Manual: OCX 8800 O2 / Combustibles Transmitter General Purpose with Remote Electronics-Rev 1.2 | Rosemount
Table of contents
Loading...Rosemount Manual: OCX 8800 O2 / Combustibles Transmitter General Purpose with Remote Electronics-Rev 1.2 | Rosemount Manuals & Guides
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
Oxygen/Combustibles Transmitter
General Purpose OCX 8800 Oxygen/Combustibles Analyzer with Remote Electronics
http://www.raihome.com
HIGHLIGHTS OF CHANGES
Effective December 2007, Rev 1.1
Page/Section Summary
Throughout Updated manual number suffixes in page headers to indicate OCX configuration.
Changed references to HART Communicator te read Field Communicator in text and
illustrations.
Page 1-10 Added new illustration Figure 1-6
Page 1-14 Updated Product Matrices.
Page 1-15 Revised/updated Table 1-2 .
Page 2-2 Deleted obsolete CAUTION statement.
Page 2-14 Revised paragraph 4 listing of gases for calibration.
Page 2-18 Revised Figure 2-11 to indicate minimum pressure for actuation of the blowback valve.
Page 2-19 Revised Figure 2-12 to indicate minimum pressure for actuation of the blowback valve.
Page 4-4 Revised 1st paragraph.
Page 4-5 Revised HART menu items in Figure 4-3, Sheet 1 of 4
Page 4-9 Added new step 4 to both D/A Trim Procedures.
Page 5-2 Replaced steps 6 through 10 with a repeat of step 4 instruction.
Page 5-3 Revised steps 2 and 3.
Page 7-3 Revised "Ref Current Err" fault indication heading.
Page 7-7 Revised probable cause statements of "Cal Warning/Cal Failed" fault indication.
Page 8-5 Revised parts list for Sensor Housing Components.
Appendix A Updated multi-lingual safety pages.
Effective July 2008, Rev 1.2
Page/Section Summary
General Updated manual to synchronize revision levels.
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
Table of Contents
Essential Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
SECTION 1
escription and
D
Specifications
SECTION 2
Installation
SECTION 3
Configuration and
Startup
SECTION 4
Using HART
Communications
SECTION 5
alibration
C
Component Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Mechanical
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Pneumatic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Initial Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Verify Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Initial Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Set Test Gas Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
OCX 8800 Reset Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Field Communicator Signal Connections. . . . . . . . . . . . . . . . . . . . . . . 4-1
Field Communicator PC Connections . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
HART Menu Tree. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
D/A Trim Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Fully Automatic Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Operator - Initiated Autocalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Manual Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
SECTION 6
Maintenance and Service
http://www..raihome.com
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
OCX 8800 Removal
and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
OCX with
Remote Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Repair Sensor Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Sensor Housing Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Sensor Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Repair Electronics Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Electronics Housing Disassembly . . . . . . . . . . . . . . . . . . . . . . . . 6-28
OCX 8800
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Electronics Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30
Replace Tube Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Remove Tube Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Install Tube Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
SECTION 7
oubleshooting
Tr
SECTION 8
Replacement Parts
APPENDIX A
Safety Data
APPENDIX B
SPA with HART Alarm
APPENDIX C
eturn of Materials
R
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Electrical Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Electrostatic Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Total Power Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Diagnostic Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Alarm Relay Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
Sensor Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Electronics Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
O2 Cell and Heater Strut Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Safety Data Sheet for Ceramic Fiber Products . . . . . . . . . . . . . . . . . A-24
High Pressure Gas Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-30
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2
Returning Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C-1
TOC-2
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
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.
http://www..raihome.com
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
:EARTH(GROUND)TERMINAL
:PROTECTIVECONDUCTORTERMINAL
:RISKOFELECTRICAL SHOCK
:WARNING:REFERTOINSTRUCTIONBULLETIN
IM-106-880ASB, Rev 1.2
OCX 8800
July 2008
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
und throughout this publication.
fo
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.
SYMBOLS
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.
NOTE
Highlights an essential operating procedure, condition, or statement.
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.
ii
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
Section 1 Description and Specifications
Component Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-12
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.
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.
http://www..raihome.com
OCX 8800
4
6
1
37390076
2
o
HART Communicator
FISHER-ROSEMOUNT
TM
MAN4275A00
English
October1994
3
5
A
n
a
l
y
t
i
c
a
l
Figure 1-1. Typical System Package
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
1. Instruction Manual
2. Field 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 Remote Electronics
1-2
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
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 (P
Where:
1. P2 is the partial pressure of the oxygen in the measured gas on one side
of the cell.
