Emerson Rosemount Oxymitter 4000 User manual

Reference Manual
00809-0100-4340, Rev AB
October 2019
Rosemount™ Oxymitter 4000
Hazardous Area Oxygen Transmitter

Essential instructions
Read this page before proceeding!
Emerson 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 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 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 equipment as specified in the installation instructions of the appropriate Reference 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 Rosemount.
Unauthorized parts and procedures can affect the product's performance, place the safe operation of your process at risk, and
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 people, to prevent electrical shock and personal injury.
Note
The information contained in this document is subject to change without notice.
CAUTION
If a Model 275/375 HART® Communicator is used with this product, 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
1-800-422-6076 or 1-888-433-6829.
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.
Preface
The purpose of this manual is to provide information concerning the components, functions, installation, and maintenance of the
Rosemount™ Oxymitter 4000.
Some sections may describe equipment not used in your configuration. Become thoroughly familiar with the operation of this
module before opening it. Read this Reference Manual completely.
Warranty
Rosemount™ warrants that the equipment manufactured and sold by it will, upon shipment, be free of defects in workmanship or
material. Should any failure to conform to this warranty become apparent during a period of one year after the date of shipment,
Rosemount shall, upon prompt written notice from the purchaser, correct such nonconformity by repair or replacement, F.O.B.
factory of the defective part or parts. Correction in the manner provided above shall constitute a fulfillment of all liabilities of
Rosemount with respect to the quality of the equipment.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES OF QUALITY WHETHER WRITTEN, ORAL, OR
IMPLIED (INCLUDING ANY WARRANTY OF MERCHANTABILITY OF FITNESS FOR PURPOSE).
2

The remedy(ies) provided above shall be purchaser’s sole remedy(ies) for any failure of Rosemount to comply with the warranty
provisions, whether claims by the purchaser are based in contract or in tort (including negligence).
Rosemount does not warrant equipment against normal deterioration due to environment. Factors, such as corrosive gases and
solid particulates, can be detrimental and can create the need for repair or replacement as part of normal wear and tear during the
warranty period.
Equipment supplied by Rosemount, Inc. but not manufactured by it will be subject to the same warranty as is extended to
Rosemount by the original manufacturer.
At the time of installation it is important that the required services are supplied to the system and that the electronic controller is
set up at least to the point where it is controlling the sensor heater. This will ensure, that should there be a delay between
installation and full commissioning that the sensor being supplied with ac power and reference air will not be subjected to
component deterioration.
Definitions
The following definitions apply to Warnings, Cautions, and Notes found throughout this publication.
WARNING
Highlights an operation or maintenance procedure, practice, condition, statement, etc., which if not strictly observed, could result
in injury, death, or long-term health hazards of personnel.
CAUTION
Highlights an operation or maintenance procedure, practice, condition, statement, etc., which 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.
Symbols
Earth (ground) terminal
Protective conductor terminal
Risk of electrical shock
Refer to reference manual.
3

