Emerson Rosemount 6888C Quick Start Manual

Quick Start Guide

00825-0100-4891, Rev AB

October 2019

Rosemount™ 6888C In-Situ Combustion
Oxygen Analyzer

For use in Hazardous Areas

Quick Start Guide October 2019

NOTICE

This guide provides basic guidelines for Rosemount 6888 In-Situ Oxygen Analyzers. It does not provide
instructions for configuration, diagnostics, maintenance, service, troubleshooting, or flame-proof
installations. Refer to the Rosemount 6888C Manual for more instruction.

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 instruction 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 and unauthorized substitution

and 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™ 6888C O2 Transmitter. 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.

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The following definitions apply to Warnings, Cautions, and Notices 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.

NOTICE

Highlights an essential operating procedure, condition, or statement.

WARNING

EXPLOSION
Do not open when an explosive atmosphere may be present.

WARNING

ELECTRIC 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 > 105 °C (221 °F).

CAUTION

EQUIPMENT DAMAGE
For the autocal housing, only use supply cables and certified cable glands rated > 85 °C (185 °F).

Contents

Install........................................................................................................................................... 5

Configuration, startup, and operation........................................................................................ 26

Rosemount™ 6888 product certifications................................................................................... 31

Declaration of Conformity..........................................................................................................35

Quick Start Guide 3

Quick Start Guide October 2019

China RoHS Table....................................................................................................................... 37

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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.

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, 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.

1.1.1 Probe installation

Complete the following steps to install the probe in the duct.

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 vee­deflector so the apex points upstream towards the flow.

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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 2½ in. (63.5 mm).

3. Insert probe through the opening in the mounting flange and bolt
the unit to the flange.

Figure 1-1: Rosemount™ 6888C Probe with Standard
Terminations/Electronics Housing

Note

All dimensions are in inches with millimeters in parentheses.

Figure 1-2: 6888C Probe with Integral Autocal Housing

Table 1-1: Removal/Installation

Probe length DIM A insertion

depth

18 (457) probe 16.10 (409) 15.77 (401) 19.26 (490)

36 (910) probe 32.52 (826) 46.6 (1182) 50.1 (1271)

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DIM B removal
envelope
standard
housing

DIM removal
envelope
accessory
housing

October 2019 Quick Start Guide

Table 1-1: Removal/Installation (continued)

Probe length DIM A insertion

depth

6 ft (1830) probe 68.52 (1740) 82.6 (2097) 86.1 (2186)

DIM B removal
envelope
standard
housing

DIM removal
envelope
accessory
housing

Figure 1-3: Probe Installation

Table 1-2: Mounting Flange

ANSI DIN

Flange diameter 8.25 (210)

Hold diameter .75 (20)

(4) holes eq sp on BC 6.00 (152) 6.70 (170)

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Table 1-3: Installation weld plate outline

ANSI DIN

A 7.75 (197) 8.5 (215)

B thread .625 (11) (M-16x2)

C dia 6.00 (152) 6.70 (170)

Figure 1-4: 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 6888C.

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 transmitter 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 (min 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 breaks or
switches must complay with a recognized standard such as IEC 947.

To maintain proper earth grounding, ensure a positive connection exists
between the transmitter 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™ 6888 Transmitter Probe only (no Rosemount 6888 Xi Electronics)

The Rosemount 6888 Transmitter Probe has built-in electronics that control
the heater temperature and amplify the raw O2 millivolt 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 transmitter electronics. There is no O2 display or keypad
on the probe, so you must set up the transmitter 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.

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Quick Start Guide October 2019

The Rosemount 6888C accepts line voltage at 120/240 Vac ±10%,
50/60 Hz. No setup is required.

3. Connect the 4-20 mA signal wires at the transmitter. 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 transmitter electronics are loop-powered (i.e., the 4-20 mA
signal wires supply 24 Vdc from the DCS or an external power
supply).

Figure 1-5: Rosemount 6888C Standard Probe Housing

4. Terminate the shield only at the transmitter electronics housing
unless using a Rosemount 6888 Xi. When using the Rosemount 6888
Xi Advanced Electronics, terminate the shield at both ends.

