Emerson Rosemount OCX 8800 User manual

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Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
Oxygen/Combustibles Transmitter
Hazardous Area OCX 8800 Oxygen/Combustibles Transmitter
with Integral Electronics and Local Operator Interface

HIGHLIGHTS OF CHANGES
Effective January, 2007 Rev 1.0
Page Summary
Page 2-19 Revised Figure 2-11.
Page 3-2 Revised the text for SW1 and SW2 to read internally powered.
Page 3-3 Revised Figure 3-1. Updated the paragraph Initial Power Up.
Page A-2 thru A-23 Added note 11 to the safety data section. Added additional pages/languages.
Page C-1 Updated the return of materials address.
Back cover Updated the address blocks.

Instruction Manual
IM-106-880, Rev 1.0
January 2007 OCX 8800
http://www.raihome.com
Table of Contents
Essential Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
SECTION 1
Description and
Specifications
Component Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
SECTION 2
Installation
Mechanical
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Pneumatic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Initial Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
SECTION 3
Configuration and
Startup
Verify Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Initial Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Set Test Gas Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
OCX 8800 Reset Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
SECTION 4
Using the LOI
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Display Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
LOI Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
LOI Key Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
LOI Status Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
LOI Menu Tree. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
D/A Trim Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
SECTION 5
Using HART
Communications
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
HART Communicator Signal Connections. . . . . . . . . . . . . . . . . . . . . . 5-1
HART Communicator PC Connections . . . . . . . . . . . . . . . . . . . . . . . . 5-4
HART Menu Tree. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
D/A Trim Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
SECTION 6
Calibration
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Fully Automatic Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Operator - Initiated Autocalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Manual Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
TOC-2
SECTION 7
Maintenance and Service
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
OCX 8800 Removal
and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
OCX with
Integral Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Repair Sensor Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Sensor Housing Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Sensor Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15
Repair Electronics Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-25
Electronics Housing Disassembly . . . . . . . . . . . . . . . . . . . . . . . . 7-25
Electronics Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28
Replace Tube Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-31
Remove Tube Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-31
Install Tube Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32
SECTION 8
Troubleshooting
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Electrical Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Electrostatic Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Total Power Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Diagnostic Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Alarm Relay Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
SECTION 9
Replacement Parts
Sensor Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Electronics Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
O2 Cell and Heater Strut Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
APPENDIX A
Safety Data
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Safety Data Sheet for Ceramic Fiber Products . . . . . . . . . . . . . . . . . A-24
High Pressure Gas Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-29
Atex Clarification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-31
APPENDIX B
SPA with HART Alarm
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
APPENDIX C
Return of Materials
Returning Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1

Instruction Manual
IM-106-880, Rev 1.0
January 2007 OCX 8800
http://www.raihome.com
OCX 8800
Oxygen/Combustibles Transmitter
ESSENTIAL
INSTRUCTIONS
READ THIS PAGE BEFORE PROCEEDING!
Emerson Process Management designs, manufactures and tests its products
to meet many national and international standards. Because these
instruments are sophisticated technical products, you MUST properly install,
use, and maintain them to ensure they continue to operate within their
normal specifications. The following instructions MUST be adhered to and
integrated into your safety program when installing, using, and maintaining
Emerson’s Rosemount Analytical products. Failure to follow the proper
instructions may cause any one of the following situations to occur: Loss of
life; personal injury; property damage; damage to this instrument; and
warranty invalidation.
•Read all instructions prior to installing, operating, and servicing the
product.
• If you do not understand any of the instructions, contact your
Emerson Process Management representative for clarification.
•Follow all warnings, cautions, and instructions marked on and
supplied with the product.
•Inform and educate your personnel in the proper installation,
operation, and maintenance of the product.
•Install your equipment as specified in the Installation Instructions
of the appropriate Instruction Manual and per applicable local and
national codes.Connect all products to the proper electrical and
pressure sources.
• To ensure proper performance, use qualified personnel to install,
operate, update, program, and maintain the product.
• When replacement parts are required, ensure that qualified people use
replacement parts specified by Emerson Process Management.
Unauthorized parts and procedures can affect the product's
performance, place the safe operation of your process at risk, and
VOID YOUR WARRANTY. Look-alike substitutions may result in fire,
electrical hazards, or improper operation.
• Ensure that all equipment doors are closed and protective covers
are in place, except when maintenance is being performed by
qualified persons, to prevent electrical shock and personal injury.
The information contained in this document is subject to change without
notice.
If a Model 275/375 Universal HART®Communicator is used with this unit, the software
within the Model 275/375 may require modification. If a software modification is required,
please contact your local Emerson Process Management Service Group or National
Response Center at 1-800-654-7768.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
ii
PREFACE The purpose of this manual is to provide a comprehensive understanding of
the OCX 8800 components, functions, installation, and maintenance.
We recommend that you thoroughly familiarize yourself with the Introduction
and Installation sections before installing your transmitter.
The introduction presents the basic principles of the transmitter along with its
performance characteristics and components. The remaining sections contain
detailed procedures and information necessary to install and service the
transmitter.
Before contacting Emerson Process Management concerning any questions,
first consult this manual. It describes most situations encountered in your
equipment's operation and details necessary action.
DEFINITIONS The following definitions apply to WARNINGS, CAUTIONS, and NOTES
found throughout this publication.
NOTE
Highlights an essential operating procedure, condition, or statement.
SYMBOLS
NOTE TO USERS
The number in the lower right corner of each illustration in this publication is a
manual illustration number. It is not a part number, and is not related to the
illustration in any technical manner.
Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not
strictly observed, could result in injury, death, or long-term health hazards of personnel.
Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not
strictly observed, could result in damage to or destruction of equipment, or loss of
effectiveness.
: EARTH (GROUND) TERMINAL
: PROTECTIVE CONDUCTOR TERMINAL
: RISK OF ELECTRICAL SHOCK
: WARNING: REFER TO INSTRUCTION BULLETI
N