4

Contents
Chapter 1 Description and specifications........................................................................................9
1.1 Components checklist...................................................................................................................... 9
1.2 Overview........................................................................................................................................ 17
1.3 Measurement.................................................................................................................................17
1.4 Configuration................................................................................................................................. 18
1.5 Features......................................................................................................................................... 19
1.6 System considerations....................................................................................................................22
1.7 Optional Rosemount IMPS 4000.....................................................................................................30
1.8 Optional Rosemount SPS 4001B.....................................................................................................30
1.9 Rosemount 751 remote powered loop LCD display........................................................................ 30
1.10 Probe options...............................................................................................................................31
1.11 Specifications............................................................................................................................... 33
Chapter 2 Install...........................................................................................................................37
2.1 Mechanical installation...................................................................................................................37
2.2 Electrical installation with integral electronics................................................................................ 51
2.3 Electrical installation with remote electronics.................................................................................58
2.4 Pneumatic installation....................................................................................................................65
2.5 Rosemount™ IMPS 4000 connections............................................................................................. 68
2.6 Rosemount SPS 4001B connections............................................................................................... 68
Chapter 3 Configure transmitter with membrane keypad............................................................ 69
3.1 Verify installation............................................................................................................................69
3.2 Mechanical installation...................................................................................................................69
3.3 Wire terminal block........................................................................................................................ 69
3.4 Configuration................................................................................................................................. 70
3.5 Logic I/O.........................................................................................................................................73
3.6 Recommended configuration.........................................................................................................74
Chapter 4 Configure transmitter with LOI.....................................................................................77
4.1 Verify installation............................................................................................................................77
4.2 Mechanical installation...................................................................................................................77
4.3 Wire terminal block........................................................................................................................ 77
4.4 Configuration................................................................................................................................. 79
4.5 Logic I/O.........................................................................................................................................82
4.6 Recommended configuration.........................................................................................................82
Chapter 5 Start up and operate transmitter with membrane keypad............................................ 85
5.1 Power up........................................................................................................................................ 85
5.2 Operate..........................................................................................................................................88
Reference Manual Contents
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 v

Chapter 6 Start up and operate transmitter with LOI.................................................................... 91
6.1 Power up........................................................................................................................................ 91
6.2 Navigating the local operator interface...........................................................................................95
6.3 LOI key designations.......................................................................................................................96
6.4 LOI menu tree.................................................................................................................................96
6.5 Setup at the LOI..............................................................................................................................98
6.6 SYSTEM/Parameters....................................................................................................................... 99
6.7 SYSTEM/Status............................................................................................................................. 100
6.8 LOI installation............................................................................................................................. 101
6.9 Test points................................................................................................................................... 101
6.10 Remote powered loop LCD display (optional).............................................................................102
Chapter 7 HART®/AMS............................................................................................................... 103
7.1 Overview...................................................................................................................................... 103
7.2 HART® Communicator signal line connections............................................................................. 103
7.3 Connect HART® Communicator to a PC........................................................................................ 107
7.4 Off-line and on-line operations..................................................................................................... 107
7.5 Logic I/O configurations............................................................................................................... 107
7.6 HART® menu tree......................................................................................................................... 109
7.7 Calibrate O2 with HART®...............................................................................................................111
7.8 Automatically calibrate with HART®............................................................................................. 113
7.9 D/A trim....................................................................................................................................... 113
Chapter 8 Troubleshoot............................................................................................................. 115
8.1 Overview...................................................................................................................................... 115
8.2 Factors to consider when troubleshooting....................................................................................116
8.3 Alarm indications......................................................................................................................... 117
8.4 Alarm contacts............................................................................................................................. 118
8.5 Identify and correct alarm indications...........................................................................................119
8.6 Heater not open, but unable to reach 1357 °F (736 °C) setpoint................................................... 145
8.7 Calibration passes, but still reads incorrectly.................................................................................146
Chapter 9 Maintenance and service............................................................................................149
9.1 Overview...................................................................................................................................... 149
9.2 Calibrate.......................................................................................................................................149
9.3 Repair...........................................................................................................................................157
Chapter 10 Replacement parts..................................................................................................... 173
10.1 Probe replacement parts............................................................................................................ 173
10.2 Electronics replacement parts.................................................................................................... 175
Appendix A Upgrade Rosemount™ Oxymitter DR to full Oxymitter............................................... 177
Appendix B Optional accessories.................................................................................................. 181
B.1 Rosemount™ By-Pass Package...................................................................................................... 181
B.2 Rosemount™ IMPS 4000 Intelligent Multiprobe Test Gas Sequencer............................................. 181
Contents Reference Manual
October 2019 00809-0100-4340
vi Emerson.com/Rosemount

