Reference Manual
00809-0100-4882, Rev AB
June 2019
Rosemount
TM
5081FG
Two-Wire In-Situ Oxygen Analyzer (550 °C to 1600 °C)
Reference Manual
June 2019
Rosemount 5081FG
TOC-1
00809-0100-4882, Rev AB
SECTION i
Introduction
SECTION 1
Description and
Specifications
SECTION 2
Installation
Table of Contents
Preface .................................................................................................... iv
Definitions ................................................................................................ iv
Symbols ................................................................................................... iv
Technical Support Hotline: ................................................................. iv
Component Checklist ........................................................................... 1-1
System Overview .................................................................................. 1-3
Scope .............................................................................................. 1-3
System Description ......................................................................... 1-3
System Configuration ...................................................................... 1-4
System Features ............................................................................. 1-4
Handling the Analyzer ..................................................................... 1-6
System Considerations ................................................................... 1-6
Specifications ....................................................................................... 1-7
Pre-Installation ...................................................................................... 2-2
Inspect ............................................................................................. 2-2
Packing List ..................................................................................... 2-2
Mechanical Installation ......................................................................... 2-2
Locating Oxygen Probe ................................................................... 2-2
Installing Oxygen Probe .................................................................. 2-4
Locating Rosemount 5081 Transmitter ........................................... 2-7
Installing Rosemount 5081 Transmitter .......................................... 2-8
Electrical Installation ........................................................................... 2-11
General .......................................................................................... 2-11
Oxygen Probe Signal Connections ............................................... 2-12
Rosemount 5081 Transmitter 4-20 mA and Signal Connections . 2-13
Pneumatic Installation ........................................................................ 2-14
General .......................................................................................... 2-14
Reference Air Package ................................................................. 2-14
Instrument Air (Reference Air) ....................................................... 2-14
Calibration Gas .............................................................................. 2-15
SECTION 3
Startup and
Operation
General ................................................................................................. 3-1
Power Up .............................................................................................. 3-1
Establishing Proper Calibration Gas Flow Rate ................................... 3-3
Operation .............................................................................................. 3-4
Overview ......................................................................................... 3-4
Display ............................................................................................. 3-4
Menu Tree ....................................................................................... 3-4
Navigation ....................................................................................... 3-6
Program Menu ...................................................................................... 3-7
Operator Adjustable Parameters ..................................................... 3-7
Code ................................................................................................ 3-8
Display Code ................................................................................... 3-9
Fault Val .......................................................................................... 3-9
Upper Range Val ........................................................................... 3-10
Reference Manual
4882, Rev AB
June 2019
Rosemount 5081FG
TOC-2
00809-0100-
Cell T Hi ......................................................................................... 3-10
Reset Max Cell T ........................................................................... 3-11
Set O2 Filter Time .......................................................................... 3-11
Trim 4mA ....................................................................................... 3-12
Trim 20mA ..................................................................................... 3-13
Set Hi Bottle O
Set Lo Bottle O
Set O
Set Code ........................................................................................ 3-15
Diagnostics Menu ............................................................................... 3-16
Show Fault ..................................................................................... 3-16
T/C mV ........................................................................................... 3-17
O
Cell Impedance .............................................................................. 3-18
Current Slope ................................................................................. 3-18
Current Constant ........................................................................... 3-19
Previous Slope ............................................................................... 3-19
Previous Constant ......................................................................... 3-20
Max Cell T ...................................................................................... 3-20
SW Ver (SOFt) ............................................................................... 3-21
Unit Ser # (SEr) .............................................................................. 3-21
SW Build Number (bLdn) ............................................................... 3-21
SW Build Date (bd) ........................................................................ 3-21
Cal Check Menu .................................................................................. 3-21
In Manual ....................................................................................... 3-21
Accept High O
Accept Low O
Slope .............................................................................................. 3-23
Constant ......................................................................................... 3-23
Tracking .............................................................................. 3-15
2
CELL mV .................................................................................. 3-17
2
.............................................................................. 3-14
2
............................................................................. 3-14
2
.............................................................................. 3-22
2
............................................................................... 3-22
2
SECTION 4 HART/AMS
SECTION 5
Troubleshooting
SECTION 6
Maintenance and Service
Overview ............................................................................................... 4-1
Field Communicator Signal Line Connections ...................................... 4-2
Field Communicator PC Connections ................................................... 4-4
Off-Line and On-Line Operations .......................................................... 4-4
HART/AMS Menu Tree ......................................................................... 4-4
Field Communicator Start Cal Check Method ...................................... 4-8
General ................................................................................................. 5-1
Probe Life .............................................................................................. 5-1
Fault Indications .................................................................................... 5-3
Identifying And Correcting Fault Indications ........................................
