostatic discharge . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Equipment Installation. . . . . . . . . . . . . . . . . . . . . . . . 9
Mounting the Analyzer. . . . . . . . . . . . . . . . . . . . . . . . . .9
Lifting/carrying the analyzer . . . . . . . . . . . . . . . . . .9
Environmental Considerations . . . . . . . . . . . . . . . . .9
Opening/Closing the Analyzer Enclosure. . . . . . . . . .10
Protective Chassis and Ground Connections . . . . . . .10
Protective ground . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Chassis ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Electrical Wiring Requirements . . . . . . . . . . . . . . . . . .10
External Circuit Breaker Requirements. . . . . . . . . . . .10
4 Equipment Operation . . . . . . . . . . . . . . . . . . . . . . . . 12
Operating Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Intermittent Operation . . . . . . . . . . . . . . . . . . . . . . . . .12

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Prepare, clean, decontaminate the analyzer for
shipment/storage . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cleaning the Instrument . . . . . . . . . . . . . . . . . . . . . . . 13
5 Maintenance and Service . . . . . . . . . . . . . . . . . . . . . 14
Fuse Ratings and Characteristics . . . . . . . . . . . . . . . . 14
Checking Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Before contacting Service. . . . . . . . . . . . . . . . . . . . 14
Appendix A: Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

OXY5500 QF Gas Analyzer XA02754C
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1 Introduction
Endress+Hauser’s OXY5500 QF gas analyzer is a stand-alone oxygen meter
designed to detect oxygen in gases such as Natural Gas and air. Its design is
based on fluorescence quenching technology that creates very stable, inter-
nally referenced measured values.
In order to operate the analyzer safely, it is important to closely review all
information contained in the manuals provided with the analyzer. Refer to
Associated Documents below. This manual is divided into the following sec-
tions:
• General Safety Instructions (Chapter 2)
• Equipment Installation (Chapter 3)
• Equipment Operation (Chapter 4)
• Equipment Maintenance and Service (Chapter 5)
How to Use This
Manual
Take a moment to familiarize yourself with this manual by reading the Table
of Contents →  i. This manual has been written to address the most com-
mon safety issues related to the installation and operation of the OXY5500
analyzer. Additional information has been provided with the purchased ana-
lyzer to instruct qualified users in the general installation, operation and
maintenance of the equipment.
Images, tables and charts have been included with instruction to provide a
visual understanding of the analyzers and its functions. Special symbols are
also used to provide the user with key information regarding the system con-
figuration and/or operation. Users should pay close attention to this infor-
mation.
Conventions used in this manual
In addition to the symbols and instructional information, this manual is cre-
ated with “hot links” to enable the user to quickly navigate between different
sections within the manual. These links include table, figure and section ref-
erences and are identified by a pointing finger cursor when rolling over
the text. Simply click on the link to navigate to the associated reference.
Associated
Documents
Enclosed in your analyzer system order is the product Safety Instruction for
your reference. Please review all necessary safety instructions before install-
ing or operating your analyzer.
Each analyzer shipped from the factory is packaged with documents specific
to the model that was purchased. They can be found on the USB flash drive
provided. This document is an integral part of the complete document pack-
age listed in the following table.

XA02754C OXY5500 QF Gas Analyzer
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Table 1–1 OXY5500 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 documen-
tation. 1
• For standard orders:
• Refer to the Endress+Hauser website product page to download the
published manuals for the analyzer: www.endress.com
Manufacturer
Address
Endress+Hauser
11027 Arrow Route
Rancho Cucamonga, CA 91730
United States
www.endress.com
Part Number Document Type Description
BA02195C Operating
Instruction
A complete overview of the
operations required to
install, commission and
maintain the device.
TI01656C Technical
Information
Provides technical data on
the device with an over-
view of associated models
available.
BA02196C SCS Operating
Instruction
Gives details for the com-
mission, operation and
maintenance for the
OXY550 QF Gas Analyzer
Sample Conditioning Sys-
tem (SCS).
SD02868C Service Software
Operating
Instruction
Instructions for operating
the OXY5500 Service soft-
ware to diagnose and
maintain OXY5500 QF gas
analyzer systems.
1. Order-specific documentation is located by analyzer serial number (SN).