B.3 Rosemount™ SPS 4001B Single Probe Autocalibration Sequencer.................................................182
Appendix C Safety instructions..................................................................................................... 185
Appendix D Safety data sheet for ceramic fiber products...............................................................187
D.1 Identification............................................................................................................................... 187
D.2 Physical data................................................................................................................................ 187
Appendix E Rosemount™ Oxymitter™ product certifications........................................................ 189
E.1 European Directive information....................................................................................................189
E.2 Ordinary location certification...................................................................................................... 189
E.3 Installing equipment in North America......................................................................................... 189
E.4 Rosemount™ OXT4A Oxymitter for general purpose locations and OXT4C hazardous locations
certification................................................................................................................................... 189
E.5 Rosemount™ Xi, X-Stream Xi Remote Interface, for general locations certification........................191
Appendix F Declaration of Conformity..........................................................................................193
Appendix G China RoHS table........................................................................................................197
Reference Manual Contents
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 vii

Contents Reference Manual
October 2019 00809-0100-4340
viii Emerson.com/Rosemount

1 Description and specifications
1.1 Components checklist
A typical Rosemount™ Oxymitter 4000 should contain the items shown in Figure 1-1.
Record the part number, serial number, and order number for each component of your
system.
WARNING
The Rosemount Oxymitter 4000 is offered in both hazardous area and general
purpose configurations.
The hazardous area version has special markings on the approval label. The general
purpose version does not. If you received the general purpose version, ensure you do not
install it in a potentially explosive atmosphere.
Also use Table 1-1 through Table 1-4 to compare your order number against your unit. The
title of the table defines the model. The rest of the table defines the various options and
features of the Rosemount Oxymitter 4000. Ensure the features and options specified by
your order number are on or included with the unit.
Reference Manual Description and specifications
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 9

Figure 1-1: Typical System Package
A. Quick Start Guide
B. Rosemount IMPS 4000 Intelligent Multiprobe Test Gas Sequencer (optional)
C. Rosemount Oxymitter 4000 with integral electronics
D. Rosemount SPS 4001B Single Probe Autocalibration Sequencer (optional) (safe area
only)
E. HART® Communicator package (optional)
F. Mounting plate with mounting hardware and gasket
G. Rosemount Oxymitter 4000 with remote electronics (optional)
H. Reference air set (used if Rosemount SPS 4001B without reference air option or
Rosemount IMPS 4000 is not supplied)
Description and specifications Reference Manual
October 2019 00809-0100-4340
10 Emerson.com/Rosemount

Table 1-1: Rosemount Oxymitter 4000 Ordering Information
Code Sensing probe type with flame arrestor
1 Ceramic diffusion element probe (ANSI 3-in. 150 lb.)
2 Snubber diffusion element (ANSI 3-in. 150 lb.)
3 Ceramic diffusion element probe (DIN 2527): ¼-in. (6.35 mm)
tube fittings
4 Snubber diffusion element (DIN 2527): ¼-in. (6.35 mm) tube
fittings
7 Ceramic diffusion element (ANSI 3-in. 300 lb.)
8 Ceramic diffusion element (ANSI 4-in. 300 lb.)
Code Probe assembly
0 18 in. (457 mm) probe
3 3 ft. (0.91 m) probe
5 6 ft. (1.83 m) probe
Code Mounting adapter - 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 mounting plate (with Model 218 shield removed)
3 Adapter plate required; must reference adapter plate part
number.
Code Mounting adapter - probe side
0 No adapter plate
1 Probe only (ANSI)
4 Probe only (DIN)
Code Electronic housing & filtered customer termination - NEMA®
4X, IP66
12 HART integral electronics, transient protected filtered
termination, ATEX certification
14 HART remote electronics (requires cable), transient protected
termination, ATEX certification
22 HART integral electronics, transient protected termination, CSA
certification
24 HART remote electronics (requires cable), transient protected
termination, CSA certification
Code Communications
1 Membrane keypad - HART capable
2 Membrane keypad - HART capable glass window
3 Gas fluorescent LOI HART capable, glass window, English only
Reference Manual Description and specifications
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 11

