Rosemount 6888Xi Reference Manual
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Rosemount 6888Xi Reference Manual

Advanced electronics for zirconium oxide flue gas o2 probes
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Reference Manual
00809-0100-4892
Rev. AB
January 2019
Rosemount
6888Xi
™
Advanced Electronics for Zirconium Oxide
Flue Gas O
Probes
2

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Summary of Contents for Rosemount 6888Xi

  • Page 1 Reference Manual 00809-0100-4892 Rev. AB January 2019 Rosemount 6888Xi ™ Advanced Electronics for Zirconium Oxide Flue Gas O Probes...
  • Page 2 Table of Contents...

  • Page 3: Essential Instructions

    The following instructions MUST be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount products. Failure to follow the proper instruc- tions may cause any one of the following situations to occur: Loss of life; personal injury; property damage;...
  • Page 4 Table of Contents...

  • Page 5: Table Of Contents

    Reference Manual Table of Contents 00809-0100-4892 January 2019 Contents Essential Instructions .....................I Section i: Introduction Preface .........................1 Definitions........................1 Symbols........................2 Overview ........................2 Technical Support Hotline....................2 Section 1: Description and Specifications Component Checklist....................3 System Overview......................3 1.2.1 Power Supply – Current Loop Wiring ..............3 1.2.2 System Configurations..................4 1.2.3...
  • Page 6 How do I detect a plugged diffuser?..............76 4.5.4 Can I calibrate a badly plugged diffuser?............76 Section 5: Maintenance and Service Overview ........................79 Maintenance Intervals....................79 Calibration........................80 5.3.1 Automatic Calibration...................80 5.3.2 Manual Calibration..................80 Replacement Parts .....................81 6888Xi Components Replacement................81 5.5.1 I/O Board Replacement.................81 Table of Contents...
  • Page 7 Power Supply Board Replacement ..............87 5.5.4 Front Panel Replacement................88 5.5.5 DR Board Replacement .................90 Section 6: Replacement Parts 6888Xi Electronics .....................93 Calibration Components....................93 Section 7: Optional Accessories HART Handheld 375/475 Field Communicator ............95 Asset Management Solutions (AMS)................95 By-Pass Packages......................95 SPS 4001B Single Probe Autocalibration Sequencer ..........96 IMPS 4000 Intelligent Multiprobe Test Gas Sequencer.
  • Page 8 Table of Contents Reference Manual January 2019 00809-0100-4892 Table of Contents...

  • Page 9: Section I: Introduction

    The purpose of this manual is to provide information concerning components, functions, instal- lation and maintenance of the 6888Xi Electronics. Some sections may describe equipment not used in your configuration. The user should become thoroughly familiar with the operation of this module before operating it.

  • Page 10: Symbols

    If the signal is out of calibration, the calibration gas is used to adjust the 4-20 mA output signal. During calibration the 6888Xi prompts the techni- cian to flow two calibration gases into the probe and, with the calibration gases flowing, automatically adjusts the O2 signal.

  • Page 11: Section 1: Description And Specifications

    Figure 1-1. A complete Oxygen Analyzer system will include some or all of the equipment shown. However, this manual describes item 8 only. Record the part number, serial number, and order number for the Rosemount 6888Xi Advanced Electronics in the table located on the back cover of this manual.

  • Page 12: System Configurations

    Some customers prefer not to mount electronics onto the probe, so a "traditional architecture" version is offered. This probe sends raw millivolt signals via a 7-conductor cable to the 6888Xi electronics, Figure 1-3, which does all heater control and signal conditioning in addition to its display/keypad functions.

  • Page 13: Automatic Calibration

    Figure 1-4, where calibration solenoids are switched from the 6888Xi Advanced Electronics. See IM-106-340AC, SPS 4001B Single Probe Autocalibration Sequencer or IM-106-400IMPS, IMPS 4000 Intelligent Multiprobe Test Gas Sequencer, for additional details.

  • Page 14: Communication Options

    (20.95% O2). • Plugged diffusor diagnostics 2. Using the HART Interface. The 6888Xi’s 4-20 mA output line transmits an analog signal pro- portional to the oxygen level. The HART output is superimposed on the 4-20 mA output line. This information can be accessed through the following: •...
  • Page 15 Refer to section 3.2.1 Configuration to set up for FOUNDATION Fieldbus communications. Optional OxyBalance Display and Averaging System Receives up to eight 4-20 mA signals from individual 6888Xi units. Trends individual outputs and calculates four programmable averages as additional 4-20 mA outputs. OxyBalance graphic dis- plays are shown in Figure 1-5.