OXY5500 QF Gas Analyzer XA02754C
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2 General Safety Information
Each analyzer shipped from the factory includes documentation for the pur-
pose of relaying installing, operating and safety instructions to the responsi-
ble party and/or operator of the equipment. This chapter reviews the general
safety instruction for every OXY5500 analyzer.
Intended Equipment
Use
The OXY5500 analyzer is intended for use as instructed in the documenta-
tion package provided with the equipment. This information provided should
be read and referenced by anyone installing, operating or having direct con-
tact with the OXY5500 analyzer. Any use of the equipment in a manner not
specified by Endress+Hauser could impair the protection provided by the
equipment.
Warning Labels and
Cautions
Instructional icons are provided in all equipment manuals and on the
OXY5500 analyzer to alert the user of potential hazards, important informa-
tion and valuable tips. Following are the symbols and associated warning and
caution types to observe when servicing the analyzer. Some of these symbols
are provided for instructional purposes only and are not labeled on the sys-
tem.
Safety warning label
The warning label shown below will be affixed to the front side of all analyzer
enclosures that contain sample gas.
Hazards may vary by stream composition. One or more of the following con-
ditions may apply.
Flammable. Gases used in the processing of this analyzer
may be extremely flammable. Any work in a hazardous
area must be carefully controlled to avoid creating any
possible ignition sources (e.g., heat, arching, sparking,
etc.).

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4 Endress+Hauser
Equipment labels
Toxins. Endress+Hauser analyzers measure a variety of
gases, including high-level H2S. Follow all safety protocols
governing toxic gases and potential leaks.
Inhalation. Inhaling toxic gases or fumes may cause
physical damage or death.
Technicians are expected to follow all safety protocols
established by the customer that are necessary for servicing
or operating the analyzer. This may include, but is not
limited to, lockout/tag-out procedures, toxic gas
monitoring protocols, PPE requirements, hot work permits
and other precautions that address safety concerns related
to performing service or operation on process equipment
located in hazardous areas.
Warning statement for hazardous voltage. Contact may
cause electric shock or burn. Turn off and lock out system
before servicing.
Failure to follow all directions may result in damage or
malfunction of the analyzer.
PROTECTIVE EARTH GROUND — Symbol indicates the
connection point of the ground wire from the main power
source.
WARNING - POTENTIAL ELECTROSTATIC CHARGING HAZARD –
SEE INSTRUCTIONS
_______________________________________________
AVERTISSEMENT - DANGER DE CHARGE ELECTROSTATIQUE
POTENTIELS - VOIR LES INSTRUCTIONS
CAUTION: DO NOT OPERATE MACHINE WITH GROUNDING
WIRE DISCONNECTED
______________________________________________
ATTENTION: NE PAS METTRE L'APPAREIL EN MARCHE
QUAND LE CONDUCTEUR DE MISE A LA TERRE EST DEB-
RANCHE.
WARNING - EXPLOSION HAZARD – SUBSTITUTION OF
COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I,
DIVISION 2 OR ZONE 2 (II 3G)
______________________________________________
AVERTISSEMENT - RISQUE D'EXPLOSION – LA
SUBSTITUTIOND E COMPOSANTSP EUTR ENDRE CE
MATERIEL INACCEPTABLE POUR LES EMPLACEMENTS DE
CLASSE I, DIVISION 2 OU ZONE 2 (II 3G)
WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT
EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR
THE AREA IS KNOWN TO BE NON-HAZARDOUS
_______________________________________________
AVERTISSEMENT - RISQUE D'EXPLOSION - AVANT DE
DECONNECTER L'EQUIPEMENT, COUPER LE COURANT OU
S'ASSURER QUE L'EMPLACEMENT EST DESIGNE NON
DANGEREUX