5. Reinstall cover on transmitter.

1.2.2 Wire standard housing transmitter probe with Rosemount™ 6888 Xi Electronics

The Rosemount 6888 Xi Electronics serves as an operater 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 6888
Xi. Swing down the front cover of the interface box.

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2. Pull out the I/O board on the right side of the card rack inside the
Rosemount 6888 Xi.

If your system is configured to operate two transmitter 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.

Note

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 6888 Xi. 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 SPS or IMPS (if used) to the
applicable terminals of J3.

Refer to the SPS or IMPS reference manual for wiring details.

6. Reinstall the I/O board in the card rack of the Rosemount 6888 Xi.

7. If your system is configured for two channel operation, repeat Step 2
through Step 6 to connect the other probe's signal wires.

8. Remove the probe's connector from the power supply board located
on the left side of the card rack inside the Rosemount 6888 Xi.

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.

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Figure 1-6: Wiring Diagrams - Single/Dual Channel Wiring Diagram

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 6888 Xi to Rosemount 6888

Transmitter.
Pins 2-3 external power Rosemount 6888 Xi to Rosemount 6888

Transmitter (requires 250 Ω resistor across J4, PR+ to PR-).

• JP7/JP8: Pins 1-2 internal power Rosemount 6888 Xi to DCS.

Pins 2-3 external power Rosemount 6888 Xi to DCS.

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Figure 1-7: Wiring Diagrams - 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 SPS/IMPS
H. Channel #2 4-20 mA / HART output

I. Channel #1 alarm relay SPS/IMPS
J. Channel #1 4-20 mA/HART output

1.2.3 Connect the transmitter probe with integral autocal to HART

®

communications

This probe contains gas-switching solenoids so that the Rosemount™ 6888 Xi
Electronics can control the introduction of calibration gases. Calibrations can
be initiated via a calibration recommended diagnostic, time since last

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Quick Start Guide October 2019

calibration, manually via external dry contact, HART communications, or
from the Rosemount 6888 Xi local operator interface keypad. The integral
autocal feature can only be implemented when the probe is used with a
Rosemount 6888 Xi.

Procedure

1. Remove the two covers from the transmitter.

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 Rosemount 6888C accepts line voltage at 120/240 Vac ±10%,
50/60 Hz. No setup is required.

3. Connect the 4-20 mA signal wires from the Rosemount 6888 Xi to
the connections in the side chamber of the transmitter.

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 6888 Xi.

4. Terminate the shield at both the probe and the Rosemount 6888 Xi
Advanced Electronics.

5. Reinstall both covers on transmitter.

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Figure 1-8: Integral autocal 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 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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Quick Start Guide October 2019

— Pins 1-2: internal power Rosemount 6888 Xi to Rosemount 6888 transmitter

— Pins 2-5: external power Rosemount 6888 Xi to Rosemount 6888 transmitter

(requires 2,500 resistor across J4, PR+ to PR-)

• JP7/JP8
— Pins 1-2: internal power to DCS

— Pins 2-3: external power Rosemount 6888 Xi to DCS

Note

I/O board - Channel 2 is a duplicate of Channel 1.

1.2.4 Connect the transmitter probe with integral autocal to FOUNDATION
Fieldbus communications

This probe contains gas-switching solenoids so that the Rosemount™ 6888 Xi
Electronics, Field Communicator, or AMS can control the introduction of
calibration gases. Calibrations can be initiated via a calibration
recommended diagnostic, time since last calibration, manually via external
dry contact, or from the Rosemount 6888 Xi local operator interface keypad.
The integral autocal feature can only be implemented when the probe is
used with a Rosemount 6888 Xi.

Procedure

1. Remove the two covers from the transmitter.

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 Rosemount 6888C accepts line voltage at 120/240 Vac ±10%,
50/60 Hz. No setup is required.

3. Connect the FOUNDATION Fieldbus wires from the Rosemount 6888
side housing to the FF segment.

Note that the Rosemount 6888 probe is not rated as intrinsically safe
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 transmitter.