Table 1-1: Rosemount Oxymitter 4000 Ordering Information (continued)
Code Language
1 English
2 German(1)
3 French(1)
4 Spanish(1)
5 Italian(1)
Code Termination filtering
00 No option - specified as part of electronic housing
Code Calibration accessories
00 No hardware
01 Cal/Ref flow meters and ref pressure regulator
Code Hazardous area approval
00 Specified as part of electronics
Code Electronics to probe cable
00 No cable
10 20 ft. (6 m) cable
11 40 ft. (12 m) cable
12 60 ft. (18 m) cable
13 80 ft. (24 m) cable
14 100 ft. (30 m) cable
15 150 ft. (45 m) cable
16 200 ft. (61 m) cable
(1) Membrane keypad only.
Note
1. Recommended uses: High velocity particulates in flue stream, installation within
11.5 ft. (3.5 m) of soot blowers or heavy salt cake buildup. Applications: pulverized
coal, recovery boilers, or lime kiln.
2. Where possible, specify ANSI or DIN designation; otherwise, provide details of
existing mounting plate as follows:
Plate with studs Bolt circle diameter, number and arrangement of studs,
stud thread, and stud height above mounting plate
Plate without studs Bolt circle diameter, number, and arrangement of holes,
threads, and depth of stud mounting plate with accessories
Description and specifications Reference Manual
October 2019 00809-0100-4340
12 Emerson.com/Rosemount

3. You can use the membrane keypad to start up, calibrate, and operate the
transmitter. Remote access and additional functionality available via HART
Communications.
Table 1-2: Rosemount OXT4CDR Oxymitter Probes
Code Sensing probe type with flame arrestor
1 Ceramic diffusion element probe (ANSI), 115 V heater
2 Snubber diffusion element (ANSI), 115 V heater
3 Ceramic diffusion element probe (DIN), 115 V heater
4 Snubber diffusion element probe (DIN), 115 V heater
7 Ceramic diffusion element probe (ANSI) 3-in. 300 lb. bolt circle,
115 V heater
8 Snubber diffusion element probe (ANSI) 3-in. 300 lb. bolt circle,
115 V heater
A Ceramic diffusion element probe (ANSI), 44 V heater
B Snubber diffusion element (ANSI), 44 V heater
C Ceramic diffusion element probe (DIN), 44 V heater
D Snubber diffusion element (DIN), 44 V heater
Code Probe assembly
0 18 in. (457 mm) probe
3 3 ft. (0.91 m) probe
5 6 ft. (1.83 m) probe
Code Mounting adapter - stack side
0 No adapter plate
1 Probe only (ANSI)
4 Probe only (DIN)
Code Electronic housing & filter customer termination - NEMA 4X,
IP66
12 Transient protected filtered termination
Code Existing electronics
03 No hardware, for use with 218A Electronics, World Class IFT, or
Oxymitter or X, V Electronics
07 Westinghouse/Rosemount digital 132 electronics
08 Yokogawa ZA-8 series electronics - max. operating temp of
junction box is 149 °F (65 °C).
09 Other competitive electronics - specify brand and model
Code Hazardous area approval
10 ATEX
Reference Manual Description and specifications
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 13