OXY5500 QF Gas Analyzer XA02754C
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Instructional symbols
Analyzer Technical
Specifications
For the OXY5500 QF Gas Analyzer, a set of technical specifications are pro-
vided that outline recommended equipment settings and ratings. Standard
system drawings are included on →  16 that illustrate the OXY5500 ana-
lyzer outline and dimensions.
Peripheral devices
For systems equipped with peripheral devices, e.g., probe assemblies, only
devices that meet with Endress+Hauser’s specifications may be used. Refer
to documentation provided by the manufacturer for instruction on installa-
tion, operation, etc.
Equipment rating
Equipment rating information for the OXY5500 QF Gas Analyzer is included
in OXY5500 analyzer specifications →  6. This information includes, but is
not limited to, the following:
• Supply voltage, power and current rating
• Description of all input connections
• Environmental conditions for which the equipment is designed (i.e.,
environmental temperature range, environmental relative humidity)
• Degree of ingress protection (IP)
WARNING - USE DAMP CLOTH TO CLEAN DISPLAY AND KEY-
PAD TO AVOID STATIC ELECTRICITY DISCHARGE.
_____________________________________________
AVERTISSEMENT - AUX CHARGES ELECTROSTATIQUES.
UTILISER UN CHIFFON HUMIDE POUR NETTOYER
L’AFFICHEUR ET LE CLAVIER.
WARNING - EXPLOSION HAZARD - DO NOT REPLACE ______
UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS
KNOWN TO BE NON-HAZARDOUS
______________________________________________
AVERTISSEMENT - RISQUE D'EXPLOSION - COUPER LE COU-
RANT OU S'ASSURER QUE L'EMPLACEMENT EST DESIGNE
NON DANGEREUX AVANT DE REMPLACER LE ______
General notes and important information concerning the
installation and operation of the analyzer.
Failure to follow all directions may result in damage or
malfunction of the analyzer.
Warning statement for hazardous voltage. Contact may
cause electric shock or burn. Turn off and lock out system
before servicing.
Maximum voltage and current specifications for fuses.

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Table 2–1 OXY5500 analyzer specifications
Application Data
Target
Components
O
Typical
Measurement
Ranges
OP-91
1. Analyzer ships with one sensor. Additional sensors are optional.
OP-6OP-3
0 to 200 ppmv
(default)
0-10 to 10-1,000
ppmv2
User setting
2. Accuracy specification applies to concentrations up to 300 ppmv.
0 to 5%
0-1 to 0-
5%
User set-
ting
0 to 20%
0-10 to 0-20%
User setting
Lower Limit of
Detection
0.5 ppmv 20 ppmv 300 ppmv
Temperature
Range3
(Configurable)
3. Configurable based on OP-9, OP-6, OP-3 probe constants. Refer to the Cali-
bration Certificate.
1) 0 °C to 60 °C (32 °F to 140 °F)
2) -20 °C to 50 °C (-4 °F to 122 °F)
Sample Inlet
Pressure
140 to 275 KPaG (20 to 40 PSIG) to sample panel reg-
ulator
Sample
Pressure Range
800 to 1400 mbara
Maximum
Probe Pressure
275 KPaG (40 PSIG)
Sample Flow
Rate
Typical 1.0 SLPM (2.1 SCFH)
Electrical & Communications
Input Power
(Voltage and
Max. Power)
108 to 253 VAC, 50/60 Hz; 5.3W at 120 VAC; 6.6W
at 240 VAC or 9 to 30 VDC (CSA), 18 to 30 VDC (IEC/
ATEX); 4.7 W at 24 VDC
Physical
Enclosure Type NEMA Type 4X and IP64 rated, 304 and 316
(optional) Stainless Steel
Analyzer
Dimensions
280 x 230 x 114 mm (11 x 9 x 4.5 inches) H X W x D
(not including Sample Conditioning System)
Controller to
Probe Cable
Length
0.7 m — Standard
2.5 m and 5.0 m — Optional
Weight 2.2 Kg (4.9 lbs) — OXY5500 analyzer without Sample
Conditioning System
14 Kg (31 lbs) — OXY5500 analyzer on a panel
35.4 Kg (78 lbs) — OXY5500 analyzer in enclosure