Calibration Passes, But Still Reads Incorrectly ..................................... 5-8
Probe Passes
Calibration, O2 Still
Reads High ...................................................................................... 5-8
Overview ............................................................................................... 6-1
Electronics
Replacement ......................................................................................... 6-1
Display Board Replacement ............................................................ 6-1
Spare Board Stack Replacement .................................................... 6-3
Oxygen Probe Replacement ................................................................. 6-3
5-4
Reference Manual
June 2019
Rosemount 5081FG
TOC-3
00809-0100-4882, Rev AB
SECTION 7
Replacement Parts
APPENDIX A
Safety Data
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Safety Data Sheet for Ceramic Fiber Products . . . . . . . . . . . . . . . . A-3
APPENDIX B
Return of Material
Returning Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Reference Manual
4882, Rev AB
June 2019
Rosemount 5081FG
TOC-4
00809-0100-
Reference Manual
June 2019
Rosemount 5081FG
00809-0100-4882, Rev AB
ESSENTIAL INSTRUCTIONS
Oxygen Analyzers
READ THIS PAGE BEFORE PROCEEDING!
Emerson designs, manufactures and tests its products to meet many national
and international standards. Because these inst ruments 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
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 invalidat i on.
•
Read all instructions prior to installing, operatin g, and servicing the
product.
•
If you do not understand any of the instructions, contact your
Emerson 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 en sure 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. 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 protectiv e cov ers
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 subje ct 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 Service Group or National Response Center at
1-800-433-6076 or 1-888-433-6829.
Reference Manual
4882, Rev AB
June 2019
Rosemount 5081FG
00809-0100-
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’ equipment. This could be intentional or
unintentional and needs to be protected against.
Physical security is an important part of any security program and fundamental to protecting your system. Restrict physical access by unauthorized
personnel to protect end users’ assets. This is true for all systems used within the facility.
Reference Manual
June 2019
Rosemount 5081FG
00809-0100-4882, Rev AB
Section 1 Introduction
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page i-iv
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page i-iv
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page i-iv
PREFACE The purpose of this manual is to provide information concerning the
components, functions, installation and maintenance of the Rosemount
5081FG Two-Wire In-Situ Oxygen Analyzer (550° to 1600°C).
Some sections may describe equipment not used in your configuration. The
user should become thoroughly familiar with the operation of this module
before operating it. Read this instruction manual c ompletely.
DEFINITIONS The following definitions apply to WARNINGS, CAUTIONS, and NOTES
found throughout this publication.
SYMBOLS
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.
NOTE
Highlights an essential operating procedure, co ndition, or statement.
:
EARTH (GROUND) TERMINAL
:
PROTECTIVE CONDUCT OR TERMINAL
:
RISK OF ELECTRICAL SHOCK
:
WARNING: REFER TO INSTRUCTION MANUAL
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, an d is not related to the
illustration in any technical manner.
Reference Manual
4882, Rev AB
June 2019
Rosemount 5081FG
00809-0100-
Technical Support Hotline:
For assistance with technical problems, please
call the North American Response Center. The
Response Center is staffed 24 hours a day, 7
days a week.
Phone: 1-800-654-RSMT (1-800-654-7768)
Emerson may also be reached via the Internet
through email and the World Wide Web:
Email: GAS.CSC@emerson.com
Reference Manual
June 2019
Rosemount 5081FG
00809-0100-4882, Rev AB
Section 1 Description and Specifications
Component Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-7
COMPONENT
CHECKLIST
A typical Rosemount Two-Wire In-Situ Oxygen Analyzer should contain the
items shown in Figure 1-1. Record the part number, s erial number, and order
number for each component of your system in the tabl e l ocated on the first
page of this manual.
Also, use the product matrix in Table 1-1 at the end of thi s section to compare
your order number against your unit. The first part of the matrix defines the
model. The last part defines the various options and features of the
Rosemount 5081FG Analyzer. Ensure the feature s and options specified by
your order number are on or included with the unit.
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
1-2
Figure 1-1. Typical System Package
00809-0100-
1.
Instruction Manual
2.
Rosemount 5081 Transmitter
3.
Oxygen Probe
4.
Adapter Plate with Mounting Hardware and Gasket (Optional)
5.
Infrared Remote Control (IRC)
6.