  • Page 16: Specifications

    0.4% O2 and 8% O2, balance N2 recommended Traditional Architecture Cable 200 ft (61 m) maxmum length Transmitter Electrical Power: 12 - 24 VDC (loop-powered from control room or 6888Xi) Electrical Power for 6888Xi: 120/240VAC ±10%, 50/60 Hz Power Consumption of 6888Xi:...
  • Page 17 Reference Manual Section 1: Description and Specifications 00809-0100-4892 January 2019 Table 1-1. Product Matrix, Advanced Electronics 6888Xi Advanced Electronics Code Remote Type 1OXY Single Channel O2 2OXY Single Channel O2 with Flame Safety Interlock for Heater 3OXY Dual Channel O...
  • Page 18 Section 1: Description and Specifications Reference Manual January 2019 00809-0100-4892 Table 1-2. Product Matrix, O Autocalibration Accessories XSO2CAL O2 Autocalibration Accessories Code Single Probe Sequencers Autocalibration Options None SPS 4001B Single Probe Sequencer, general purpose NEMA 4X, includes check valve for probe Code Intelligent Multiprobe Sequencers (IMPS) None...

  • Page 19: Section 2: Installation

    WARNING The 6888Xi Advanced Electronics can be installed in general purpose areas only. Do not install the 6888Xi in hazardous areas or in the vicinity of flammable liquids.

  • Page 20: System Considerations

    Voltage Mechanical Installation 6888Xi Advanced Electronics The 6888Xi Advanced Electronics is available in a panel mounting, wall mounting, or pipe mounting configuration. Refer to Figure 2-2 or Figure 2-3 for the panel, wall, or pipe mounting details. 1. Ensure all components are available to install the 6888Xi.
  • Page 21 Reference Manual Section 2: Installation 00809-0100-4892 January 2019 FIGURE 2-2. 6888XI Advanced Electronics - Panel Mounting Details Installation...
  • Page 22 Section 2: Installation Reference Manual January 2019 00809-0100-4892 FIGURE 2-3. 6888XI Advanced Electronics - Wall/Surface and Pipe Mounting Details Installation...

  • Page 23: Electrical Installation

    1. Remove cover screws from the front cover of the 6888Xi. Swing down the front cover of the interface box. 2. Pull out the I/O board on the right-hand side of the card rack inside the 6888Xi. If your sys- tem is configured to operate two transmitter probes there are two I/O interface boards.
  • Page 24 Pull the gland body away from the plastic insert. Use care not to damage the cable shield braid. Insert the cable wires into the proper entry port in either the probe housing or the 6888Xi enclosure. At the probe housing, apply Teflon tape or similar sealing compound to the tapered pipe threads.
  • Page 25 00809-0100-4892 January 2019 At the 6888Xi enclosure, insert the gland body into the left front cable port from the inside of the enclo- sure. Use the rubber O-ring provided to seal the cable port. 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.
  • Page 26 Section 2: Installation Reference Manual January 2019 00809-0100-4892 FIGURE 2-5. Single/Dual Channel Wiring Diagram Installation...
  • Page 27 Reference Manual Section 2: Installation 00809-0100-4892 January 2019 FIGURE 2-5 cont. Single/Dual Channel Wiring Diagram CHANNEL #2 CHANNEL #1 CHANNEL #2 CHANNEL #2 CHANNEL #1 CHANNEL #1 Installation...
  • Page 28 Section 2: Installation Reference Manual January 2019 00809-0100-4892 FIGURE 2-6. Single Channel with Flame Safety Wiring Diagram Installation...
  • Page 29 Reference Manual Section 2: Installation 00809-0100-4892 January 2019 FIGURE 2-6 cont. Single Channel with Flame Safety Wiring Diagram Installation...
  • Page 30 Section 2: Installation Reference Manual January 2019 00809-0100-4892 FIGURE 2-7. Traditional Architecture Wiring Diagram Installation...
  • Page 31 Reference Manual Section 2: Installation 00809-0100-4892 January 2019 FIGURE 2-7 cont. Traditional Architecture Wiring Diagram Installation...
  • Page 32 Section 2: Installation Reference Manual January 2019 00809-0100-4892 Installation...