OXY5500 QF Gas Analyzer XA02754C
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Technical notes
•Waterproof Enclosure: The enclosure and fittings are designed for
IP64/NEMA 4X ratings. In order to maintain this rating, all connec-
tions must be made with proper hardware and adhering to suggested
procedures. Use of incorrect materials can compromise the integrity of
the environmental seals.
Potential Risks
Affecting Personnel
This section addresses the appropriate actions to undertake when faced with
hazardous situations during or before service of the analyzer. It is not possi-
ble to list all potential hazards within this document. The user is responsible
for identifying and mitigating any potential hazards present when servicing
the analyzer.
Personnel responsibility
Mitigating Risks Refer to the instructions for each situation listed below to mitigate associated
risks.
Sample Probe
Construction
316 Stainless Steel
Area
Classification —
Certification
CSA: Class I, Div. 2, Groups A, B, C and D T4, NEMA 4X
ATEX/IECEx: II 3 G, Ex nA IIC T3 Gc IP64,
LCIE 16 ATEX 1012 X, IECEx LCIE 16.0009 X
For a complete listing of new or updated certificates, please
visit the product page at www.endress.com.
Technicians are expected to follow all safety protocols
established by the customer that are necessary for servicing
the analyzer. This may include, but is not limited to, lockout/
tagout 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.
The safety of the analyzer is the responsibility of the installer
and the organization he/she represents.

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Electrocution hazard
1. Shut off power at the main disconnect external to the analyzer.
2. Open enclosure door.
If service must be performed with power engaged:
1. Note any live electrical components and avoid any contact with them.
2. Only use tools with a safety rating for protection against accidental
contact with voltage up to 1000V (IEC 900, ASTF-F1505-04, VDE
0682/201).
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).
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 →  3.
Complete this action before performing any service that
requires working near the main input power or
disconnecting any wiring or other electrical components.

OXY5500 QF Gas Analyzer XA02754C
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3 Equipment Installation
The information in this chapter is related to safety during the equipment
installation.
Mounting the
Analyzer
The OXY5500 QF Gas Analyzer is manufactured for wall installations.
Depending on your application and configuration, the analyzer will come
mounted on a plate. For detailed mounting dimensions, refer to the layout
diagrams provided with the OXY5500 analyzer or in the OXY5500 Operating
Instruction →  1.
Lifting/carrying the analyzer
The OXY5500 can easily be lifted from the packaging and moved to the
installation location. Refer to the Technical Specifications →  6 for weights
by configuration. 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. For more information, refer to the OXY5500 SCS Operating Instruc-
tion →  1.
Environmental Considerations
The analyzer should be mounted in an enclosure or, if outside, under a sun
shade to prevent direct sunlight exposure.
The analyzer shall not be mounted more than 2,000 meters above sea level.
Endress+Hauser Class I Division 2 analyzers use a non-
incendive protection method and Zone 2 uses a 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.
Mounting brackets for equipment intended to be mounted on
a wall and/or part/s that support heavy loads shall withstand
four times the maximum static load.
When mounting the analyzer, be sure to position the
instrument so that it is not difficult to operate adjacent
devices. Allow 1 meter (three 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.

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Opening/Closing the
Analyzer Enclosure
Protective Chassis and
Ground Connections
Before applying any electrical signal or power, the protective and chassis
grounds must be connected.
Protective ground
• The protective ground (AWG and mm2), routed with the phase and
neutral wire, shall be equal or greater than the phase or neutral wires.
• The protective ground shall be connected in such a way that it is
unlikely to be removed during servicing that does not require discon-
nection of the protective conductor.
• The protective ground is the first wire to be connected to the analyzer
and the last one to be removed; its color can be either solid green or
green/yellow.
Chassis ground
• The chassis wire must be at least 6 mm.
• The chassis ground wire shall be connected to the rod or frame of the
shelter as soon as the protective ground wire is connected to the
instrument.
Electrical Wiring
Requirements
External Circuit
Breaker Requirements
Hazardous voltage and risk of electric shock. Failure to
properly ground the analyzer may create a high-voltage
shock hazard.
Conduit seals or Ex e cable gland should be used where
appropriate in compliance with local regulations.
Apply 20 in-lbs of torque on each bolt to ensure the door is
closed properly to maintain required ingress protection.
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.
Because the breaker in the customer-provided 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.

OXY5500 QF Gas Analyzer XA02754C
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After installing all necessary conduit runs, make sure any remaining conduit
hubs, if installed with the Analyzer (Module 1) enclosure, are CSA and/or UL
Certified and rated Type 4X and/or IP64.
The customer-provided circuit breaker shall meet the relevant
requirements of IEC 60947-1 and IEC 60947-3 and must be
marked as the disconnecting device for the analyzer. This
switch or breaker shall not interrupt the protective earth
conductor.
The electrical installation to which the analyzer is connected
must be protected against transients. The protective device
must be set at a level not exceeding 140% of the peak rated
voltage values at the power supply terminals.
Thread lubricant must be applied on all conduit hub threaded
connections. Using STL8 lubricant on all conduit screw thread
and it’s taped openings is recommended.

