Emerson Rosemount 6888C User manual
Quick Start Guide
00825-0100-4891, Rev AC
October 2022
Rosemount™ 6888C In Situ Combustion
Oxygen Analyzer
For Hazardous Areas
Safety instructions
WARNING
Follow installation guidelines.
Failure to follow these installation guidelines could result in death or serious injury. If this equipment is
used in a manner not specified by the manufacturer, the protection it provides against hazards may be
impaired.
Follow all warnings, cautions, and instructions marked on and supplied with the product.
Install equipment as specified in this document.
Ensure that only qualified personnel perform the installation, operation, and maintenance of the
product.
Inform and educate your personnel in the proper installation, operation, and maintenance of the
product.
Follow appropriate local and national codes.
If you do not understand any of the instructions, contact your Emerson representative for
clarification.
WARNING
Explosions
Do not open when an explosive atmosphere may be present.
WARNING
Electrical shock
Do not open while energized.
WARNING
Connect all devices to the proper electrical and pressure sources.
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.
CAUTION
For the standard housing probe and direct replacement probe, only use supply cables and certified
cable glands rated >105 °C.
For the autocalibration housing, only use supply cables and certified cable glands rated > 85 °C.
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2 Emerson.com/Rosemount
NOTICE
Use only factory documented components for repair. Tampering or unauthorized substitution of parts
and procedures can affect the 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 6888C Analyzer. 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.
Contents
Installation................................................................................................................................... 5
Configuration, start-up, and operation.......................................................................................27
Product certifications................................................................................................................. 32
Declaration of Conformity..........................................................................................................36
China RoHS table........................................................................................................................38
October 2022 Quick Start Guide
Quick Start Guide 3
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4 Emerson.com/Rosemount
1 Installation
WARNING
Failure to follow safety instructions could result in serious injury or death.
Before installing this document, read Safety instructions.
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.
1.1 Mechanical installation
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, Emerson can supply a
weld plate for welding to the flue gas duct.
1.1.1 Install probe
Prerequisites
Ensure all components are available to install the probe.
Procedure
1. If using the optional ceramic diffusion element, the vee-deflector
must be correctly oriented. Before inserting the Rosemount 6888C
probe, check the direction of gas flow in the duct. Orient the vee-
deflector so the apex points upstream towards the flow.
2. 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 2.5 in (64 mm).
3. Insert probe through the opening in the mounting flange and bolt
the unit to the flange.
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Quick Start Guide 5
WARNING
Do not allow the temperature of the electronics to exceed 185 °F
(85 °C).
CAUTION
If washing the ducts down during an outage, make sure to first power
down the probes and remove them from the wash area.
Figure 1-1: Rosemount 6888C Probe with standard terminations
and electronics housing
Note
All dimensions are in inches with millimeters in parentheses.
Figure 1-2: Rosemount 6888C Probe with integral
autocalibration housing
Note
All dimensions are in inches with millimeters in parentheses.
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Table 1-1: Removal/installation dimensions
Probe length Dimension A
insertion depth
Dimension B
removal
envelope
standard
housing
Removal
envelope
accessory
housing
18 in (457 mm)
probe
16.1 in (409 mm) 15.77 in
(400.6 mm)
19.26 in
(489.2 mm)
36 in (914 mm)
probe
32.52 in
(826.0 mm)
46.6 in
(1,184 mm)
50.1 in
(1,273 mm)
6 ft (2 m) 68.52 in
(1,740.4 mm)
82.6 in
(2,098 mm)
86.1 in
(2,187 mm)
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Quick Start Guide 7
Figure 1-3: Installation weld plates
A. Dimension (see Table 1-2)
B. Thread dimension (see Table 1-2)
C. Diameter (see Table 1-2)
D. Equally spaced
E. Four studs, lockwashers, and nuts equally spaced on C, diameter
BC
Note
All dimensions are in inches with millimeters in parentheses.
Table 1-2: Installation weld plate dimensions
ANSI DIN
A 7.75 in (196.8 mm)
probe
8.5 in (216 mm) probe
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8 Emerson.com/Rosemount
Table 1-2: Installation weld plate dimensions (continued)
ANSI DIN
B thread 0.625 in (15.88 mm)
probe
(M-16x2)
C diameter 6 in (152 mm) probe 6.7 in (170 mm) probe
Table 1-3: Mounting flange dimensions
ANSI DIN
Flange diameter 8.25 in (209.5 mm)
Hold diameter 0.75 in (19.0 mm)
4 holes equally spaced
on BC
6 in (152 mm) 6.7 in (170 mm)
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Quick Start Guide 9
Figure 1-4: Drip loop and insulation removal
A. Line voltage
B. Logic input/output, 4-20 mA signal
C. Drip loop
D. Stack or duct metal wall
E. Adapter plate
F. Insulation
G. Note
Replace insulation after installing analyzer.
Note
Standard housing probe shown. Accessory housing is similar. Probe
may be vertical or horizontal.
Quick Start Guide October 2022
10 Emerson.com/Rosemount
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