  • Page 33: Section 3: Configuration, Startup And Operation

    The setting of switch SW4 and the configuration of jumpers JP1 through JP8 must be verified on the I/O board in the 6888Xi. Refer to figures 2-5, 2-6 and 2-7 in Section 2 for additional details. If necessary, the I/O Board can be reset to factory default settings in order to configure the fol- lowing parameters: Sensor Type –...

  • Page 34: Configuration

    2. Press MENU until the “System” menu appears. 3. Select CONFIGURE IOB. 4. Press the ENTER key to continue. 5. Select I/O BOARD 1. (Note: With a dual channel 6888XI, either or both I/O boards may be reset and reconfigured.) 6. Press the ENTER key to continue.

  • Page 35: Error Conditions

    Keypad The 6888Xi can be used to change the software and alarm settings, to adjust the high and low gas settings, and to initiate the calibration sequence. Refer to the following control descriptions. Use the control keys on the front panel of the 6888Xi, Figure 3-2, to navigate the 6888Xi menu, Figure 3-3.
  • Page 36 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 Figure 3-3. 6888Xi Menu (Sheet 1 of 6) !"!#$% &&&&& '()*+,!#(-! &&&&& )./012)34567 !#)#8! &&&&& !"!#$% &&&&& -,%292':7.;<<1.= -,%2>2':7.;<<1.= +?2%16;5@2A4:3 A)-2%16;5@2A4:3 (,B292#@C12%:764=.D (,B2>2#@C12%:764=.D (,B292B4E2-D1.F7G6 (,B2>2B4E2-D1.F7G6 )-H+,IJ$'*$2)J)K%! &&&&& ).F2(,B92B4E2-F7G6 ).F2(,B>2B4E2-F7G62L+;=129M %)(+#$+)+-$ &&&&&...
  • Page 37 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Figure 3-3. 6888Xi Menu (Sheet 2 of 6) !"!#$% &&&&& '()*+*,-./ (0123456$7308 &&&&& 390780:6;7< &&&&& 6$=3!301! &&&&& =->?@)* (A-BC?,D 3087!1 2$:#56$! &&&&& !E)@BA@)D-E-> F>)G76-H->-*B- $IE-*.-.7#-DJ ;@K,?->7LM>*@@*G 2MBE)>N7%).- 6-?-E7O3 6-?-E739078)M>.
  • Page 38 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 Figure 3-3. 6888Xi Menu (Sheet 3 of 6) !"#$%$&'"#($% ))))) &'"*(++ ))))) &'"*(++$,-'!-#.(+ ))))) "/ ,-'!-#.(+ "/$2345 !"#$%$&'"#($/ *366$2345 "/$*366 2(7&('-28'(+ ))))) "/$2345 *9*$2345 #0:1;$2345 "&$70;3 '-<$,-.8(+ ))))) "/$*366 *366$!45 2=*$,06>...
  • Page 39 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Figure 3-3. 6888Xi Menu (Sheet 4 of 6) !"#$%$&'"#($% ))))) *+,-.-/012 *+,-.-/012 *+,-.-/012 *+,-.-/012 !"#$%$&'"#($4 56!78(767+($4 ))))) 9:;3$<=>?,--0?; +@A$'0?,::0-101 +@A$B@=A01 +0AA$!:C$D=EF &3,G0$5=>:@;?F 6<H!I"'J ))))) +@A$+F@-E01 D0@;03$H,A;$K,L &3,G0$+F@-E01 K,L$"4 <=M/>03$N@3-=-E &'(H!"OI...
  • Page 40 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 Figure 3-3. 6888Xi Menu (Sheet 5 of 6) !"#$%$&'"#($% ))))) *+,-.-/012 !"#$%$&'"#($4 #56!+$6(78& ))))) !9(:7!;!+57!": ))))) 7<= 603><?$:/@A03 90B>C0$!9 +"DD8:!+57!": ))))) &,??$51130EE F@G3$51130EE H5'!5#I($D5&&!:J ))))) &H 9(75!I(9$6(78& ))))) 6(:6"' ))))) 7LM$;>?G03...
  • Page 41 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Figure 3-3. 6888Xi Menu (Sheet 6 of 6) !"#$%$&'"#($% ))))) *+,-.-/012 !"#$%$&'"#($4 +56!#'57!"8 ))))) "4$+9:;<39.,- 5<,3=$+9:;<39.,- +9:$>=9=0 +56$+"8>7587> ))))) +?''(87$+56 ))))) >:,@0 +,-A=9-= !B@019-C0 7;B0 '0A0=$+9: +D9-E0$+9: +9:$6,EA F5!6(G$+56 ))))) #91$>:,@0...