Table 1-2: Rosemount OXT4CDR Oxymitter Probes (continued)
20 CSA
Table 1-3: Rosemount OXT4CNF: Oxymitter 4000 - In Situ Oxygen Transmitter
Code Sensing probe without flame arrestor
1 Ceramic diffusion element probe (ANSI 3 in. [76,2 mm] 150 lb.
[68 kg])
2 Snubber diffusion element (ANSI 3 in. [76,2 mm] 150 lb. [68 kg])
3 Ceramic diffusion element probe (DIN 2527) - ¼-in. (6.35 mm)
tube fittings
4 Snubber diffusion element (DIN 2527) - ¼-in. (6.35 mm) tube
fittings
7 Ceramic diffusion element probe (ANSI 3 in. [76.2 mm] 300 lb.
[136,1 kg])
8 Ceramic diffusion element probe (ANSI 4 in. [101.6 mm] 300 lb.
[136.1 kg])
Code Probe assembly
0 18 in. (457 mm) probe
3 3 ft. (0.91 m) probe
5 6 ft. (1.83 m) probe
Code Mounting adapter - 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 mounting plate (with Model 218 shield removed)
3 Adapter plate required - must reference adapter plate part
number.
Code Mounting adapter - probe side
0 No adapter plate
1 Probe only (ANSI)
4 Probe only (DIN)
Code Electronics housing & filtered customer termination, NEMA
4X, IP66
12 HART electronics, mounted integral to probe, transient
protected termination. ATEX II 2/-G Ex de IIB +H2 T4 Gb/-
14 HART electronics, mounted remotely, transient protected
termination; requires cable. ATEX II 2/- G Ex de IIB +H2 T4 Gb/-
22 HART electronics, mounted integral to probe; Class 1, Div. 1
Groups B, C, D, T2
Description and specifications Reference Manual
October 2019 00809-0100-4340
14 Emerson.com/Rosemount

Table 1-3: Rosemount OXT4CNF: Oxymitter 4000 - In Situ Oxygen Transmitter
(continued)
24 HART electronics, mounted remotely, electronics mounting
hardware included. Probe rating Class I Div. 1, Groups B, C, D T2;
electronics rating Class I Div. II, Group B, C, D T2; requires cable.
Code Communications
1 Electronics with membrane keypad with blind cover
2 Electronics with membrane keypad with window cover
3 Electronics with LOI display with window cover (English only)
Code Language (membrane keypad only)
1 English
2 German
3 French
4 Spanish
5 Italian
Code Calibration accessories
00 No hardware
01 Cal/ref flow meter & reference pressure regulator
Code Electronics to probe cable
00 No cable - integral electronics or reusing existing cable
10 20 ft. (6 m) cable
11 40 ft. (12 m) cable
12 60 ft. (18 m) cable
13 80 ft. (24 m) cable
14 100 ft. (30 m) cable
15 150 ft. (45 m) cable
16 200 ft. (60 m) cable
Table 1-4: Rosemount OXT4CDRNF: Oxymitter 4000 In-Situ Oxygen Transmitter - DR
Probe, Optional Rosemount Xi Electronics, Safe Area Only
Code Sensing probe type without flame arrestor
1 Ceramic diffusion element probe (ANSI), 115 V heater
2 Snubber diffusion element (ANSI), 115 V heater
3 Ceramic diffusion element probe (DIN), 115 V heater
4 Snubber diffusion element (DIN), 115 V heater
7 Ceramic diffusion element probe (ANSI) 3-in. (76 mm) 300 lb.
(136,1 kg) bolt circle for acidic service, 115 V heater
Reference Manual Description and specifications
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 15

