Quick Start Guide
00825-0100-4890, Rev AB
October 2019
Rosemount™ 6888A
O2 Combustion Flue Gas Transmitter
Quick Start Guide October 2019
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.
• Use only factory documented components for repair. Tampering or unauthorized substitution of
parts can affect product performance and cause unsafe operation of your process.
NOTICE
The Field Communicator must be upgraded to System Software 2.0 with graphic license for operation
with the Rosemount™ 6888A Transmitter. The AMS software must be upgraded to AMS 8.0 or above.
Contact Emerson's Global Service Center (GSC) at +1-800-833-8314 to upgrade the Field
Communicator software to System Software 2.0 with graphic license.
Symbols
Earth (ground) terminal
Protective conductor terminal
Risk of electrical shock
Refer to reference manual.
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.
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October 2019 Quick Start Guide
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.
WARNING
Explosions
Do not open when an explosive atmosphere may be present.
WARNING
Electrical shock
Do not open while energized.
CAUTION
Equipment damage
For the standard housing probe and direct replacement probe, only use supply cables & certified
cable glands rated > 221 °F (105 °C).
For the autocal housing, only use supply cables and certified cable glands rated > 185 °F (85 °C).
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.
Contents
Install........................................................................................................................................... 5
Configuration, startup, and operation........................................................................................ 27
Product certifications................................................................................................................. 33
Declaration of Conformity..........................................................................................................36
China RoHS Table....................................................................................................................... 38
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Quick Start Guide October 2019
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October 2019 Quick Start Guide
1 Install
WARNING
Failure to follow safety instructions could result in serious injury or death.
Before installing this equipment, read the Essential Instructions at the front
of this document.
WARNING
Electrical shock
Failure to install covers and ground leads could result in serious injury or
death.
Install all protective covers and ground leads after installation.
WARNING
Hazardous areas
The transmitter can be installed in general purpose areas only.
Do not install the transmitter in hazardous areas or in the vicinity of
flammable liquids.
CAUTION
Equipment damage
If external loop power is used, the power supply must be a safety extra low
voltage (SELV) type.
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Quick Start Guide October 2019
1.1 Install probe
Most combustion processes run only slightly negative or positive in pressure,
so that the probe flange is for mechanical mounting only. The probe is not
rated for high pressures. If this is a new installation, a weld plate for welding
to the flue gas duct can be supplied.
WARNING
Electrical shock
Failure to install covers and ground leads could result in serious injury or
death.
Install all protective covers and ground leads after installation.
WARNING
Hazardous areas
The transmitter can be installed in general purpose areas only.
Do not install the transmitter in hazardous areas or in the vicinity of
flammable liquids.
Procedure
1. Ensure all components are available to install the probe.
If using the optional ceramic or Hastelloy diffusion element, make
sure to orient the vee deflector correctly.
2. Before inserting the probe, check the direction of gas flow in the
duct. Orient the vee deflector so the apex points upstream toward
the flow.
See Figure 1-1.
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October 2019 Quick Start Guide
Figure 1-1: Orienting the Optional Vee Deflector
A. Gas flow direction
B. Vee deflector
C. Diffusion element
D. Setscrew
E. Vee deflector
F. Filter
G. Apex
3. If using the standard square weld plate or an optional flange
mounting plate, weld or bolt the plate onto the duct.
The through hole diameter in the stack or duct wall and refractory
material must be at least 2½-in. (63.5 mm).
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Quick Start Guide October 2019
Figure 1-2: Rosemount 6888A Probe with Standard
Terminations/Electronic Housing
Note
All dimensions are in inches with millimeters in parentheses.
Figure 1-3: Rosemount 6888A Integral Autocal Housing
A. Dimension (see Table 1-1)
B. Dimension (see Table 1-1)
C. Hastelloy diffuser
D. Ceramic diffuser
Note
All dimensions are in inches with millimeters in parentheses.
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October 2019 Quick Start Guide
Figure 1-4: Rosemount 6888A Integral Autocal Housing Close-up
A. Dimension (see Table 1-1)
B. Dimension (see Table 1-1)
C. Calibration gas ¼ tube fittings 5.0 SCFH (2.4 L/min) 20 psi (138
kPa)
D. #10 socket head cap screw (external ground)
E. ½ NPT conduit connection (power, signal)
F. Reference gas ¼ tube fitting 2.0 SCFH (1.0 L/min) 20 psi (138
kPa)
G. Reference air vents
Note
All dimensions are in inches with millimeters in parentheses.
Table 1-1: Removal/Installation
Probe length
18 in. (457 mm)
probe
3 ft. (0.91 m) probe 33.52 in. (826 mm) 46.6 in. (1182 mm) 50.1 in. (1271 mm)
6 ft. (1.83 m) probe 68.52 in. (1740 mm) 82.6 in. (2097 mm) 86.1 in. (2186 mm)
Quick Start Guide 9
(1)
Dim A insertion
depth
16.1 in. (409 mm) 15.77 in. (401 mm) 19.26 in. (490 mm)
Dim B removal
envelope standard
housing
Dim B removal
envelope accessory
housing
Quick Start Guide October 2019
Table 1-1: Removal/Installation (continued)
Probe length
9 ft. (2.74 m) probe 104.52 in. (2655 mm) 118.6 in. (3011 mm) 122.1 in. (3100 mm)
12 ft. (3.66 m) probe 140.52 in. (3569 mm) 154.6 in. (3926 mm) 158.1 in. (4015 mm)
(1) Add 3.8 in. (96 mm) to Dim A and Dim B for probe with ceramic or Hastelloy diffuser.
(1)
Dim A insertion
depth
Dim B removal
envelope standard
housing
Dim B removal
envelope accessory
housing
The through hole diameter in the stack or duct wall and refractory
material must be at least 63.5 mm (2½ in.)
4. Insert probe through the opening in the mounting flange and bolt
the unit to the flange.
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Figure 1-5: Probe Installation
A. Dimension (see Table 1-3)
B. Dimension (see Table 1-3)
C. Dimension (see Table 1-3)
D. Four studs, lockwashers, and nuts equally spaced on C dia. B C
Table 1-2: Mounting flange
ANSI DIN
Flange diameter 7.28 in. (185 mm)
Hole diameter .75 in. (20 mm)
(4) holes eq sp on BC 4.75 in. (121 mm) 5.71 in. (145 mm)
Table 1-3: Installation Weld Plate Outline
Dimension ANSI DIN
A 152 in. (600 mm) 191 in. (750 mm)
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Quick Start Guide October 2019
Table 1-3: Installation Weld Plate Outline (continued)
Dimension ANSI DIN
B thread 11 in. (62.5 mm) M16x2
C diameter 121 in. (475 mm) 145 in. (579 mm)
Figure 1-6: Drip Loop and Insulation Removal
A. Line voltage
B. Logic I/O, 4-20 mA signal
C. Stack or duct metal wall
D. Adapter plate
E. Insulation
F. Note
Replace insulation after installing Rosemount 6888A
Note
Standard housing probe shown. Accessory housing is similar. Probe
installation may be vertical or horizontal.
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