Reference Air Set (Optional)
7.
Field Communicator Package (Optional)
8.
Pipe Mounting Kit (Optional)
Reference Manual
00809
May 2019
Rosemount 5081FG
1-3
-0100-4882, Rev AB
SYSTEM OVERVIEW
Scope This Instruction Bulletin is designed to supply details needed to install, start
up, operate, and maintain the Rosemount Two-Wire In-Situ Oxygen Analyzer.
The analyzer consists of an oxygen probe and Rosem ount 5081 transmitter.
The signal conditioning electronics of the Rosemount 5081 transmitter
outputs a 4-20 mA signal representing an O
control (IRC) allows access to setup, calibration, and diagnostics. This same
information, plus additional details, can be accessed with the HART field
communicator or Asset Management Solutions (AM S) software.
value. An infrared remote
2
System Description The Rosemount Two-Wire In-Situ Oxygen Analyzer is designed to measure
the net concentration of oxygen in an industrial process; i.e., the oxygen
remaining after all fuels have been oxidized. The oxygen probe is
permanently positioned within an exhaust duct or stack and performs its task
without the use of a sampling system. Rosemount 5081 transmitter is
mounted remotely and conditions the oxygen pro be outputs.
The equipment measures oxygen percentage by reading the voltage
developed across a heated electrochemical cel l, 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 tem perature, the millivolt
output voltage of the cell is given by the following Nernst equation:
EMF = KT log10(P1/P2) + C
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.
NOTE
The probe uses a Type B thermocouple to measure th e cell temperature.
When the cell is at operating temperature and there are unequal oxygen
concentrations across the cell, oxygen ions will t ravel from the high oxygen
partial pressure side to the low oxygen partial pres sure side of the cell. The
resulting logarithmic output voltage is approx im ately 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
Rosemount Two-Wire In-Situ Oxygen Analyzer to provide exceptional
sensitivity at low oxygen concentrations.
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
1-4
00809-0100-
The oxygen analyzer measures net oxygen concentration in the presence of
all the products of combustion, including water vap or. Therefore, it may be
considered an analysis on a “wet” basis. In compa rison 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.
System Configuration The equipment discussed in this manual consists of two major components:
the oxygen probe and the Rosemount 5081 transmit ter.
Oxygen probes are available in three length options, providing In-Situ pene-
tration appropriate to the size of the stack or duct. The options on length are
20 in. (508 mm), 26 in. (660 mm), or 38 in. (965 mm).
Rosemount 5081 transmitter is a two-wire transmitter providing an isolated
output, 4-20 mA, that is proportional to the measured oxygen concentration. A
customer-supplied 24 VDC power source is required to simultaneously provide power to the electronics and a 4-20 mA signal loop. The transmitt er
accepts millivolt signals generated by the probe and produces the outputs to
be used by other remotely connected devices. The ou t put is an isolated 4-20
mA linearized current.
System Features 1. The cell output voltage and sensitivity increase as the oxygen
concentration decreases.
2.
High process temperatures eliminate the need for external cell heating
and increase cell accuracy.
3.
HART communication is standard. To use the HART capability, you
must have either:
(a)
Field Communicator
(b)
Asset Management Solutions (AMS) software f or the PC
4.
Easy probe replacement due to the light-weight, com pact probe design.
5.
Remote location of the Rosemount 5081 transmitter removes the
electronics from high temperature or corrosive environments.
6.
Power is supplied to the electronics through the 4-20 mA line for intrinsic
safety (IS) purposes.
7.
Infrared remote control (IRC) allows interfacing without exposing the
electronics.
Reference Manual
00809
May 2019
Rosemount 5081FG
1-5
-0100-4882, Rev AB
8.
An operator can operate and diagnostically troubleshoot the Two-Wire
In-Situ Oxygen Analyzer in one of two ways:
a.
Infrared Remote Control. The IRC allows access to faul t indication
menus on the Rosemount 5081 transmitter LCD display. Calibration
can be performed from the IRC keypad.
b.
Optional HART Interface (Figure 1-2). The Two-Wire In-Situ Oxygen
Analyzer's 4-20 mA output line transmits an analog signal
proportional to the oxygen level. The HART output is superimposed
on the 4-20 mA output line. This information can be accessed
through the following:
•
Field Communicator - The field communicator requires Device
Description (DD) software specific to the Two-Wire In-Situ
Oxygen Analyzer. The DD software will be supplied with many
field communicators but can also be programmed int o existing
units at most Fisher-Rosemount service offices. See Section 4:
HART/AMS, for additional HART information.