2. P1 is 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.
1/P2
) + C
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.
1-3
OCX 8800
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
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 housing may be mounted up to 150 feet away from the sensor
housing.
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 O
concentration decreases.
2. HART communication is standard. To use the HART capability, you
must have either:
a. Model 275/375 Field 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.
cell output voltage and sensitivity increase as the oxygen
2
1-4
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
5. An operator can calibrate and diagnostically troubleshoot the OCX 8800
using the 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 4, 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 O
the COe sensor. Dilution air is provided to the COe sensor and reference air
to the O2 sensor. After the gas sample flows past the O2 sensor 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.
sensor and continues on to
2
1-5
OCX 8800
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
ELECTR
ONICS
HOUSING
Flow Meter
7 scfh
37390001
Sample
Gas
Power
Supply
Figure 1-2. System Operation Diagram
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Handling the OCX 8800
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.
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.
1-6
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
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. Figure 1-6 shows the
dimensions for the optional sample tube support.
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 (8 5°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
1-7
OCX 8800
OCX 8800 with
REMOTE
ELECTRONICS
4-20 mA Outputs
(2 Twisted Pairs)
Heater
P
ower Cable
[up to 150 ft (46 m)]
Pressure
Regulator
Duct
Stack
Gases
Line Voltage
Signal Cable
[up to 150 ft (46 m)]
37390064
Low O Test Gas
2
High O Test Gas
2
CO Test Gas
Instrument Air
Supply
(Ref
erence Gas)
Test Gas
Flow Meter
Dilution
Air
Flow
Meter
Figure 1-4. Typical System
Installation
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Figure 1-5. OCX 8800 HART
1-8
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Connections and AMS Application
OCX 8800
1-9
OCX 8800
Figure 1-6. Sample Tube Support
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
1-10
Instruction Manual
OCX 8800 with
REMOTE
ELECTRONICS
4-20 mA Outputs
(2 Twisted Pairs)
Heater
P
ower Cable
[up to 150 ft (46 m)]
Pressure
Regulator
Duct
Stack
Gases
Line Voltage
Signal Cable
[up to 150 ft (46 m)]
37390064
Low O Test Gas
2
High O Test Gas
2
CO Test Gas
Instrument Air
Supply
(Ref
erence Gas)
Test Gas
Flow Meter
Dilution
Air
Flow
Meter
IM-106-880ASB, Rev 1.2
July 2008
Figure 1-7. Typical System
Installation
OCX 8800
1-11
OCX 8800
SPECIFICATIONS General Purpose OCX
Specifications
Net O2 Range 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), ambie nt
Electronics Housing -40° to 149°F (-40° to 65°C), ambient
Nominal and Approximate
Shipping Weights
18 in. (457 mm)
probe package
3 ft (0.91 m) probe
package
6 ft (1.83 m) probe
package
9 ft (2.74 m) probe
package
Mounting and Mounting
Positions
Sensors Housing Flange
Electronics Housing Wall/Pipe
Materials
Probes 316L stainless steel - 1300°F (704°C)
Enclosures Low-copper aluminum
Calibration Semi-automatic or automatic
Calibration Gas Mixtures
Recommended
(Ref. test gas bottles
kit #1A99119G04)
Calibration Gas Flow 7 scfh (3.3 l/m)
Reference Air 2 scfh (1 l/m), clean, dry instrument-quality air (20.95% O2),
Eductor Air 5 scfh (2.5 l/m), clean, dry, instrument-quality air 20.95% O2),
Dilution Air 0.1 scfh (0.5 l/m), clean, dry, instrument-quality air (20.95% O2)
Blowback Air (optional) Clean, dry, instrument-quality air (20.95% O2), regulated to 55 psi
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
-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
54 lbs (20 kg)
55 lbs (20.5 kg)
57 lbs (21 kg)
59 lbs (22 kg)
Inconel 600 - 1832°F (1000°C)
Ceramic - 2600°F (1427°C)
0.4% O2, Balance N2
8% O2, Balance N2
1000 ppm CO, Balance Air
regulated to 35 psi (241 kPa)
regulated to 35 psi (241 kPa)
regulated to 35 psi (241 kPa)
(379 kPa)
Table continued on next page
1-12
Instruction Manual
APPROVED
CUS
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
Specifications
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
Electrical Noise EN 61326-1, Class A
Certifications
Line Voltage Universal 100 to 240 VAC ±10%, 50 to 60 Hz, no switches or
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, 30mA, 30VDC capacity
Power Consumption 750 W maximum
Mounting and Mounting
Positions
Sensor Housing Flange
Electronics Housing Wall/Pipe
NOTE
ll static performance characteristics are with operating variables constant. Specifications subject to change
A
without notice.