  • Page 42: Password Protection

    The password protection will relock itself after a certain number of seconds with no button pushes (defined as "revert time" in the same "LCD setup" menu). The 6888Xi has a "Reset" function that reestablishes all factory default conditions, including the password protection feature, i.e. the password protection will fall back to a disabled condition after a reset.

  • Page 43: Stoichiometer

    Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 NOTE For enhanced software feature option upgrades or to enable the feature to duplicate the existing configu- ration, contact Emerson at 1-800-433-6076. Reference the following: 6A00269G01 Enhanced Software Option Upgrade, Stoichiometric Function 6A00269G02 Enhanced Software Option Upgrade, Programmable Reference Function 6A00269G03...

  • Page 44: Programmable Reference

    Reference Manual January 2019 00809-0100-4892 NOTE Make sure the DCS is configured for the same range as the 6888Xi. For instance: -1 O2 to 10 O2. purchasing the acid resistant stoichiometer cell and the stoichiometer feature inside the 6888Xi. 3.3.3...
  • Page 45 Although instruction manuals are clear in warning against this situation, it still occurs. The new Plugged Diffuser Diagnostic in the 6888Xi electronics operates on the principle of measuring the "return to process" time during the calibration purge cycle (after the second cali- bration gas is removed).
  • Page 46 January 2019 00809-0100-4892 A "Diffuser Warning" alarm will be generated within the 6888Xi if the diagnostic detects a vari- ety of problems related to measuring the “return to process” time. To determine the exact cause for the Diffuser Warning alarm it is necessary to look at the Diffuser Warn parameter. See the Parameter Descriptions for a description of all possible Diffuser Warning indications in the Diff Warn parameter.
  • Page 47 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 expire. If manual calibration gas switching is used, the technician will be prompted to switch gases. In either case, the purge time will be ended automatically once the process reading has settled rather than wait for the configured purge time to expire. •...

  • Page 48: System Parameter Descriptions

    The 375 Field Communicator must be upgraded to System Software 2.0 with Graphic License for operation with the 6888Xi. The AMS software must be upgraded to AMS 8.0 or above for operation with the 6888Xi. Contact Emerson’s Global Service Center (GSC) at 1-800-833-8314 to upgrade the 375 Field Communicator software to System Software 2.0 with Graphic License.
  • Page 49 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Table 3-4. System Parameters (1 of 3) CPU Parameter Name Units Description Active Alarms Current Alarms Version Software version number for the User Interface board Build Num Software build number for the User Interface board Restart Count Device restarts counter for the User Interface board System Tag: Up to 8 characters long.
  • Page 50 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 Table 3-4. System Parameters (2 of 3) CPU Parameter Name Units Description Two-Probe Format Main display: Line 1 data for two probe configuration: Line1, Center 0 displays PV (O2) 1 displays SV (O2 Temp) Line 1 &...
  • Page 51 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Table 3-4. System Parameters (3 of 3) CPU Parameter Name Units Description Contrast Display contrast. (120-220) Password Xi Password: 4 numeric characters. Enable Password Enable password protection. (No/Yes) Flash Alarm Turn off/on the flashing on the main display when alarms occurred.
  • Page 52 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 Table 3-5. Probe Parameters (1 of 4) IOB Parameter Name Unit Description Current oxygen concentration value (O2 %). The value should reflect the last good O2 value if it is in the “Lock” state during calibration. O2 Temp °C Current O2 sensor temperature.
  • Page 53 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Table 3-5. Probe Parameters (2 of 4) IOB Parameter Name Unit Description Maintenance 1 Alarm state: On/Off O2 Sensor Open, O2 T/C Open, O2 Temp Low, O2 Temp High, O2 T/C Shorted, O2 T/C Reversed, Heater Failure, Burner Flameout Alarm state: On/Off Maintenance 2...
  • Page 54 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 Table 3-5. Probe Parameters (3 of 4) TX IOB Parameter Name Unit Description Heater Latch Off Heater latch Off. (Parameter for Extended Temperature feature.) No = The heater will turn back on once the temperature falls below the heater set point Yes = The heater will not turn back on once the temperature falls below the heater set point...
  • Page 55 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 Table 3-5. Probe Parameters (4 of 4) TX IOB Parameter Name Unit Description mV/Dec Current calibration slope. This is the slope value that was calculated as a result Slope of the last successful calibration.