•
Personal Computer (PC) - The use of a personal computer
requires AMS software available from Fisher-Rosemount.
9.
Selected Distributed Control Systems - The use of distributed co nt rol
systems requires input/output (I/O) hardwar e and A MS Security codes
are provided to (by infrared remote control) prevent unintended changes
to analyzers adjacent to the one being accessed.
10.
A calibration check procedure is provided to determine if the Rosemount
Two-Wire In-Situ Oxygen Analyzer is correctly m easuring the net
oxygen concentration in the industrial process.
Figure 1-2. Two-Wire In-Situ Oxygen Analyzer HART Connections and AMS Application
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
1-6
00809-0100-
Handling the Analyzer The probe was specially packaged to prevent breakag e due to handling. Do
not remove the padding material from the probe unt il i m m ediately before
installation.
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 oxygen probe is designed for industrial applications. Treat each component of the
system with care to avoid physical damage. Some probe components are made from
ceramics, which are susceptible to shock when mishandled.
System Considerations Prior to installing your Rosemount Two-Wire In-Situ Oxygen Analyzer, make
sure you have all the components necessary to make the system installation.
Ensure all the components are properly integrated to m ake t he system
functional.
Figure 1-3. Typical System
Installation
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, environment al considerations, convenience,
and serviceability. Figure 1-1 shows a typical sy st em package. A typical
system installation is shown in Figure 1-3.
Reference Manual
00809
May 2019
Rosemount 5081FG
1-7
-0100-4882, Rev AB
SPECIFICATIONS
A source of instrument air is optional at the oxygen probe for reference air
use. Since the unit is equipped with an in place calibration feature, provisions
can be made to permanently connect calibration gas b ottles to the oxygen
probe.
If the calibration gas bottles will be permanently connected, a check valve is
required next to the calibration fittings on the int egral electronics.
This check valve is to prevent breathing of the calibration gas line and
subsequent flue gas condensation and corrosi on. The check valve is in
addition to the stop valve in the calibration gas kit.
NOTE:
The electronics is rated Type 4X (IP65) and is capable of operat ion at
temperatures up to 65°C (149°F).
Retain the packaging in which the Rosemount Tw o-Wire In-Situ Oxygen
Analyzer arrived from the factory in case any components are to be shipped
to another site. This packaging has been designe d to protect the product.
Transmitter
Net O2 Range 0 to 25% O
System Accuracy ±1.5% of reading or 0.05% O2, whichever is greater
System Response in Flue Gas Initial – less than 3 seconds,
Probe Lengths 20 in. (508 mm)
Process Temperature Limits: 550° to 1400°C (1022° to 2552°F)
Ambient Temperature Limits: -40° to 149°C (-40° to 300°F)
Mounting and Mounting Position Vertical or horizontal
Materials of Construction
(Process Wetted Parts):
Inner Probe
Outer Protection Tube
Probe Junction Box
T90 – less than 8 seconds
26 in. (660 mm)
38 in. (965 mm)
Operation to 1600°C (2912°F) with reduced cell life
Zirconia
Alumina [1600°C (2912°F) limit]
Inconel 600 [1000°C (1832°F) limit]
Cast aluminum
2
Speed of Installation/Withdrawal 1 in. (25,4 mm) per minute
Hazardous Area Certification See Section 8.
Reference Air Requirement 100 m per minute (2,119 scfh) of clean, dry
Calibration Check Gas Fittings 1/4 in. tube fittings
Cabling Two twisted pairs, shielded
Continued on Next Page
instrument air; 1/4 in. tube fittings
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
1-8
Shipping Weight
10 lbs (4,5 kg)
Infrared Remote Control
Power Requirements
Three AAA atteries
Figure 1-4. Power Supply and
Load Requirements
00809-0100-
Electronics
Electronics Enclosure TYPE 4X (IP65), weatherproof, and
corrosion-resistant
Materials of Construction Low copper aluminum
Ambient Temperature Limits -20° to 65°C (-4° to 149°F)
Relative Humidity 95% with covers sealed
Power Supply and Load Requirements See Figure 1-4
Inputs (from O
Output One 4-20 mA signal with superimposed digital HART
Hazardous Area Certification See Section 8.