clean, dry atmosphere, two 3/4-14 NPT conduit ports
jumpers required, 3/4-14 NPT conduit port
1-13
Instruction Manual
IM-106-880ASB, Rev 1.2
OCX 8800
Table 1-1. Product Matrix - General Purpose OCX 8800
OCX88A O2/Combustibles Transmitter
Code Probe Length and Material
00 No Probe or Exhaust Tube
11 18 in. (457 mm) 316 SST up to 1300°F (704°C) (3)
21 18 in. (457 mm) Inconel 600 up to 1832°F (1000°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) (3)
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) (3)
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) (3)
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
5 Model 132 Adapter Plate
Code Mounting Hardware - Probe Side
0 No Adapter Plate
1 Probe Only (ANSI)
2 Probe Only (DIN)
OCX88A 11 10 1 1 H3 06 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)
For use with stainless steel sample tube only.
(3)
For high temperature applications that require a filter, please order 1A99762H03 separately.
(1)
Code Electronics Housing - Communications
H1 HART Communications
H2 HART Communications with Local Operator Interface
H3 HART Communications with Calibration Solenoids
H4 HART Communications with Local Operator Interface and Calibration Solenoids
Code Electronics Mounting
01 Integral to Sensor Housing
02 Remote Electronics and no cable
03 Remote Electronics and 20 ft (6 m) cable
04 Remote Electronics and 40 ft (12 m) cable
05 Remote Electronics and 60 ft (18 m) cable
06 Remote Electronics and 80 ft (24 m) cable
07 Remote Electronics and 100 ft (30 m) cable
08 Remote Electronics and 150 ft (46 m) cable
Code Accessories
00 None
01 Flow meters & Ref. Air Set
02 In-Situ Filter (Stainless Steel only) (2)
03 In-Situ Filter (SST), Flow meters & Ref. Air Set (2)
11 Flow meters, and Ref. Air Set with Blowback
12 In-Situ Filter (SST) with Blowback (2)
13 In-Situ Filter (SST), Flow meters & Ref. Air Set with Blowback (2)
July 2008
1-14
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Table 1-2. Accessories
PART NUMBER DESCRIPTION
1A99119H01 Oxygen test gas bottle; 0.4% O2, balance N
1A99119H02 Oxygen test gas bottle; 8.0% O2, balance N
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
1A99339H03 Blowback valve, air operated
1A99762H03 Hasteloy In Situ Filter, High Temperature
1A99784H02
6A00171G01 Power line filter kit
6A00288G01 Sample Tube Support, 18 in. (457 mm)
6A00288G02 Sample Tube Support, 3 Ft. (0.91 m)
6A00288G02 Sample Tube Support, 6 Ft. (1.83 m)
6A00288G04 Sample Tube Support, 9 Ft. (2.7 m)
6P00162H02 Flange Insulator
Moore Industries SPA for Low O2 Alarm, High COe Alarm,
Calibration Status, and Unit Fail
375 Field Communicator with 12 Megabyte buffer,
model no. 375HR1EKLU
OCX 8800
2
2
1-15
OCX 8800
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
1-16
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Section 2 Installation
Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-8
Pneumatic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-14
Initial Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-20
Before installing this equipment, read the "Safety instructions for the wiring and installation
of this apparatus" in Appendix A: Safety Data. Failure to follow the safety instructions could
result in serious injury or death.
OCX 8800
The OCX88A can be installed in general purpose areas only. Do not install the OCX88A in
hazardous areas.
http://www..raihome.com
OCX 8800
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
MECHANICAL INSTALLATION
Selecting Location
1. The location of the OCX 8800 in the stack or flue is most important for
maximum accuracy in the oxygen analyzing process. The probe must
be positioned so the gas it measures is representative of the process.
Best results are normally obtained if the transmitter is positioned near
the center of the duct (40-60% insertion). Longer ducts may require
several transmitters since the oxygen and combustibles can vary due to
stratification. A point too near the wall of the duct or the inside radius of
a bend, may not provide a representative sample because of the very
low flow conditions. The sensing point should be selected so the
process gas temperature falls within the range of probe material used.
Figure 2-1 through Figure 2-4 provide mechanical installation
references. The ambient temperature inside the electronics housing
must not exceed 185°F (85°C).