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Figure 1-9: Integral Autocal and FOUNDATION Fieldbus Communications
without Optional Rosemount 6888 Xi

A. Signal
B. Not used
C. #8 pan htr scr (internal ground)

D. Power

E. Probe test point group

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Quick Start Guide October 2019

Figure 1-10: Integral autocal and FOUNDATION Fieldbus Communications
and Optional Rosemount 6888Xi

A. Ribbon cable to display board J2 Sensor 1
B. Signal
C. HART® connection (Used as a communication bus from probe

transmitter electronics to optional Rosemount 6888 Xi. 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

• Postion 2: Off

• Position 3: Off

• Position 4: Off

NOTICE

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/HART loop power settings

JP5

• Pins 1-2 internal power Rosemount 6888 Xi to Rosemount 6888

Transmitter.

• Pins 2-3 external power Rosemount 6888 Xi to Rosemount 6888

Transmitter (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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Quick Start Guide October 2019

Figure 1-11: Wiring Diagrams - Integral Autocal and FOUNDATION
Fieldbus, Communications with Rosemount 6888Xi

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, SPS/IMPS
H. Channel #2 4-20 mA/HART output

I. Channel #1 alarm relay, SPS/IMPS
J. Channel #1 4-20 mA/HART output

1.2.5 Connect traditional architecture system to the direct replacement probe

Use a traditional architecture configuration to provide for remote location of
the transmitter electronics. All electronics are housed inside the

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October 2019 Quick Start Guide

Rosemount™ 6888 Xi. A multi-conductor power/signal cable connects the
probe to the Rosemount 6888 Xi. Use the following procedure to connect
the traditional architecture probe to the Rosemount 6888 Xi.

Note

The traditional architecture cable is provided at the specified length and is
ready for installation. The cable glands must be properly terminated to
maintain EMC/EMI noise protection.

Procedure

1. Run the 7-conductor cable between the traditional architecture
probe and the installation site for the Rosemount 6888 Xi.

Use new cable conduit or trough as needed.

2. Install the cable and lead wires to the probe per manufacturer's
instructions.

3. Install the cable at the probe housing and at the Rosemount 6888 Xi
enclosure.

a) Unscrew locking nut from gland assembly and slide locking

nut back along cable.

b) Pull the gland body away from the plastic insert.

Use care not to damage the cable shield braid.

c) Insert the cable wires into the proper entry port in either the

probe housing or the Rosemount 6888 Xi enclosure.

d) At the probe housing, apply Teflon tape or similar sealing

compound to the tapered pipe threads. Thread the gland
body into the probe housing until properly seated.

e) At the Rosemount 6888 Xi enclosure, insert the gland body

into the left front cable port from the inside of the enclosure.
Use the rubber O-ring provided to seal the cable port.

f) Ensure the cable shield braid is evenly formed over the gray

insert.
When properly formed, the braid should be evenly spaced

around the circumference of the insert and not extend
beyond the narrow diameter portion.

g) Carefully press the gray insert into the gland body.

The grooves on the insert should align with similar grooves
inside the gland body. Press the insert in until it bottoms out
in the gland body.

h) Slide the locking nut up and thread it onto the gland body.

Tighten the locking nut so the rubber grommet inside the

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Quick Start Guide October 2019

plastic insert compresses against the cable wall to provide an
environmental seal.

4. At the Rosemount 6888 Xi, connect the cable leads to the
connectors on the transmitter I/O board.

Figure 1-12: Wiring Diagrams - Traditional Architecture with Direct
Replacement Probe (no Electronics Inside)

Note

A. See the Rosemount 6888 Xi Reference Manual for additional installation

and operating instructions.

B. All wiring marked with an asterisk (*) is factory wiring inside the

Rosemount 6888 Xi.

C. Except for JP7 and JP8 on IO board, jumper and switch settings are

factory set and are shown for reference only.

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Figure 1-13: Wiring Diagrams - Traditional Architecture with Direct
Replacement Probe (no Electronics Inside)

A. Power supply board
B. DR board
C. Shield ground

D. IO board

E. Plug

F. Probe cable
G. AC input
H. Alarm relay, SPS/IMPS

I. 4-20 mA/HART® output

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Quick Start Guide October 2019

1.3 Pneumatic installation

1.3.1 Calibration gas

The transmitter uses two calibration gas concentrations, low gas - 0.4% O2,
balance N2, and high gas - 8% O2, balance N2.

CAUTION

Calibration reading errors

Failure to use proper gases will result in erroneous readings.