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4 Equipment Operation
This chapter provides an overview of safety operational instructions for the
OXY5500 QF Gas Analyzer.
Operating Controls The OXY5500 QF Gas Analyzer is shipped with complete operational instruc-
tions and drawings. For operational control instructions →  1.
Intermittent
Operation
If the analyzer is to be stored or shut down for a short time period, follow the
instructions for shutting down the sample conditioning system (SCS).
Prepare, clean, decontaminate the analyzer for shipment/stor-
age
1. Shut off the process gas flow.
2. Allow all residual gas to dissipate from the lines.
3. Connect a clean, dry nitrogen purge supply to the sample inlet. Set to
30 PSIG.
4. Confirm that any valves controlling the sample flow effluent to the low
pressure flare or atmospheric vent are open.
5. Turn on the purge supply to purge the system and clear any residual
process gases.
6. Open the low pressure flare or atmospheric vent header shut-off valve
for the effluent from the sample bypass.
7. Allow the analyzer to purge for 20 minutes.
8. Shut off the nitrogen purge and disconnect.
9. Close the low pressure flare or atmospheric vent header shut-off valve
for the effluent from the sample bypass.
10. Allow all residual gas to dissipate from the lines.
11. Turn off power and disconnect power to the system.
12. Confirm all digital/analog signals are turned off at the location from
which they are being monitored.
13. Disconnect all digital/analog wires from the system.
14. Disconnect the phase and neutral wires from the analyzer.
15. Disconnect the protective ground wire from the analyzer system.
16. Disconnect all tubing and signal connections.
Use a leak detector to determine any gas leak before opening
enclosure door.
Ensure the system is depressurized to ambient pressure
before continuing.
Confirm the power source is disconnected at the switch or
circuit breaker. Make sure the switch or breaker is in the
“OFF” position and locked with a padlock.

OXY5500 QF Gas Analyzer XA02754C
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17. Cap all inlets and outlets to prevent foreign material such as dust or
water from entering the system).
18. Ensure the analyzer is free from dust, oils or any foreign material → 
13.
19. Pack the equipment in the original packaging in which it was shipped,
if available. If the original packaging material is no longer available,
the equipment should be adequately secured (to prevent excessive
shock or vibration).
20. If returning the analyzer to the factory, complete the Decontamination
Form provided by Service →  14 and attach to the outside of the ship-
ping package as instructed before shipping.
Cleaning the
Instrument
The housing should be cleaned only with a moist cloth to avoid electro-static
discharge.
The SMA-fiber connector of the sensor can be cleaned only with a lint-free
cloth. The sensor tip may be rinsed only with distilled water or ethanol.
Never use benzene, acetone, alcohol or other organic
solvents.

XA02754C OXY5500 QF Gas Analyzer Safety Instruction
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5 Maintenance and Service
This chapter provides safety information related to maintenance and service
of the OXY5500 analyzer.
Fuse Ratings and
Characteristics
For an illustration of the fuse enclosure →  5–1. Instructions for replacing
a fuse can be found in the OXY5500 Operating Instruction →  1.
Table 5–1 Fuse specifications
Checking Filters The micron filter and membrane separator can be replaced in field. For full
instructions on replacing these filters, refer to the SCS Operating Instruction
(BA02196C) →  1.
1. Shut down the system following the procedure in “Shutting Down the
SCS” in the SCS Operating Instruction →  1.
2. Inspect, repair or replace the filter as required.
3. Restart the system. Refer to “Starting up the SCS” in the SCS Operating
Instruction →  1.
Service For Service in your area, refer to our website (https://www.endress.com/
contact) for the list of local sales channels.
Before contacting Service
Before contacting Service, prepare the following information to send with
your inquiry:
• Contact information
• Description of the problem or questions
Access to the information above will greatly expedite our response to your
technical request.
Use only the same type and rating of fuse for replacements.
Refer to the specifications listed in OXY5500 analyzer
specifications →  6.
Description Rating
Cartridge fuse, 216 Series, 5 x 20 mm, Fast
Act
800 mA,
250V
For service information →  14.