Instruction Manual
IM-106-880, Rev 1.0
January 2007 OCX 8800
http://www..raihome.com
Section 1 Description and Specifications
Component Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-9
COMPONENT
CHECKLIST
A typical OCX 8800 Oxygen/Combustibles Transmitter package should
contain the items shown in Figure 1-1.
Use the product matrix in Table 1-1 at the end of this section to verify your
order number. The first part of the matrix defines the model. The last part
defines the various options and features of the OCX 8800. Check the model
number against the transmitter features and options, making sure options
specified by this number are on or included with the unit. Use this complete
model number for any correspondence with Emerson Process Management.
A list of accessories for use with the OCX 8800 is provided in Table 1-2.
SYSTEM OVERVIEW Scope
This Instruction Manual supplies details needed to install, startup, operate,
and maintain the OCX 8800. Signal conditioning electronics outputs separate
4-20 mA signals representing oxygen (O2) and combustibles (COe) values.
This information, plus additional details, can be accessed with the HART
Model 275/375 handheld communicator or Rosemount Analytical AMS
software. The local operator interface (LOI) also provides a communications
interface with the electronics.
System Description
The OCX 8800 is designed to measure oxygen and combustible
concentrations in flue gas temperatures up to 2600°F (1427°C). Electrical
connections, power and communications are made through two 3/4 NPT ports
in the flameproof electronics enclosure using fittings and cables provided by
the customer. Cable installation must meet NEC, IEC and/or other applicable
national or local codes for Class I, Zone 1, Group IIB +H2 T3/T6 permanently
mounted equipment. The transmitter is close coupled to the process and
requires minimal sample conditioning requirements.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
1-2
Figure 1-1. Typical System Package
1. Instruction Manual
2. HART®Communicator Package (optional)
3. Adapter Plate with Mounting Hardware and Gasket
4. Reference Air and Calibration Set
5. Blowback Hardware (optional)
6. OCX 8800 with Integral Electronics
4
6
1
37390006
2
o
HART Communicator
FISHER-ROSEMOUNT
TM
MAN 4275A00
English
October 1994
3
5
Analytica
l