Table 1-4: Rosemount OXT4CDRNF: Oxymitter 4000 In-Situ Oxygen Transmitter - DR
Probe, Optional Rosemount Xi Electronics, Safe Area Only (continued)
8 Ceramic diffusion element probe (ANSI) 4-in. (102 mm) 300 lb.
(136,1 kg) bolt circle for acidic service, 115 V heater
Code Probe assembly
0 18 in. (457 mm) probe
3 3 ft. (0.91 m) probe
5 6 ft. (1.83 m) probe
Code Mounting adapter - stack side
0 No adapter plate. For this option, you must select 0 for the
mounting adapter, probe side.
1 New installation - square weld plate with stud
2 Model 218 mounting plate (with model 218 shield removed)
3 Adapter plate required; must reference adapter plate part
number.
Code Mounting adapter - probe side
0 No adapter plate
1 Probe only (ANSI)
4 Probe only (DIN)
Code Electronics housing and filtered customer termination. NEMA
4X, IP66
12 Transient protected filtered termination
Code Arrangement
03 No hardware. For use with 218 analog electronics, world-class IFT
electronics or Rosemount Oxymitter electronics, Xi electronics
04 (1A) Digital
07 (1A) Model 132 digital
08 Yokogawa Electronics
09 Other competitive electronics: specify brand and mode.
Code Hazardous area approval
10 ATEX approved: ATEX II 2G Exd IIB +H2 T4 Gb
20 Class 1, Div 1 Groups B, C, D, T2
Table 1-5: Calibration Components
Part number Description
1A99119G01 Calibration gas kit: Contains 0.4% and 8.0% O2 bottles, 145.3 gal.
(550 L) each (requires two CGA-590 regulators)(1)
1A99119G02 Calibration gas regulators kit: Contains two CGA-590 regulators
Description and specifications Reference Manual
October 2019 00809-0100-4340
16 Emerson.com/Rosemount

Table 1-5: Calibration Components (continued)
Part number Description
1A99119G03 Wall bracket kit for two O2 gas bottles
(1) Calibration gas bottles cannot be shipped via air freight.
Table 1-6: Rosemount Intelligent Multiprobe Test Gas Sequencer Versions (General
Purpose Only)
Part number Description
3D39695G01 Intelligent multiprobe sequencer (IMPS) - 1 probe
3D39695G02 IMPS - 2 probes
3D39695G03 IMPS - 3 probes
3D39695G04 IMPS - 4 probes
3D39695G05 IMPS with 115 V heater - 1 probe
3D39695G06 IMPS with 115 V heater - 2 probes
3D39695G07 IMPS with 115 V heater - 3 probes
3D39695G08 IMPS with 115 V heater - 4 probes
3D39695G09 IMPS with 220 V heater - 1 probe
3D39695G10 IMPS with 220 V heater - 2 probes
3D39695G11 IMPS with 220 V heater - 3 probes
3D39695G12 IMPS with 220 V heater - 4 probes
1.2 Overview
A typical Rosemount™ Oxymitter 4000 should contain the items shown in Figure 1-1.
Record the part number, serial number, and order number of each component of your
system.
The transmitter comes with the following:
•Signal conditioning electronics that output a 4-20 mA signal representing an O2 value.
•A membrane keypad or full function local operator interface for setup, calibration, and
diagnostics.
You can also access information from the transmitter with a HART® handheld
communicator or Asset Management Solution (AMS) software.
1.3 Measurement
Emerson designed the Rosemount™ Oxymitter 4000 to measure the net concentration of
oxygen in an industrial process (i.e., the oxygen remaining after all fuels have been
Reference Manual Description and specifications
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 17

oxidized). The probe is permanently positioned within an exhaust duct or stack and
performs its task without a sampling system.
The equipment measures oxygen percentage by reading the voltage developed across a
heated electrochemical cell, which consists of a small yttria stabilized zirconia (YSZ) disc.
Both sides of the disc are coated with porous metal electrodes. When the equipment is
operated at the proper temperature, the following Nernst equation gives the millivolt
output of the cell:
EMF = KT log10(P1/P2) + C
Where:
•P2 is the partial pressure of the oxygen in the measured gas on one side of the cell.
•P1 is the partial pressure of the oxygen in the reference air on the opposite side of the
cell.
•T is the absolute temperature.
•C is the cell constant.
•K is an arithmetic constant.
Note
For best results, use clean, dry, instrument air (20.95 percent oxygen) as the reference air.
When the cell is at an 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
transmitter to provide exceptional sensitivity at low oxygen concentrations.
The transmitter 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 analyze
on a "dry" basis, the "wet" analysis will, in general, indicate a lower percentage of oxygen.
The difference between the "dry" and "wet" analyses will be proportional to the water
content of the gas stream.
1.4 Configuration
Rosemount™ Oxymitter 4000 Transmitters are available in three length options, giving the
operator flexibility to use an in situ penetration appropriate to the size of the stack or duct.
The options are:
•Length: 18 in. (457 mm), weight: 29 lb. (13.15 kg)
•Length: 3 ft. (0.91 m), weight: 34 lb. (15.42 kg)
•Length: 6 ft. (1.83 m), weight: 44 lb. (19.96 kg)
The electronics control probe temperature and provide an isolated output, 4-20 mA, that
is proportional to the measured oxygen concentration. The power supply can accept
voltages of 90 - 250 Vac and 48/62 Hz; no setup procedures are required. Modulating the
duty cycle of the probe heater portion of the electronics maintains the oxygen sensing cell
Description and specifications Reference Manual
October 2019 00809-0100-4340
18 Emerson.com/Rosemount