Power Transient Protection IEC 801-4
Hazardous Area Certification ATEX EEx ia IIC Class 1, Div 1, Group A, B, C, D
Probe) Two wires - O2 signal
2
Two wires - type B thermocouple
signal
Reference Manual
00809
May 2019
Rosemount 5081FG
1-9
-0100-4882, Rev AB
Table 1-1. Product Matrix
5081FG High Temperature Oxygen Flue Gas Analyzer
Code Sensing Probe Type
1
20 in. (508 mm) probe, 1/4 in. tube fittings
2
26 in. (660 mm) probe, 1/4 in. tube fittings
3
38 in. (965 mm) probe, 1/4 in. tube fittings
Code Probe Outer Tube Material - Maximum Operating Temperature
1
Alumina - 2912°F (1600°C) maximum - 1.25 NPT mounting
2
Inconel Alloy - 1832°F (1000°C) maximum - 1.25 NPT mounting
Code Mounting Adapter- Stack Side
0
No adapter plate required uses 1.25 NPT
("0" must also be chosen under "Mounting Adapter" below)
1
New flanged installation - Square weld plate with studs (matches "Mounting Adapter" below)
2
Model 450 mounting ("4" must also be chosen under "Mounting Adapter" below)
3
Competitor's Mount ("5" must also be chosen under "Mounting Adapter" below)
Code Mounting Adapter - Probe Side
0
No adapter plate
1
ANSI 2 in. 150 lb flange to 1.25 NPT adapter
(6 in. dia. flange, 4.75 in. BC with 4 x 0.75 in. dia. holes)
2
DIN to 1.25 NPT adapter (184 mm flange, 145 mm BC with 4 x 18 mm dia. holes)
3
JIS to 1.25 NPT adapter (155 mm flange, 130 mm BC with 4 x 13 mm dia. holes)
4
Model 450 to 1.25 NPT adapter
5
Competitor's mounting flange
Code Electronics & Housing TYPE 4X, IP65
H1 5081-G HART Electronics – ATEX/IECEx
H2 5081-G HART Electronics - CSA
H3 5081-G HART Electronics - FM
Code Housing Mounting
1
Surface or wall mounting
2
1/2 to 2 in. pipe mounting
Code Communications
1
No remote control
2
Infrared Remote Control (IRC)
(LCD display through cover window
Code Calibration Accessories
1
No hardware
2
Calibration and reference air flowmeters and
reference air pressure regulator
Code Armored Cable Length
00 No cable
11 20 ft (6 m)
12 40 ft (12 m)
13 60 ft (18 m)
14 80 ft (24 m)
15 100 ft (30 m)
16 150 ft (45 m)
17 200 ft (61 m)
18 300 ft (91 m)
19 400 ft (122 m)
20 500 ft (152 m)
5081FG 2 1 0 0 1 1 1 2 11 Example
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
1-10
00809-0100-
Reference Manual
00809
May 2019
Rosemount 5081FG
-0100-4882, Rev AB
Section 2 Installation
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2
Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-11
Pneumatic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-14
Before installing this equipment, read the “Safety instructions for the wiring and installation
of this apparatus” in Appendix A. Failure to follow safety instructions could result in serious
injury or death.
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
2-2
00809-0100-
PRE-INSTALLATION
Inspect Carefully inspect the shipping container for any evi dence of damage. If the
container is damaged, notify the carrier immediately.
Packing List Confirm that all items shown on the packing list are present. Notify
Rosemount immediately if items are missing.
Before installing this equipment, read the “Safety instructions for the wiring and installation
of this apparatus” in Appendix A. Failure to follow safety instructions could result in serious
injury or death.
MECHANICAL INSTALLATION
Avoid installation locations near steam soot blowers.
Locating Oxygen Probe 1. The location of the oxygen probe in the stack or flue i s im portant for
maximum accuracy in the oxygen analyzing process. The pro be must
be positioned so the gas it measures is representative of the process.
Longer ducts may require several analyzers since the O
to stratification. A point too near the wall of the duct, or the in-side 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 a range of 55 0° to 1400°C (1022°
to 2552°F). Figure 2-1 provides mechanical installation references.
2.
Check the flue or stack for holes and air leakage. The presence of this
condition will substantially affect the accuracy of the oxygen reading.
Therefore, either make the necessary repairs or install the probe
upstream of any leakage.
3.
Ensure the area is clear of internal and external obstructions that will
interfere with installation and maintenance access to the probe. Allow
adequate clearance for probe removal (Figure 2-1).
can vary due
2
Reference Manual
00809
May 2019
Rosemount 5081FG
2-3
-0100-4882, Rev AB
Figure 2-1. Probe Installation Details
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
2-4
Installing Oxygen Probe
00809-0100-
The probe was specially packaged to prevent breakage due to handling. Do not remove the
padding material from the probe until immediately before installation.