  • Page 56: Field Communicator Signal Line Connections

    When working at the 6888Xi, the 375/475 Field Communicator can be connected directly to test points TP21 and TP22 on the 6888Xi I/O Board as shown in Figure 3-5. The AM+ and AM- test points are provided to monitor the 4-20 mA signal without breaking into the loop.

  • Page 57: January

    Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 FIGURE 3-6. 375/475 Field Communicator 6888Xi Menu Tree (Sheet 1 of 4) !"#$"%#& ''''' (#"%)#*+,-,.+ ''''' -/012*-32456 !7*-893:;*!<5=<5 !7*.$" !7*>$" "-$%-?>#+ ''''' !=24908;*@:A2 B$!)#++*"-$%-?>#+ ''''' !CD;28*):8/285490:8 !7*,2E=2495<42 )233*%E=2A98/2 !7*)233 F!F*B$%@-$G*"->.#+...
  • Page 58 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 FIGURE 3-6. 375/475 Field Communicator 6888Xi Menu Tree (Sheet 2 of 4) !"#$%$&'() !"#$%$&'() !"#$%$&'() "*+,-./01 23+/345617/8 3+34*.5*/78/7 99999 *:540; *:5/0; *&<=&<50>$?' 3@>AB54'C'@ 0143D 99999 0143D5E 99999 /$F<53@>AB 4#G5*: ">@50'H#BB'$('(...
  • Page 59 Reference Manual Section 3: Configuration, Startup and Operation 00809-0100-4892 January 2019 FIGURE 3-6. 375/475 Field Communicator 6888Xi Menu Tree (Sheet 3 of 4) !"#$%$&'() *+,-."+/0112* 33333 42+,0* 33333 4"0.-+/42+,0* 33333 ,'56'78/49'6:7 ;<=9'(/49'6:7 ><=$:'$<$?'/49'6:7 4(@=7#6A/49'6:7 B+-."+/*040C* 33333 "C,,+D0 33333 B'@=?' ;4.2+B 33333 D-/>'E#6A/;<=9'(...
  • Page 60 Section 3: Configuration, Startup and Operation Reference Manual January 2019 00809-0100-4892 FIGURE 3-6. 375/475 Field Communicator 6888Xi Menu Tree (Sheet 3 of 4) !"#$%$&'() !"#$%$&'() *+,-+./01 2+3-2421 55555 60270,+64,0 55555 89:2;<=>&> 89:2;<=>&>:6=>' "?":2;<=>&> "?":2;<=>&>:6=>' .#;@(:2;<=>&>:6=>' .#;@(:2;<=>&>:6=>' *8/6+A0 55555 B';C'@:2;<=>&> B';C'@:2;<=>&>:6=>' "'DD:2;<=>&>...

  • Page 61: Test Gas Times

    January 2019 When using the 6888Xi with an SPS4001B or IMPS the test gas values for Gas 1 and Gas 2 corre- spond with Lo Gas and Hi Gas, respectively. Care must be taken to ensure the test gas values are properly matched and the test gases are plumbed correctly to the SPS4001B or IMPS.

  • Page 62: Output Tracking During Calibration

    Use a Field Communicator or the 6888Xi to set how the analog output value will function during calibration. A 6888Xi shipped from the factory has the output tracking set to No, i.e. the analog output will hold the last value during the calibration cycle. This same process must be performed any time an I/O Board is replaced.

  • Page 63: Tolerance Check

    When using the 6888Xi with an SPS4001B or IMPS the test gas values for Gas 1 and Gas 2 corre- spond with Lo Gas and Hi Gas, respectively. Care must be taken to ensure the test gas values are properly matched and the test gases are plumbed correctly to the SPS4001B or IMPS.
  • Page 64 3.7.5 Alarm Relay Output Configuration The 6888Xi has two dry contact Form-C alarm relay output signals that can be configured in multiple modes through the 6888Xi keypad display or the 375/475 Field Communicator. A list of modes is shown in Table 3-3. Each alarm relay output can be configured separately and one or all modes can be turned on in any combination.

  • Page 65: Analog Output Configuration

    The analog output signal from the 6888Xi can be configured for the 4-20 mA range and fault condition. A 6888Xi shipped from the factory has the analog outputs set to a 4 to 20 mA range with a 3.5 mA alarm level. This same process must be performed any time an I/O Board is replaced.