Instruction Manual
IM-106-880, Rev 1.0
January 2007
1-3
OCX 8800
The equipment measures oxygen percentage by reading the voltage
developed across a heated electrochemical cell, which consists of a small
yttria-stabilized, zirconia disc. Both sides of the disc are coated with porous
metal electrodes. When operated at the proper temperature, the millivolt
output of the cell is given by the following Nernst equation:
EMF = KT log10 (P1/P2) + C
Where:
1. P2is the partial pressure of the oxygen in the measured gas on one side
of the cell.
2. P1is the partial pressure of the oxygen in the reference air on the
opposite side of the cell.
3. T is the absolute temperature.
4. C is the cell constant.
5. K is an arithmetic constant.
NOTE
For best results, use clean, dry instrument air (20.95% oxygen) as the
reference air.
When the cell is at operating temperature and there are unequal oxygen
concentrations across the cell, oxygen ions will travel from the high oxygen
partial pressure side to the low oxygen partial pressure side of the cell. The
resulting logarithmic output voltage is approximately 50 mV per decade. The
output is proportional to the inverse logarithm of the oxygen concentration.
Therefore, the output signal increases as the oxygen concentration of the
sample gas decreases. This characteristic enables the OCX 8800 to provide
exceptional sensitivity at low oxygen concentrations.
The OCX 8800 measures net oxygen concentration in the presence of all the
products of combustion, including water vapor. Therefore, it may be
considered an analysis on a "wet" basis. In comparison with older methods,
such as the portable apparatus, which provides an analysis on a "dry" gas
basis, the "wet" analysis will, in general, indicate a lower percentage of
oxygen. The difference will be proportional to the water content of the
sampled gas stream.
The OCX 8800 combustibles sensor is a catalytic sensor consisting of two
Resistance Devices (RTD). One RTD is the reference element covered with
an inert coating. The other RTD element is active, coated with a catalyst. As
the sample gases flow by the sensor, the combustible gases oxidize on the
surface of the active element. The oxidation that occurs produces heat and a
temperature rise in the active element. The temperature difference produces
a resistance relationship between the two elements that is directly
proportional to the concentration of combustibles in the sample gases.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
1-4
The catalyst is specifically designed to detect carbon monoxide (CO), but the
sensor responds to other combustible gases. The sensor is calibrated using
CO, thus the output should be expressed in terms of CO. However, since the
sensor detects other combustible gases, the output cannot just be labeled
CO. The response of the sensor to other combustible gases gives an output
that is equivalent to the sensor detecting CO. The term COe is used in this
manual to describe the sensor output. This term indicates that the sensor is
calibrated in terms of CO, and that the sensor output is equivalent to CO but
not specific to CO.
Dilution air is provided to the COe sensor to ensure there is adequate oxygen
to fully oxidize any combustible gases regardless of the concentration of
oxygen in the process.
System Configuration
Transmitters are available in four lengths, giving the user the flexibility to use
a penetration appropriate to the size of the stack or duct. The length options
are 18 in. (457 mm), 3 ft (0.91 m), 6 ft (1.83 m), or 9 ft (2.7 m). Probes are
available in three material options, 316L stainless steel, inconel 600, and
ceramic to accommodate higher temperatures.
The electronics are contained in a separate housing from the sensors. The
electronics and sensor housings are integrally mounted.
The electronics control both sensor temperatures and provide individual 4-20
mA isolated outputs that are proportional to the measured oxygen and
combustibles concentrations. The power supply can accept voltages of 100 to
240 VAC and 50 to 60 Hz. The electronics accepts millivolt signals generated
by the sensors and produces the outputs to be used by remotely connected
devices. The outputs are isolated 4-20 mA linearized currents. Refer to
Section 3, Configuration and Startup for specific instructions upon initial
power up.
System Features
1. The O2cell output voltage and sensitivity increase as the oxygen
concentration decreases.
2. HART communication is standard. To use the HART capability, you
must have either:
a. HART Model 275/375 Communicator.
b. AMS software for the PC.
3. Oxygen cell and heater/thermocouple assembly are field replaceable.
4. Electronics are automatically configured for line voltages from 100 to
240 VAC.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
1-5
OCX 8800
5. An operator can calibrate and diagnostically troubleshoot the OCX 8800
in one of two ways:
a. LOI. The LOI is mounted to the end of the electronics module and
