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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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 [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.......................................................................................27
Product certifications................................................................................................................. 32
Declaration of Conformity..........................................................................................................36
China RoHS table........................................................................................................................38
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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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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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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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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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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.
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1.2 Electrical installation
All wiring must conform to local and national codes. Multiple wiring
diagrams are shown in this section. Always refer to the diagrams that apply
to your configuration and disregard all other wiring diagrams.
WARNING
Electrical shock
Failure to install covers and ground leads could result in serious injury or
death.
Disconnect and lock out power before connecting the power supply.
Install all protective covers and ground leads after installation.
To meet the safety requirements of IEC 61010-1 (EC requirement) and
ensure safe operation of this equipment, connect the main electrical
power supply through a circuit breaker (minimum 10 A) which will
disconnect all current-carrying conductors during a fault situation.
This circuit breaker should also include a mechanically operated isolating
switch. If it does not, keep another external means of disconnecting the
power supply from the equipment located close by. Circuit breakers or
switches must comply with a recognized standard such as IEC 947.
To maintain proper earth grounding, ensure a positive connection exists
between the analyzer housing and earth. The connecting ground wire
must be 14 AWG minimum.
Line voltage, signal, and relay wiring should be rated for at least 221 °F
(105 °C).
1.2.1 Wire Rosemount 6888C Analyzer Probe only (no Rosemount 6888Xi
Electronics)
The Rosemount 6888 Analyzer Probe has built-in electronics that control the
heater temperature and amplify the raw O2 milli-volt signal to a linear
4-20 mA.
You can run the 4-20 mA signal lines can be run directly to the control room
and also power the analyzer electronics. There is no O2 display or keypad on
the probe, so you must set up the analyzer through HART® communications
via a Field Communicator or Asset Management Solutions (AMS).
Procedure
1. Remove the cover from the probe.
2. Connect the line (L1 wire) to the L1 terminal, the neutral (L2 wire) to
the L2/N terminal, and the ground wire to the ground lug.
The analyzer accepts line voltage at 120/240 VAC ±10%, 50/60 Hz.
No setup is required.
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3. Connect the 4-20 mA signal wires at the analyzer. Use a shielded
twisted wire pair. Do not allow bare shield wires to contact the circuit
boards. Insulate the shield wires prior to termination.
The analyzer electronics are loop-powered (i.e., the 4-20 mA signal
wires supply 24 VDC from the DCS or an external power supply).
4. Terminate the shield only at the analyzer electronics housing unless
using a Rosemount 6888Xi. When using the Rosemount 6888Xi
Advanced Electronics, terminate the shield at both ends.
5. Reinstall cover on analyzer.
1.2.2 Wire standard housing analyzer probe with Rosemount 6888Xi
Electronics
The Rosemount 6888 Xi Electronics serves as an operator interface unit with
a back-lit display and keypad. It is capable of two channels, serving up to two
Rosemount 6888 probes.
Procedure
1. Remove cover screws from the front cover of the Rosemount 6888Xi.
Swing down the front cover of the interface box.
2. Pull out the input/output (I/O) board on the right side of the card
rack inside the Rosemount 6888Xi.
If your system is configured to operate two analyzer probes, there
are two I/O interface boards.
3. Connect the 4-20 mA signal wires at J4 of the I/O board. Attach the
supplied ferrite clamp over the 4-20 mA OUT wires that extend past
the shield.
NOTICE
Installation of the ferrite clamp over the 4-20 mA OUT wires is
required for compliance with the European EMC directive.
4. Terminate the shield of the 4-20 mA signal wires at the designated
ground terminal of the Rosemount 6888Xi. Do not allow bare shield
wires to contact the circuit boards. Insulate the shield wires prior to
termination.
5. Connect the signal wires from the Rosemount SPS (if used) to the
applicable terminals of J3.
Refer to the Rosemount SPS 4001B Manual for wiring details.
6. Reinstall the I/O board in the card rack of the Rosemount 6888Xi.
7. If your system is configured for two channel operation, repeat Step 2
through Step 6 to connect the other probe's signal wires.
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8. Remove the probe's connector from the power supply board located
on the left side of the card rack inside the Rosemount 6888Xi.
9. Connect the line, or L1, wire to the L1 terminal and the neutral, or L2,
wire to the N terminal.
10. Reinstall the power supply connector to the power supply board.
Figure 1-5: Single/dual channel wiring diagrams
Note
A. Except for JP5, JP7, and JP8 on IO board, jumper and switch settings are
factory set and are shown for reference only.
B. IO board 4-20 mA loop power settings.
JP5 Pins 1-2: internal power Rosemount 6888Xi to Rosemount
6888 analyzer.
Pins 2-3: external power Rosemount 6888Xi to Rosemount
6888 analyzer (requires 250 Ω resistor across J4, PR+ to PR-).
JP7/JP8 Pins 1-2: internal power Rosemount 6888Xi to DCS.
Pins 2-3: external power Rosemount 6888Xi to DCS.
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Figure 1-6: Single/dual channel wiring diagram
A. Power supply board
B. Channel #2 IO board
C. Shield ground
D. Channel #1 IO board
E. AC input to P/S
F. Plug
G. Channel #2 alarm relay (Rosemount SPS)
H. Channel #2 4-20 mA/HART® output
I. Channel #1 alarm relay (Rosemount SPS)
J. Channel #1 4-20 mA/HART output
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1.2.3 Connect the analyzer probe with integral autocalibration to HART®
communications
This probe contains gas-switching solenoids so that the Rosemount 6888Xi
Electronics can control the introduction of calibration gases.