  • Page 66: Autocalibration

    2. Press MENU until the “System” menu appears. 3. Select CONFIGURE IOB. 4. Press the ENTER key to continue. 5. Select I/O BOARD 1. (Note: With a dual channel 6888XI, either or both I/O boards may be reset and reconfigured.) 6. Press the ENTER key to continue.

  • Page 67: Calibration Acknowledged Setup

    6. Press the RIGHT arrow key to edit. Use the stylus on the screen keypad to select YES or NO then press ENTER when finished. 7. Use the stylus on the screen to select SEND to update the 6888Xi. 3.7.8 Calibration Recommended The 6888Xi can be configured whether or not to annunciate a calibration recommended alarm.

  • Page 68: Plug Diffuser Diagnostic

    January 2019 00809-0100-4892 The 6888Xi can be configured whether or not to allow the user to not accept a calibration. A 6888Xi is shipped from the factory with the calibration acknowledged alarm disabled. This same process must be performed any time an I/O Board is replaced.

  • Page 69: Low Temperature Set Point

    Use a Field Communicator or the 6888Xi to configure the low temperature setpoint. The Low Temperature Set Point setups are only valid if the 6888Xi is configured with the Extended Temperature Enhanced Software Option. If the Option is not enabled in the 6888Xi, the setup selections will not appear in the menu.

  • Page 70: Calibration - General

    7. Press the RIGHT arrow key to edit the value. Use the RIGHT and LEFT arrow keys to select WARNING Failure to remove the 6888Xi from automatic control loops prior to performing this procedure may result in a dangerous operating condition.

  • Page 71: General

    January 2019 FIGURE 3-7. Calibration Methods, Simplified 8. Use the stylus on the screen to select SEND to update the 6888Xi. 9. From the SENSOR menu, select HIGH TEMP ALM SP. 10. Use the stylus on the screen keypad to tenter the high temperature alarm set point value.

  • Page 72: Calibration Procedure

    2. From the main menu, select CALIBRATION then press ENTER. 3. From the CALIBRATION menu, select O2 CALIBRATION then press ENTER. 4. In the first screen, a “Ctrl Loop to Manual” warning occurs. Remove the 6888XI from any automatic controls loops to avoid a potentially dangerous operating condition. Press ENTER when ready to start calibration.
  • Page 73 From the DIAGNOSTIC menu, select ACKNOWLEDGE ALARMS then press ENTER. e. From the ACKNOWLEDGE ALARMS menu, select ACK CALIBRATION then press ENTER. In this screen, a “Ctrl Loop to Manual” warning occurs. Remove the 6888XI from any automatic controls loops to avoid a potentially dangerous operating condition. Press ENTER when ready to continue.
  • Page 74 5. From the CALIBRATION menu, select O2 CALIBRATION. 6. In the first screen, a “Loop should be removed from automatic control” warning occurs. Remove the 6888Xi from any automatic controls loops to avoid a potentially dangerous operating condition. Press OK when ready.
  • Page 75 From the ACKNOWLEDGE menu, select ACK DIFFUSER WARNING. When the process is complete, the screen will return to the ACKNOWLEDGE menu. Aborting O Calibration with 6888Xi and Field Communicator 1. From the calibration prompt screen, press the OK button to return to the SELECT ACTION Configuration, Startup and Operation...

  • Page 76: Calibration Log

    3.8.4 Reset Calibration The 6888Xi has the ability to reset the current calibration and replace it with the previous. A cal- ibration may be reset in cases where the calibration was acknowledged in error or the calibra- Configuration, Startup and Operation...

  • Page 77: D/A Trim

    1 in the log into the calibration 0 position. The cell impedance and days WARNING Failure to remove the 6888Xi from automatic control loops prior to performing this procedure may result in a dangerous operating condition. since calibration remain unchanged.
  • Page 78 5. From the ANALOG OUTPUT menu, select TRIM mA OUTPUT. 6. In the first screen, a “Loop should be removed from automatic control” warning occurs. Remove the 6888Xi from any automatic controls loops to avoid a potentially dangerous operating condition. Press OK when ready.

  • Page 79: Section 4: Troubleshooting

    Reference Manual Section 4: Troubleshooting 00809-0100-4892 January 2019 Section 4: Troubleshooting Overview When the Zirconium Oxide sensing cell is heated to its setpoint [736 °C (1357 °F)], the cell will generate a voltage that represents the difference between the process O2% and the reference O2% inside the probe (20.95% O2 instrument or ambient air).