2. Check the flue or stack for holes and air leakage. The presence of this
condition will substantially affect the accuracy of the oxygen and
combustibles readings. Therefore, either make the necessary repairs or
install the transmitter up stream of any leakage.
3. Ensure the area is clear of internal and external obstructions that will
interfere with installation and maintenance access to the unit. Allow
adequate clearance for the removal of the OCX 8800.
Do not allow the temperature of the electronics housing to exceed 185°F (85°C) or damage
to the electronics may result.
Whenever a positive stack pressure exists at the installation site, be sure to connect all
pneumatic lines prior to installing the OCX 8800 in the stack or ductwork. Failure to connect
the pneumatic lines can allow the flow of contaminants into the OCX 8800 ports.
Installation
1. Ensure all components are available to install the OCX 8800.
2. The OCX 8800 may be installed intact as it is received.
3. Weld or bolt adapter plate (Figure 2-2) onto the duct.
4. Use the pipe or wall mounting hardware as shown in Figure 2-3 to
mount the electronics housing. Choose a location not to exceed the
length of the electronics cable ordered.
5. Ensure the conduits drop vertically from the OCX 8800 and the conduit
is routed below the level of the conduit ports on the housing to form a
drip loop. Drip loops minimize the possibility that moisture will damage
the electronics (Figure 2-4).
6. Where a positive stack pressure exists at the installation site, connect all
pneumatic lines prior to installing the OCX 8800 in the stack or
ductwork.
2-2
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
OCX 8800
NOTE
If process temperatures will exceed 392°F (200°C), use anti-seize compound
on stud threads to ease future removal of the OCX 8800.
7. Insert sample and exhaust tubes through the opening in the mounting
flange and bolt the unit to the flange.
Uninsulated stacks or ducts may cause ambient temperatures in the electronics housing to
exceed 185°F (85°C) and damage the electronics.
8. If insulation is removed to access the duct for OCX 8800 mounting,
make sure to replace insulation afterward.
Enclosures
The OCX 8800 enclosures are designed to meet ingress conditions of IP66.
Each enclosure cover is threaded to its base and sealed with an o-ring that
isolates the threads from external contaminants.
Each cover is secured by a clip attached to the base that engages the cover
between the ribs of the cover sidewall. The clip is held in place by an Allen
head cap screw and lockwasher mounted in a recess. Cover removal and
installation requires an Allen wrench to loosen and tighten the screw.
2-3
OCX 8800
B.C. Dia.
Removal Envelope
Dim “B”
37390009
Insertion Depth
Dim “A”
Flange Dia.
Hole Dia.
8.3
(211)
Allow 9 in.
(229 mm) for
Cover Removal
See Table 1
Optional
In Situ FIilter
Heater Power Cable
Signal Cable
Heater Power Cable
Signal Cable
ELECTRONICS HOUSING
SENSOR HOUSING
See Table 2
All dimensions are in inches with millimeters in parentheses.
NOTE
Insulate if exposed to adverse weather or extreme temperature
changes, install a protective housing and/or insulation
around the unit.
Flange
Dia.
DIN
ANSI
5R10244H025R10244H01
6.00
(152)
Table 1. Mounting Flange
Hole
Dia.
(4) Holes
equally
spaced on
B
.C
. dia
7.28
(185)
0.75
(19)
0.71
(18)
4.75
(121)
5.71
(145)
Dim "B”
3 ft
9 ft
6 ft
Probe
18 in.
Dim "A”
(2235)
88
(3150)
124
(2743)
108
72
(1829)
(914)
36
(1321)
52
(864)
34
(457)
18
Table 2. Installation/Removal
3535B18H02
3535B45H01
DIN
ANSI
0.06 In. Thick Gasket
Figure 2-1. Installation, OCX 8800
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
2-4
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
Figure 2-2. Adapter Plate Installation
OCX 8800
2-5
OCX 8800
37020021
*Pipe
Mounting
Clamp
Electronics
Housing
*Wall or Pipe
Mounting Bracket
and Screws
1/4-20 UNC x 2 in. M-F Standoffs.
Recommended for rear piping
clearance when wall mounting.
(4 each by customer)
Wall Mounting Bolts
or Lag Screws
(4 each by customer)
* Indicates items are included
in mounting kit P/N 4851B40G01.
Note:
Figure 2-3. Wall or Pipe Mounting
of Electronics Housing
Instruction Manual
IM-106-880ASB, Rev 1.2
July 2008
2-6
Loading...