You can initiate calibrations in the following ways
•Automatically with a calibration recommended diagnostic
•Automatically with time since last calibration
•Manually with external dry contact
•Manually with HART communications
•With the Rosemount 6888Xi local operator interface (LOI). You can only
use integral autocalibration with a Rosemount 6888Xi.
Procedure
1. Remove the two covers from the analyzer.
2. Connect the line (L1 wire) to the L1 terminal, the neutral (L2 wire) to
the L2/N terminal, and the ground wire to the ground lug.
The analyzer accepts line voltage at 120/240 Vac ±10 percent, 50/60
Hz. No setup is required.
3. Connect the 4-20 mA signal wires from the Rosemount 6888Xi to the
connections in the side chamber of the analyzer.
Do not connect the signal wires to the terminals in the main chamber
where the AC input wires are connected. Use a shielded twisted wire
pair. Do not allow bare shield wires to contact the circuit boards.
Insulate the shield wires prior to termination. The 24 VDC loop power
is sourced from the Rosemount 6888Xi.
4. Terminate the shield at both the probe and the Rosemount 6888Xi.
5. Reinstall both covers on analyzer.
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Figure 1-7: Integral autocalibration and HART communications
A. Ferrite clamp
B. Signal
C. Test points
D. #8 pan htd scr (internal ground)
E. Power
F. Test point group
Note
A. Except for JP5, JP7, and JP8 on the input/output (IO) board, jumper and switch settings are
factory set and are shown for reference only.
B. IO board: 4-20 mA/HART loop power settings
•JP5
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—Pins 1-2: internal power Rosemount 6888Xi to Rosemount 6888 analyzer
—Pins 2-5: external power Rosemount 6888Xi to Rosemount 6888 analyzer (requires
2,500 resistor across J4, PR+ to PR-)
•JP7/JP8
—Pins 1-2: internal power to DCS
—Pins 2-3: external power Rosemount 6888Xi to DCS
Note
IO board Channel 2 is a duplicate of Channel 1.
1.2.4 Connect the analyzer probe with integral autocalibration to
FOUNDATION™ Fieldbus communications
This probe contains gas-switching solenoids, so that the Rosemount 6888Xi
Electronics, Field Communicator, or Asset Management Solutions (AMS)
software can control the introduction of calibration gases.
You can initiate calibrations in the following ways
•Automatically with a calibration recommended diagnostic
•Automatically with time since last calibration
•Manually with external dry contact
•With the Rosemount 6888Xi local operator interface (LOI). You can only
use integral autocalibration with a Rosemount 6888Xi.
Procedure
1. Remove the two covers from the analyzer.
2. Connect the line (L1 wire) to the L1 terminal, the neutral (L2) wire to
the L2/N terminal, and the ground wire to the ground lug.
The analyzer accepts line voltage at 120/240 VAC ±10 percent, 50/60
Hz. No setup is required.
3. Connect the FOUNDATION Fieldbus wires from the analyzer side
housing to the FF segment.
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WARNING
The Rosemount 6888 probe is not rated as intrinsically safe (IS) and
will render any IS or FISCO segment it is wired to as non-IS.
Use a shielded twisted wire pair.
Do not allow bare shield wires to contact the circuit boards.
4. Terminate the shield at both the probe and the Rosemount 6888 Xi
Advanced Electronics.
Note
The FOUNDATION Fieldbus signal represents the O2 value and also
powers the probe-mounted electronics.
5. Reinstall both covers on analyzer.
Figure 1-8: Integral autocalibration and FOUNDATION Fieldbus
communication without optional Rosemount 6888Xi
A. Signal
B. Not used
C. #8 pan htr scr (internal ground)
D. Power
E. Probe test point group
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Figure 1-9: Integral autocalibration and FOUNDATION Fieldbus
communication with optional Rosemount 6888Xi
A. Ribbon cable to display board J2 Sensor 1
B. Signal
C. HART® connection (Used as a communication bus from probe analyzer
electronics to optional Rosemount 6888Xi. Not accessible to Field
Communicator or AMS)
D. #8 pan htr scr (internal ground)
E. Power
F. Probe test point group
IO board switch/jumpers
Jumper settings
JP1 Pins 2-3
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JP2 Pins 2-3
JP5 Pins 1-2: internal power
Pins 2-3: external power
JP7 Pins 1-2: internal power
Pins 2-3: external power
JP8 Pins 1-2: internal power
Pins 2-3: external power
SW4 switch settings
•Position 1: Off
•Position 2: Off
•Position 3: Off
•Position 4: Off
NOTICE
A. Except for JP5, JP7, and JP8 on the input/output (IO) board, jumper and
switch settings are factory set and are shown for reference only.
B. IO board 4-20 mA/HART loop power settings
JP5
•Pins 1-2: internal power Rosemount 6888Xi to Rosemount 6888
Analyzer.
•Pins 2-3: external power Rosemount 6888Xi to Rosemount 6888
Analyzer (requires 2,500 resistor across J4, PR+ to PR-).
JP7/JP8
•Pins 1-2: internal power Rosemount 6888Xi to DCS.
•Pins 2-3: external power Rosemount 6888Xi to DCS.
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