allows local communications with the electronics. Refer to Section 4,
Using the LOI, for more information.
b. Optional HART Interface. Each of the OCX 8800's 4-20 mA output
lines transmit an analog signal proportional to oxygen or combustible
levels detected. The HART output is superimposed on the oxygen
4-20 mA output line only. This information can be accessed through
the following:
• Model 275/375 Handheld Communicator - The handheld
communicator requires Device Description (DD) software specific
to the OCX 8800. The DD software will be supplied with many
Model 275/375 units, but can also be programmed into existing
units at most Emerson Process Management service offices.
Refer to Section 5, Using HART Communications, for additional
information.
• Personal Computer (PC) - The use of a personal computer
requires AMS software available from Emerson Process
Management.
• Selected Distributed Control Systems - The use of distributed
control systems requires input/output (I/O) hardware and AMS
software which permit HART communications.
6. Optional Blowback System. The blowback system periodically blows
instrument air back through the sample line filter and out the sample
tube. This clears out particulate and keeps the sample line filter from
clogging.
System Operation
Figure 1-2 shows the relationship between the components of the OCX 8800.
The sensors and the electronics are contained in separate housings. The
sensor housing and probe mounts to a duct or process wall so that the probe
protrudes into the flue gas stream. An air powered eductor continuously pulls
samples of the process flue gas through the probe to a chamber in front of the
sensor housing where the sample passes the O2sensor and continues on to
the COe sensor. Dilution air is provided to the COe sensor and reference air
to the O2sensor. After the gas sample flows past the O2sensor and through
the COe sensor, it is drawn through the eductor where it mixes with the
eductor air and exits through exhaust back into the system. The electronics
housing contains the CPU and HART boards which convert the sensor inputs
into 4-20 mA analog output signals. The CPU can also initiate and perform
calibrations. Three test gasses and instrument air can be turned on and off by
solenoids. Test gas flow to the sensors is regulated by a flow meter between
the electronics and sensor housings. Instrument air is separated into eductor
air, reference air, and dilution air. The instrument air solenoid does not allow
air flow until the heaters are up to temperature. This minimizes the amount of
sampled process flue gas being pulled into cold sensors causing
condensation.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
1-6
Figure 1-2. System Operation Diagram
Handling the OCX 8800
System Considerations
Prior to installing your OCX 8800, make sure you have all the components
necessary to make the system installation. Ensure all the components are
properly integrated to make the system functional.
Low O
Test Gas
2
COe
Combustibles
Sensor
O
Sensor
2
Eductor
Probe
Exhaust
CPU
HART
Board
Optional
Test Gas
Solenoids
Instrument Air
Solenoid
High O
Test Gas
2
CO
Test Gas
Instrument
Air
Dilution Air
Reference Air
Eductor Air
Flow Meter
50 cc/min.
(
0.1 scfh
)
SENSOR
HOUSING
ELECTRONICS
HOUSING
Flow Meter
7 scfh
37390001
Sample
Gas
Power
Supply
It is important that printed circuit boards and integrated circuits are handled only when
adequate antistatic precautions have been taken to prevent possible equipment damage.
The OCX 8800 is designed for industrial application. Treat each component of the system
with care to avoid physical damage. The probe may contain components made from
ceramics, which are susceptible to shock when mishandled.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
1-7
OCX 8800
After verifying that you have all the components, select mounting locations
and determine how each component will be placed in terms of available line
voltage, ambient temperatures, environmental considerations, convenience,
and serviceability. Figure 1-3 shows a typical system wiring. Simplified
installations for the OCX 8800 are shown in Figure 1-4.
A source of instrument air is required at the OCX 8800 for reference air,
dilution air, and eductor air. Since the OCX 8800 is equipped with an in-place
calibration feature, provision should be made for connecting test gas tanks to
the OCX 8800 when it is to be calibrated.
NOTE
The electronics module is designed to meet NEMA 4 (IP66) and the electronic
components are rated to temperatures up to 185°F (85°C).
Retain packaging in which the unit arrived from the factory in case any
components are to be shipped to another site. This packaging has been
designed to protect the product.
Figure 1-3. OCX 8800 HART
Connections and AMS Application
37390002
4-20 mA Output
(Twisted Pairs)
Instrument
Air
3 calibration
gas lines by
customer
[300 ft (91 m) max.)
OCX 8800 with
Integral Electronics
HART
Model 275/375
Handheld
Communicator
Customer’s Laptop
with AMS
Termination in
Control Room
AMS