Do not use 100% nitrogen as a low gas (zero gas). Emerson suggests that
gas for the low (zero) be between 0.4% and 2.0% O2.

Do not use gases with hydrocarbon concentrations of more than 40
parts per million.

CAUTION

Equipment damage

If the ducts will be washed down during outage, verify that 6888C units have
been powered down and removed from the wash areas.

CAUTION

Equipment damage

Damage can result from having a cold unit exposed to the process gases.

Upon completing installation, ensure that the transmitter is turned on
and operating prior to firing up the combustion process.

During outages, if possible, leave all units running to prevent
condensation and premature aging from thermal cycling.

See Figure 1-14 for the calibration gas connections.

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Figure 1-14: Rosemount 6888C Calibration Gas Connections

A. Calibration gas in
B. Reference air vent
C. Reference air in

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Quick Start Guide October 2019

2 Configuration, startup, and operation

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.

CAUTION

Equipment damage

If external loop power is used, the power supply must be a safety extra low
voltage (SELV) type.

2.1 Power up transmitter without Rosemount™ 6888 Xi

Procedure

1. Apply AC line power to the transmitter.

2. Apply 24 Vdc loop power to the transmitter.

3. Using either the DCS control or a Field Communicator, verify
communications to the transmitter.
The transmitter probe takes approximately 45 minutes to warm up
to the 1357 °F (736 °C) heater setpoint. The 4-20 mA signal remains
at a default value of 3.5 mA, and the O2 reading remains at 0%
through this warm-up period. After warm-up, the probe begins
reading oxygen, and the 4-20 mA output is based on the default
range of 0-10% O2.

If there is an error condition at startup, an alarm message is
displayed.

2.2

Power up transmitter with single/dual channel or single channel

Complete the following steps to power up the transmitter using the
Rosemount™ 6888 Xi Electronics.

Procedure

1. Apply AC line power to the transmitter.

2. Apply AC line power to the Rosemount 6888 Xi. Run the Quick Start
Wizard as described below. At the Auto Cal Device screen, select the

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calibration method based on the Rosemount 6888 Transmitter as
follows:

• Standard Probe Housing Configuration: Select None, SPS, or IMPS

as appropriate. Do not select Integral or calibration will not be
possible.

• Integral Autocal Probe housing: Select Integral only. If you don't

select Integral, calibration will not be possible.

3. Verify communications between the transmitter and the Rosemount
6888Xi.

The Rosemount 6888 Xi display is preconfigured to display O2 and
cell temperature for single channel configurations and both O
readings for dual channel configurations.

The transmitter probe takes approximately 45 minutes to warm up
to the 1357 °F (736 °C) heater setpoint. The 4-20 mA signal remains
at a default value of 3.5 mA, and the O2 reading remains at 0%
through this warm-up period. After warm-up, the probe begins
reading oxygen, and the 4-20 mA output is based on the default
range of 0-10% O2.

If there is an error condition at startup, an alarm message is
displayed.

2

2.3 Power up the Rosemount™ 6888 direct replacement probe (no electronics inside) with traditional architecture Rosemount 6888 Xi

Procedure

1. Apply AC line power to the Rosemount 6888 Xi.

2. Run the Quick Start Wizard as described in Run Rosemount™ 6888 Xi

Quick Start Wizard.

3. At the Auto Cal Device screen, select None, SPS, or IMPS as
appropriate.

Do not select Integral or calibration will not be possible.

The transmitter probe takes approximately 45 minutes to warm up to the
736 °C (1357 °F) heater setpoint. The 4-20 mA signal remains at a default
value of 3.5 mA, and the O2 reading remains at 0% through this warm-up
period. After warm up, the probe begins reading oxygen, and the 4-20 mA
output is based on the default range of 0-10% O2.

If there is an error condition at startup, an alarm message is displayed on the
Rosemount 6888Xi.

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Quick Start Guide October 2019

2.4 Run Rosemount™ 6888 Xi Quick Start Wizard

When you first power up the Rosemount 6888 Xi, a short wizard program
guides you through the basic setup. Once configured, the Rosemount
6888Xi retains the setup, and the wizard will not repeat.

Procedure

1. Apply power to the Rosemount 6888 Xi.
Once boot-up is complete, the Quick Start Wizard screen appears.
With a dual channel Rosemount 6888 Xi, the wizard runs for both
channels in succession.

