Emerson Rosemount 6888A User manual

Quick Start Guide
00825-0100-4890, Rev AC
October 2022
Rosemount™ 6888A
In Situ Oxygen Analyzer

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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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 6888A Analyzer. The AMS software must be upgraded to AMS 8.0 or above.
Contact Emerson's Global Service Center (GSC) at [phone] 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.......................................................................................34
Product certifications................................................................................................................. 41
Declaration of Conformity..........................................................................................................44
China RoHS table........................................................................................................................46
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1 Installation
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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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 analyzer can be installed in general purpose areas only.
Do not install the analyzer 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.
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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.
Figure 1-1: Orienting the optional vee deflector
A. Gas flow direction
B. Vee deflector
C. Diffusion element
D. Set screw
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 2.5 in (64 mm).
NOTICE
Emerson recommends an abrasion-resistant probe tube or
traditional abrasive shield for high velocity particulates in the flue
stream (such as those in coal -fired boilers, kilns, and recovery
boilers). Vertical and horizontal brace clamps are provided for 9 ft
(2.74 m) through 12 ft (3.66 m) probes to provide mechanical
support for the probe.
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Figure 1-2: Rosemount 6888A probe with standard terminations/
electronic housing
A. Dimension (see Table 1-1)
B. Dimension (see Table 1-1)
C. Standard tube
D. Abrasion resistant tube
Note
All dimensions are in inches with millimeters in parentheses.
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Figure 1-3: Rosemount 6888A integral autocalibration housing
A. Dimension (see Table 1-1)
B. Hastelloy diffuser
C. Ceramic diffuser
D. Standard tube
E. Abrasion tube
F. Minimum removal length
Note
All dimensions are in inches with millimeters in parentheses.
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Figure 1-4: Rosemount 6888A integral autocalibration housing
close-up
A. Dimension (see Table 1-1)
B. Reference air vents
C. Calibration gas ¼-in tube fittings 5.0 scfh (2.4 L/min) 20 psig
(1.38 barg)
D. #10 socket head cap screw (external ground)
E. ½-in. NPT conduit connection (power, signal)
F. Reference gas ¼-in. tube fitting 2.0 scfh (1.0 L/min) 20 psig
(1.38 barg)
Note
All dimensions are in inches with millimeters in parentheses.
Table 1-1: Insertion and removal dimensions
Probe length(1) Dimension A
insertion depth
Dimension B
removal envelope
standard housing
Dimension B
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)
3 ft (0.91 m) probe 33.52 in (851.4 mm) 46.6 in (1,184 mm) 50.1 in (1,273 mm)
6 ft (1.83 m) probe 68.52 in
(1,740.4 mm)
82.6 in (2,098 mm) 86.1 in (2,187 mm)
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