1.
Ensure all components are available to install the probe.
NOTE
Leave the probe inner protective cover in place until i nstal l ation. This is
required to protect the ceramic cell during mov em ent.
2.
If using an optional adapter plate (Figure 2-2) or an optional mounting
flange (Figure 2-3), weld or bolt the component onto the duct. The
through hole in the stack or duct wall and refractory material must be
2 in. (50,8 mm) diameter, minimum.
3.
If the optional adapter plates are not used, a 2 in. NPT, schedule 40,
pipe nipple (Figure 2-4) should be welded to the stack or duct wall.
When a 2 in. NPT to 1.25 NPT adapter is threaded to the welded pipe
nipple, the adapter provides the pipe threads needed f or the probe's
process fitting.
4.
Where high particulate or slag is in the flue gas stream, it may be
desirable to inset the probe in the refractory as shown in Figure 2-5. Use
pipe couplings and nipples to adjust the probe insertion depth.
5.
Use high temperature material (alumina wool) to seal around the probe
during insertion. This prevents hot gases from escaping or cold air from
entering the stack or duct.
6.
Initially insert the probe to a depth of 3 in. (76,2 mm) or 1/2 the depth of
the stack or duct refractory, whichever is greater.
After initial insertion, do not insert the probe at a rate exceeding 1 in. per minute (25.4 mm
per minute) or damage to the probe may result due to thermal shock.
7.
After initial insertion, insert the probe at a rate of 1 i n. (25,4 mm) per
minute until the probe is fully inserted.
8.
Install anti-seize compound on the pipe threads and scre w t he probe
into the process flange or adapter.
9.
If insulation was removed to access the duct work for probe mounting,
make sure the insulation is replaced. See Figure 2-4.
If the ducts will be washed down during outage, MAKE SURE to power down the probes
and remove them from the wash area.
Reference Manual
00809
May 2019
Rosemount 5081FG
2-5
-0100-4882, Rev AB
Figure 2-2. Optional Adapter Plate
Figure 2-3. Optional Probe Mounting Flange
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
2-6
Figure 2-4. Horizontal Probe Installation
00809-0100-
Reference Manual
00809
May 2019
Rosemount 5081FG
2-7
-0100-4882, Rev AB
Figure 2-5. Adjusting Probe Insertion Depth
Locating Rosemount 5081 Transmitter
1.
Ensure the Rosemount 5081 transmitter is easily acc essible for
maintenance and service and for using the infrared remote control (if
applicable).
Do not allow the temperature of the Rosemount 5081 transmitter exceed 65°C (149°F) or
damage to the unit may result.
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
2-8
2.
Installing Rosemount 5081 Transmitter
3.
1.
2.
Figure 2-6. Flat Surface Mounting Dimensions
00809-0100-
The ambient temperature of the transmitter housing must not exceed
65°C (149°F). Locate the electronics in an area where temperature
extremes, vibration, and electromagnetic and radi o frequency
interference are minimal.
Locate the Rosemount 5081 transmitter within 150 ft (45, 7 m) of the
oxygen probe due to wiring and signal considerations.
Ensure all components are available to install the Rosemount 5081
transmitter.
Choose a method or location to mount the transmitter.
a.
Flat Surface Mounting. The transmitter may be mounted on a flat
surface using the threaded mounting holes located on the bottom of
the transmitter housing. Refer to Figure 2-6 for inst al lation
references.
b.
Pipe Mounting. An optional pipe mounting bracket i s available for
this type of installation. Refer to Figure 2-7 for installation references.
Reference Manual
00809
May 2019
Rosemount 5081FG
2-9
-0100-4882, Rev AB
Figure 2-7. Pipe Mounting Dimensions
Reference Manual
4882, Rev AB
May 2019
Rosemount 5081FG
2-10
Figure 2-8. Display Positioning
Assembly
00809-0100-
3.
For correct viewing orientation, the display may be changed 90 degrees,
using the following procedure:
a.
Refer to Figure 2-8. Loosen the cover lock screw until the cover lock
is disengaged from the knurled surface on the thread ed circuit end
cap.
b.
Remove the circuit end cap.
c.
Remove the three screws retaining the display bo ard in place.
d.
Lift and rotate the display board 90 degrees either way.
e.
Reposition the display board on the standoffs. I nst al l and tighten all
three screws.
f.
Install the circuit end cap and tighten the cover lo ck screw to secure
the cover lock in place.
Loading...