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
1-8
Figure 1-4. Typical System
Installation
4-20 mA Outputs
(2 Twisted Pairs)
Stack
OCX 8800 with
INTEGRAL
ELECTRONICS
Duct
Gases
Line Voltage
Adapter
Plate
Pressure
Regulator
37390063
Test Gas
Flow Meter
Low O Test Gas
2
High O Test Gas
2
Dilution
Air
Flow
Meter
CO Test Gas
Instrument Air
Supply
(Reference Gas)

Instruction Manual
IM-106-880, Rev 1.0
January 2007
1-9
OCX 8800
SPECIFICATIONS Hazardous Area OCX
Specifications
Net O2Range 0-1% to 0-40% O2, fully field selectable
Combustibles 0-1000 ppm to 0-5%, fully field selectable
Accuracy
Oxygen ± 0.75% of reading or 0.05% O2(whichever is greater)
Combustibles ± 2% range
System Response to
Test Gas
Oxygen 10 sec T90
Combustibles 25 sec T90
Temperature Limits
Process 32° to 2600°F (0° to 1427°C)
Sensors Housing -40° to 212°F (-40° to 100°C), ambient
Electronics Housing -40° to 149°F (-40° to 65°C), ambient
-40° to 185°F (-40° to 85°C), internal - operating temperature of
electronics inside instrument housing, as measured by a HART
communicator or AMS software
Local Operator
Interface
-40° to 158°F (-40° to 70°C), ambient
[At temperatures above 158°F (70°C) inside instrument housing,
the infrared keypad will cease to function, but the OCX 8800 will
continue to operate properly.]
Nominal and Approximate
Shipping Weights
18 in. (457 mm)
probe package
54 lbs (20 kg)
3 ft (0.91 m) probe
package
55 lbs (20.5 kg)
6 ft (1.83 m) probe
package
57 lbs (21 kg)
9 ft (2.74 m) probe
package
59 lbs (22 kg)
Housings Mounting Flange
Materials
Probes 316L stainless steel - 1300°F (704°C)
Inconel 600 - 1832°F (1000°C)
Ceramic - 2600°F (1427°C)
Enclosures Low-copper aluminum
Calibration Semi-automatic or automatic
Calibration Gas Mixtures
Recommended
(Ref. test gas bottles
kit #1A99119G04)
0.4% O2, Balance N2
8% O2, Balance N2
1000 ppm CO, Balance Air
Calibration Gas Flow 7 scfh (3.3 l/m)
Reference Air 2 scfh (1 l/m), clean, dry instrument-quality air (20.95% O2),
regulated to 45 psi (310 kPa)
Eductor Air 5 scfh (2.5 l/m), clean, dry, instrument-quality air 20.95% O2),
regulated to 45 psi (310 kPa)
Dilution Air 0.1 scfh (0.5 l/m), clean, dry, instrument-quality air (20.95% O2)
regulated to 45 psi (310 kPa)
Blowback Air (optional) Clean, dry, instrument-quality air (20.95% O2), regulated to 55 psi
(379 kPa)
Table continued on next page

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
1-10
NOTE
All static performance characteristics are with operating variables constant. Specifications subject to change
without notice.
Sensors Housing NEMA 4, IP66 with fitting and pipe on reference exhaust port to
clean, dry atmosphere, two 3/4-14 NPT conduit ports
Electronics Housing NEMA 4, IP66 with fitting and pipe on reference exhaust port to
clean, dry atmosphere, two 3/4-14 NPT conduit ports
Electrical Noise EN 61326-1, Class A
Certifications Sensor Housing
Electronics Housing
Line Voltage Universal 100 to 240 VAC ±10%, 50 to 60 Hz, no switches or
jumpers required, 3/4-14 NPT conduit port
Pollution Degree 2
Over Voltage Category II
Relative Humidity 5 to 95% (non-condensing)
Isolated Output
Oxygen 4-20 mAdc, 950 ohm maximum, with HART capability
Combustibles 4-20 mAdc, 950 ohm maximum
Alarm Alarm output relay - dry contact, form C, 30 mA, 30VDC capacity
Power Consumption 750 W maximum
Specifications
KEMA 04 ATEX 2308
EEx d IIB+H2 T3
0344 II 2 G
2005.1602514
CLASS 1, ZONE 1
Ex d IIB+H2 T3
AEx D IIB+H2 T3
TYPE 4 / IP66
APPROVED
CLASS 1, ZONE 1
AEx D IIB+H2 T3
TYPE 4 / IP66
CUS
2005.1602514
CLASS 1, ZONE 1
Ex d IIB+H2 T6
AEx D IIB+H2 T6
TYPE 4 / IP66
KEMA 04 ATEX 2308
EEx d IIB+H2 T6 IP66
0344 II 2 G
CLASS 1, ZONE 1
AEx D IIB+H2 T3
TYPE 4 / IP66
APPROVED
CUS