2. Press Enter to continue.

3. At the Sensor Type screen, use the Up and Down keys to select O2.

Do not select CO as this option is reserved for future use.

4. Press Enter to continue.

5. At the Device Type screen use the Up and Down keys to select
HART® or FF (FOUNDATION™ Fieldbus), whichever applies.

6. At the Auto Cal Device screen, use the Up and Down keys to select
the calibration method to be used. The methods are defined as
follows:

• None: Manual calibration with the standard probe housing

configuration.

• SPS: Automatic calibration with the standard probe housing

configuration using the Rosemount SPS 4001B.

• IMPS: Automatic calibration with the standard probe housing

configuration using the Rosemount IMPS.

• Integral: Automatic calibration with the integral autocal probe

housing configuration.

7. Press Enter to continue.

Note

If you select SPS, IMPS, or Integral, you must still configure automatic
calibration as On. Verify other parameters, such as test gas values
and gas times, as well. Refer to the Rosemount 6888 Xi Reference

Manual for calibration setup details.

8. When prompted by Setup Correct?, use the Up and Down keys
to select Yes.

If you select No, the wizard restarts.

9. Press Enter to continue.

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The Rosemount 6888 Xi displays several screens while saving the
configuration, resets itself, and then returns to the main screen.

2.5 Calibration

2.5.1 Manual/semi-automatic calibration

A technician can calibrate the Rosemount 6888 probe with standard housing
by following prompts via the display of the Rosemount 6888 Xi Electronics
or via HART® communications to a Field Communicator or AMS console. The
technician needs to manually switch the gases based upon these prompts.
Emerson recommends using 0.4% O2 and 8% O2, balance nitrogen as
calibration gases. Always use a two-stage pressure regulator set to 20 psi.
Set the calibration gas flow meter for a maximum of 5 scfh with the cal gas
fitting removed from the probe. A diffuser/filter that is plugged over time
may cause the flow meter to deliver less flow to the sensing cell, but never
readjust the flow rate until a new diffuser is installed. Readjusting the flow
meter back up to the 5 scfh level could pressurize the cell during calibration
and cause the O2 reading to shift downwards.

The electronics determine if the calibration was successful and calculate new
calibration values. New calibration values are not automatically loaded into
the electronics after a successful calibration, however. The technician has
the opportunity to accept or reject the new values.

CAUTION

Reading errors

A loose or missing cap can permit fresh air to bias the O2 readings high in
processes that run at negative pressure.

Make sure the calibration gas port is capped tightly between calibrations.

2.5.2 Fully automatic calibration

For fully automatic calibration, the Rosemount™ 6888 Xi Electronics must
manage the actuation of solenoids to introduce gases into the probe.

Probe with standard electronics housing

In addition to the Rosemount™ 6888 Xi, this arrangement requires a
separate single probe sequencer (SPS), which is a solenoid box for switching
calibration gases or a larger intelligent multiprobe sequencer (IMPS) which
can handle the autocal for up to four probes in one box.

The automatic calibrations can be initiated in several ways:

• Calibration recommended diagnostic that is periodically checking cell

impedance.

• Push button on the Rosemount 6888 Xi Electronics.

Quick Start Guide 29

Quick Start Guide October 2019

• HART® communications from a Field Communicator or AMS.

• External contact closure.

• Time since the last successful calibration.

If using the O2 measurement for automatic control, always place the O

2

control loop into manual prior to calibrating. Always inform the operator
prior to calibrating. The Rosemount 6888 Xi Electronics provides an in cal
contact closure for this purpose as well as an initiate cal contact.

The Rosemount 6888 Xi Electronics sequences the calibration gases in turn
into the sensing cell. A 300 second flow time is the factory default for both
gases and also for the purge cycle, which lets the probe signal come back to
the normal flue gas readings. The 4-20 mA signal representing O2 can be
held during the calibration cycle or permitted to vary with the bottled gases,
in which case a record of the calibration can be trended at the DCS.

Calibration setup is found under the detailed setup menu.

Probe with integral autocal housing

This probe contains the autocal solenoids within the blue electronics
housing, eliminating the need and cost for an SPS or IMPS solenoid
enclosure. Both calibration gases are permanently piped into two ports on
the probe. It's important to confirm that there are no piping leaks or the
calibration bottles will leak down permanently.