  • Page 80: General

    4.2.2 Electrical Noise The 6888Xi has been designed to operate in the type of environment normally found in a boiler room or control room. Noise suppression circuits are employed on all field terminations and main inputs. When fault finding, evaluate the electrical noise being generated in the immediate circuitry of a faulty system.

  • Page 81: Identifying And Correcting Fault Indications

    For correct operation, ensue the Distributed Control System is configured to interpret these signal levels correctly. Once an alarm condition is identified, the 6888Xi offers a number of diagnostics to interpret the specific alarm. Alarm indications are available via the 6888Xi or the 475 Field Communicator and Rosemount Analytical's Asset Management software.

  • Page 82: Calibration Passes, But Still Reads Incorrectly

    Section 4: Troubleshooting Reference Manual January 2019 00809-0100-4892 Table 4-2 - Diagnostic/Unit Alarm Fault Definitions (2 of 2) Self 4-20 mA Message Status Alert Critical Clearing Alarm The sensor heater temperature is above the high temperature threshold. If Extended Temperature feature is not enabled, the predefined high tempera- O2 Temp High ture threshold is 750 °C.
  • Page 83 Reference Manual Section 4: Troubleshooting 00809-0100-4892 January 2019 ture at the cell that is different than what is noted on the calibration gas bottles. Always set the calibration flow rate when a new diffuser is installed, and never readjust this flow rate until another new diffuser is installed.

  • Page 84: Probe Passes Calibration, O Still Reads Low

    As the diffuser plugs, this recovery time will get longer and longer. Use the Calibration Record provided to record and track Calibration Response times. The 6888Xi Advanced Electronics is available with enhanced software feature to automatically characterize the rate of diffuser pluggage during a calibration cycle.
  • Page 85 Reference Manual Section 4: Troubleshooting 00809-0100-4892 January 2019 Calibration Record For Rosemount Analytical In Situ O2 Probe Probe Serial Number: Probe Tag Number: Probe Location: Date Placed Into Service: Date Slope Constant Impedance Reponse Response initial final Notes: Responseinitial When the second calibration gas is turned off, note the number of seconds required for the O2 value to begin migrating back to the process value.
  • Page 86 Section 4: Troubleshooting Reference Manual January 2019 00809-0100-4892 Troubleshooting...

  • Page 87: Section 5: Maintenance And Service

    Section 3: Configuration, Startup and Operation. The 6888Xi offers a "calibration recommended" diagnostic that will indicate when the probe needs to be calibrated. Combustion processes that have a high level of ash or other particulate content will cause the diffusion element on the end of the probe to plug off.

  • Page 88: Calibration

    5.3.1 Automatic Calibration The 6888Xi can be used with the SPS 4001B or IMPS 4000 in order to perform an auto / semi- auto calibration. Refer to the SPS 4001B or IMPS 4000 Reference Manual for further details on how to configure and perform an automatic calibration.

  • Page 89: Replacement Parts

    Part replacement kits are available for each of the components discussed in this section. 6888Xi Component Replacement Each of the following procedures detail how to replace a specific component of the 6888Xi. Most of these procedures include component setup instructions that must be performed before returning the related O2 Probe to service.
  • Page 90 If the existing I/O Board has been operated with enhanced software features, these features must be acti- vated in the new board before the 6888Xi Electronics is put back into service. Failure to do so will cause a false analog output signal to the DCS.
  • Page 91 6888Xi Advanced Electronics Reference Manual Section 5: Maintenance and Service 00809-0100-4892 January 2019 FIGURE 5-4. I/O Board Wiring Connections FIGURE 5-5. I/O Board Flame Safety Interlock Wiring Maintenance and Service...
  • Page 92 6A00267604 Enhanced Software Option Upgrade, Diffuse Warning Function NOTE For enhanced software upgrades or to enable optional software features previously used in your 6888Xi con- figuration, contact Rosemount Analytical at 1-800-433-6076. NOTE The calibration parameters are stored in both the I/O Board and Transmitter Board. When the I/O Board is replaced, the calibration parameters must be either transferred from the Transmitter Board or the entire instrument must be recalibrated.