at a constant temperature. The electronics accepts millivolt signals generated by the
sensing cell and produces the outputs to be used by remotely connected devices. The
output is an isolated 4-20 mA current.
The transmitter is available with an integral or remote electronics package. Two
calibration gas sequencers are available, the Rosemount IMPS 4000 and the Rosemount
SPS 4001B (Figure 1-2). The operator must install the Rosemount IMPS 4000 and the
Rosemount SPS 4001B in a nonhazardous, explosive-free environment.
Figure 1-2: Rosemount Oxymitter 4000 Autocalibration System Options
A. Rosemount Oxymitter 4000
B. Rosemount SPS 40001B (1 probe). Must be installed in a safe area.
C. Rosemount IMPS 4000 (1 to 4 probes). Must be installed in a safe area or be X- or Z-
purged by the customer.
Systems with multiprobe applications may employ an optional Rosemount IMPS 4000
Intelligent Multiprobe Test Gas Sequencer. The Rosemount IMPS 4000 provides automatic
calibration gas sequencing for up to four Rosemount Oxymitter 4000 units and
accommodates autocailibrations based on the CALIBRATION RECOMMENDED signal from
the transmitter, a timed interval set up in HART® or the Rosemount IMPS 4000, or
whenever a calibration request is initiated.
For systems with one or two transmitter units per combustion process, the operator can
use an optional Rosemount SPS 4001B Single Probe Autocalibration Sequencer with each
transmitter to provide automatic calibration gas sequencing. The sequencer performs
autocalibrations based on the CALIBRATION RECOMMENDED signal from the transmitter,
a timed interval set up in HART, or whenever a calibration request is initiated.
1.5 Features
The cell output voltage and sensitivity increase as the oxygen concentration decreases.
The Rosemount™ Oxymitter 4000 includes:
Reference Manual Description and specifications
00809-0100-4340 October 2019
Rosemount Oxymitter 4000 19

•An optional local operator interface (LOI), which allows continual O2 display and full
interface capability.
•Field replaceable cell, heater, thermocouple, diffuser, and PC boards.
•Rugged 316L stainless steel wetted parts.
•Electronics adaptable for line voltages from 90 - 250 Vac; no configuration is necessary.
•Membrane keypad available in five languages: English, French, German, Italian, and
Spanish.
An operator can communicate with the transmitter in one of three ways:
•Membrane keypad
•Local operator interface (LOI)
•Optional HART® interface
1.5.1 Membrane keypad
The membrane keypad and HART® communications are standard.
Figure 1-3: Membrane Keypad
WARNING
Accessing the probe keypad requires opening the electronics housing.
Opening the electronics housing will cause the loss of all hazardous permits. Opening the
electronics housing in hazardous areas may cause an explosion resulting in loss of
property, severe personal injury, or death.
You may need to get a hot work permit from your company safety officer before opening
the electronic housing.
The membrane keypad, housed within the right side of the electronics housing, provides
flashing LEDs to indicate faults. You can calibrate from the membrane keypad.
Description and specifications Reference Manual
October 2019 00809-0100-4340
20 Emerson.com/Rosemount