Instruction Manual
IM-106-880, Rev 1.0
January 2007
1-11
OCX 8800
Table 1-1. Product Matrix - Hazardous Area OCX 8800
OCX88C O2/Combustibles Transmitter - Flameproof
Code Probe Length and Material
00 No Probe or Exhaust Tube
11 18 in. (457 mm) 316 SST up to 1300°F (704°C)
21 18 in. (457 mm) Inconel 600 up to 2600°F (1427°C)
31 18 in. (457 mm) Ceramic up to 2600°F (1427°C)
12 3 ft (0.91 m) 316 SST up to 1300°F (704°C)
22 3 ft (0.91 m) Inconel 600 up to 1832°F (1000°C)
32 3 ft (0.91 m) Ceramic up to 2600°F (1427°C)
13 6 ft (1.83 m) 316 SST up to 1300°F (704°C)
23 6 ft (1.83 m) Inconel 600 up to 1832°F (1000°C)
14 9 ft (2.7 m) 316 SST up to 1300°F (704°C)
24 9 ft (2.7 m) Inconel 600 up to 1832°F (1000°C)
Code Probe Mounting Assembly
10 (ANSI 2 in. 150 lb) 6" dia. flange, 4.75" BC with 4 x 0.75" dia. holes
20 (DIN) 185 mm dia. flange, 145 mm BC with 4 x 18 mm dia. holes
Code Mounting Hardware - Stack Side
0 No Adapter Plate (“0” must be chosen under “Mounting Adapter - Probe Side” below)
1 New Installation - Square weld plate with studs
2 Model 218/240 Mounting Plate (with Model 218/240 Shield Removed)
3 Existing Model 218/240 Support Shield
4 Special Mounting (1)
5 Model 132 Adapter Plate
Code Mounting Hardware - Probe Side
0 No Adapter Plate
1 Probe Only (ANSI)
2 Probe Only (DIN)
Code Electronics Housing - Communications
H1 HART Communications(2)
H2 HART Communications with LOI
H3 HART Communications with Calibration Solenoids(2)
H4 HART Communications with LOI and Calibration Solenoids
Code Electronics Mounting
02 Remote Electronics and no cable
Code Accessories
00 None
01 Flow meters & Ref. Air Set
02 In-Situ Filter (Stainless Steel only)
03 In-Situ Filter (SST), Flow meters & Ref. Air Set
11 Flow meters, and Ref. Air Set with Blowback
12 In-Situ Filter (SST) with Blowback
13 In-Situ Filter (SST), Flow meters & Ref. Air Set with Blowback
OCX88C 11 10 1 1 H2 02 02 Example
NOTES:
(1) Provide details of the existing mounting plate as follows:
Plate with studs Bolt circle diameter, number, and arrangement of studs, stud thread, stud height above mounting plate.
Plate without studs Bolt circle diameter, number, and arrangement of holes, thread, depth of stud mounting plate with accessories.
(2) If the LOI is not implemented, remote access and functionality available via HART Communications (Model 275/375 Handheld Communicator)
with Oxygen/Combustibles Device Description (DD) required.

Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
1-12
Table 1-2. Accessories
PART NUMBER DESCRIPTION
1A99119H01 Oxygen test gas bottle; 0.4% O2, balance N2
1A99119H02 Oxygen test gas bottle; 8.0% O2, balance N2
1A 99119H07 CO test gas bottle; 1000 ppm CO, balance air
1A99120H02 Regulator for Oxygen (may need 2)
1A99120H03 Regulator for CO test gas
1A99119G06 Wall mount bracket for test gas bottles
1A99119G05 Test gas regulators kit
1A99119G04 Test gas bottles kit
1A99292H01 Moore Industries SPA for Low O2Alarm, High COe Alarm,
Calibration Status, and Unit Fail
1A99339H03 Blowback valve, air operated
4851B40G01 Wall or Pipe Mounting Kit
1A99784H02 375 HART Communicator with 12 Megabyte buffer,
model no. 375HR1EKLU
6A00171G01 Power line filter kit