Note

The calibration sequence from the Rosemount™ 6888 Xi Electronics is
identical to that for the manual/semiautomatic calibration, but note that
with the integral autocal version of this probe it is not possible to conduct a
manual calibration. The factory offers a probe rebuild capability if solenoid
or other failures occur.

CAUTION

Leaks

Calibration gas bottles ARE piped and under pressure at all times, so be
sure to leak-check all fittings, tubing, and connections.

Always use dual-stage pressure regulators.

30 Emerson.com/Rosemount

October 2019 Quick Start Guide

A Rosemount™ 6888 product certifications

Rev 1.9

A.1 European Directive information

The most recent revision of the EU Declaration of Conformity can be found
at Emerson.com/Rosemount.

A.2 Ordinary location certification

As standard, the transmitter has been examined and tested to determine
that the design meets the basic electrical, mechanical, and fire protection
requirements by a nationally recognized test laboratory (NRTL) as accredited
by the Federal Occupational Safety and Health Administration (OSHA).

A.3 Installing equipment in North America

The US National Electrical Code® (NEC) and the Canadian Electrical Code
(CEC) permit the use of Division marked equipment in Zones and Zone
marked equipment in Divisions. The marking must be suitable for the area
classification, gas, and temperature class. This information is clearly defined
in the respective codes.

A.4 USA/Canada

Model String
Option Code

CSA
Certificate

Standards

Markings

Quick Start Guide 31

C

70100758

CAN/CSA Standard C22.2 No.0-10:2015, CAN/CSA C22.2
No.61010-1-12 Harmonized UL 61010-1:2012 (3rd
Edition), CAN/CSA Standard C22.2 No. 94.1-15
Harmonized ANSI/UL Standard 50 (2nd Edition), CAN/CSA
Standard C22.2 No. 94.2-15 Harmonized ANSI/UL Standard
50 (2nd Edition), CAN/CSA C22.2 No. 60529:16 and
ANSI/ISA 60529:04, CAN/CSA Standard C22.2 No. 30­M1986: 2016, CAN/CSA-C22.2 No. 60079-0: 2015, CAN/
CSA-C22.2 No. 60079-1:2016, FM 3600:2011, FM
3615:2006, ANSI/UL-60079-0:2013 (6th Edition), ANSI/
UL-60079-1:2015 (7th Edition)

Type 4X, IP66, Class 1, Division 1, Groups B, C and D;
T3, Class 1, Zone 1, AEx db IIB+H2 T3 Gb, Ex db IIB+H2 T3
Gb: -40 °C ≤ Ta ≤ +70 °C ( Autocal Housing and Probe
assembly); -40 °C ≤ Ta ≤ +90 °C (Standard Housing and
Probe assembly eq. “DR Probe”)

Quick Start Guide October 2019

Conditions of acceptability

1. The unit is intended to be connected to supply mains by qualified
personnel in accordance with national (e.g. CEC, NEC, etc) and local
codes.

2. Suitable APPROVED switch and fuse or a circuit breaker shall be
provided to facilitate the disconnection of mains power.

3. The maximum operating ambient is considered as follows: 90 °C for
6888C DR Probe, 70 °C for 6888C Transmitter.

4. Mounting Flange temperature shall not exceed 190 °C during
combustion process.

5. Calibration air lines and reference air lines shall not contain pure
oxygen or combustible gas other than inert/oxygen gas mixture of
which oxygen represents no more than that normally present in air.

6. The pressure within the enclosure and gas lines shall not be higher
than 1.1 times the atmospheric pressure during the normal
operations of the equipment.

7. The 6888C O2 Analyzers are used with the 6888 Xi Advanced
Electronics, which must be installed in a Non-Hazardous Location,
per wiring diagram 6R00131.

8. Meets Enclosure Type 4X & IP66 ratings when the reference air vent is
routed to a dry area.

9. Units installed with conduit runs must have suitably certified conduit
seals installed at the enclosure.

10. Units installed with other than conduit runs and conduit seals, must
be fitted with certified or listed cable glands for use in “Class I, Zone
1, Ex/AEx d IIB+H2” and “Class I, Division 1, Group B, C and D” or
better, suitable for the ambient temperature range.

11. Flameproof joints are not intended to be repaired.

A.5

32 Emerson.com/Rosemount

Europe

Model String
Option Code

ATEX Certificate

Standards

Markings

A

Sira 14ATEX1031X

EN 60079-0:2012/A11:2013, EN 60079-1:2014

II 2 G Ex db IIB+H2 T3 Gb; IP66; -40 °C ≤ Ta ≤ +70°C
( Autocal Housing and Probe assembly); -40 °C ≤ Ta ≤
+90°C (Standard Housing and Probe assembly eq.
“DR Probe”)

October 2019 Quick Start Guide

Special conditions for safe use (X):

1. Mounting flange temperatures shall not exceed 190 °C during
combustion process.

2. The 6888C O2 Analyzers are used with the 6888 Xi Advanced
Electronics (associated equipment not part of this certification)
which must be installed in a Safe Area.

3. Calibration air lines and reference air lines shall not contain pure
oxygen or combustible gas other than inert/oxygen gas mixture of
which oxygen represents no more than that normally present in air.

4. The pressure within the enclosure and gas lines shall not be higher
than 1.1 times the atmospheric pressure during the normal
operations of the equipment.

5. Fasteners property class must be A2-70 Stainless Steel.

6. Flameproof joints are not intended to be repaired.

Model String

A

Option Code

IECEx Certificate

Standards

Markings

IECEx CSA 14.0044X

IEC 60079-0:2012/A11:2013, IEC 60079-1:2014

Ex db IIB+H2 T3 Gb; IP66; -40°C ≤ Ta ≤ +70°C
( Autocal Housing and Probe assembly ); -40 °C ≤ Ta ≤
+90°C (Standard Housing and Probe assembly eq.
“DR Probe”)

Special conditions for safe use (X):

1. Mounting Flange temperature shall not exceed 190 °C during
combustion process.

2. The 6888C O2 Analyzers are used with the 6888 XI Advanced
Electronics (associated equipment not part of this certification)
which must be installed in a safe area.

3. Calibration air lines and reference air lines shall not contain pure
oxygen or combustible gases other than inert/oxygen gas mixture of
which oxygen represents no more than that normally present in air.

4. The pressure within the enclosure and gas lines shall not be higher
than 1.1 times the atmospheric pressure during the normal
operations of the equipment.

5. Fasteners property class must be A2-70 Stainless Steel.

6. Flameproof joints are not intended to be repaired.

Quick Start Guide 33

Quick Start Guide October 2019

34 Emerson.com/Rosemount

October 2019 Quick Start Guide

B Declaration of Conformity

Quick Start Guide 35

Quick Start Guide October 2019

36 Emerson.com/Rosemount

October 2019 Quick Start Guide

C China RoHS Table

Quick Start Guide 37

Quick Start Guide October 2019

38 Emerson.com/Rosemount

October 2019 Quick Start Guide

Quick Start Guide 39

*00825-0100-4891*

00825-0100-4891, Rev. AB

Quick Start Guide

October 2019

GLOBAL HEADQUARTERS

Emerson Automation Solutions
6021 Innovation Blvd
Shakopee, MN 55379, USA

[phone] or [phone]
[phone]
[e-mail]

EUROPE

Emerson Automation Solutions
Neuhofstrasse 19a P.O. Box 1046
CH-6340 Baar
Switzerland

+ 41 (0) 41 768 6111
+ 41 (0) 41 768 6300
[e-mail]

Linkedin.com/company/Emerson-

Automation-Solutions

twitter.com/rosemount_news

Facebook.com/Rosemount

youtube.com/RosemountMeasurement

NORTH AMERICA

Rosemount
8200 Market Boulevard
Chanhassen, MN 55317

[phone]
[phone]
[e-mail]

MIDDLE EAST AND AFRICA

Emerson Automation Solutions
Emerson FZE
Jebel Ali Free Zone
Dubai, United Arab Emirates, P.O. Box
17033

[phone]
[phone]
[e-mail]

©

2019 Emerson. All rights reserved.

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mark of Emerson Electric Co. Rosemount is a
mark of one of the Emerson family of companies.
All other marks are the property of their
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