  • Page 93: Ac Relay Board Replacement

    WARNING Disconnect and lock out power before working on any electrical components. Use the procedure that follows to replace and set up the AC Relay board in the 6888Xi. Replacing an 6888Xi AC ReIay Board 1. Loosen the four screws securing the 6888Xi cover. The screws are captive and do not need to be completely removed.
  • Page 94 NOTE An AC Relay Board can only be added to single channel 6888Xi, i.e. only one I/O Board controlling one O2 Probe. The Flame Status Interlock function requires a contact closure on the digital input of the I/O Board to indicate a flame is present.

  • Page 95: Power Supply Board Replacement

    00809-0100-4892 January 2019 7. Partially slide the AC Relay Board into the left-most slot of the 6888Xi enclosure. The com- ponent side of the AC Relay board will be to the right with the fuse holder at the top. Ensure the board is correctly aligned within the slots in the enclosure.

  • Page 96: Front Panel Replacement

    00809-0100-4892 FIGURE 5-9. Power Supply Board Wiring 6. Hold the AC input wiring to the right and slide the Power Supply board out of the 6888Xi enclosure. 7. Install the new mounting bracket (9, Figure 5-1) on the new Power Supply board (10, Figure 5-1).
  • Page 97 5. Remove the wire hinge from the right side of the 6888Xi cover. A paper clip or similar device can be inserted into the hole on the left side of the cover to push the hinge out of the cover.

  • Page 98: Dr Board Replacement

    5.5.5 DR Board Replacement Use the procedure that follows to replace the DR board in the 6888Xi that is connected to a Direct Replacement probe. 1. Loosen the four screws securing the 6888Xi cover. The screws are captive and do not need to be completely removed.
  • Page 99 9. Refer to the wiring diagram in Figure 6-10. Reconnect the wiring to connector J4. 10. Connect the wiring harness plugs to connectors J1, J2, J3, and J8. 11. Slide the DR board completely into the 6888Xi enclosure. 12. Reapply power to the Remote Interface and Probe. When initialization is complete, the Probe will begin heating up, but an alarm condition will be shown.
  • Page 100 Section 5: Maintenance and Service Reference Manual January 2019 00809-0100-4892 Use the Up/Down keys to select “1-Get From Probe”. Press <ENTER> twice. vi. When transfer is complete, press <EXIT> twice to return to the main menu. FIGURE 5-11. DR Board Wiring, Left-Hand Side Maintenance and Service...

  • Page 101: Section 6: Replacement Parts

    *Note: If the existing I/O Board has been operated with the Stoichiometric enhanced software feature, this feature must be activated in the new board before the 6888Xi is put back into service. Failure to do so will cause a false analog output signal to the DCS.
  • Page 102 Section 6: Replacement Parts Reference Manual January 2019 00809-0100-4892 Replacement Parts...

  • Page 103: Section 7: Optional Accessories

    4-20 mA signal wires. By attaching the 375/475 Field Communicator at a termination point along the 4-20 mA signal line, a technician can diagnose problems and configure and calibrate the 6888Xi as if he or she were standing in front of the instrument.

  • Page 104: Sps 4001B Single Probe Autocalibration Sequencer

    4001B is fully enclosed in a NEMA cabinet suited for wall-mounting. This cabinet provides added protection against dust and minor impacts. The SPS 4001B works in conjunction with the 6888Xi, eliminating out-of-calibration occurrences and the need to send a technician to the installation site.

  • Page 105: Imps 4000 Intelligent Multiprobe Test Gas Sequencer

    Test Gas Sequencer The IMPS 4000 Intelligent Multiprobe Test Gas Sequencer is housed within an IP56 (NEMA 4X) enclosure and has the intelligence to provide calibration gas sequencing of up to four 6888Xi’s to accommodate automatic and semi-automatic calibration routines.

  • Page 106: Calibration Gas

    Rosemount Analytical's oxygen analyzers. These lightweight, disposable gas cylinders eliminate the need to rent gas bottles. For more information, call Rosemount Cutsomer Support at +1 855 724 2628 FIGURE 7-4. Calibration Gas Bottles Optional Accessories...

  • Page 107: Oxybalance Display And Averaging System

    Optional OxyBalance Display and Averaging System. Reviews up to eight 4-20 mA signals from individual probes. Trends individual outputs, calculates four programmable averages as addi- tional 4-20 mA outputs. For more information, call Rosemount Cutsomer Support at +1 855 724 2628 FIGURE 7-5. OxyBalance System Optional Accessories...

  • Page 108: Appendix A: Safety Data

    Appendix A: Safety Data Reference Manual January 2019 00809-0100-4892 Appendix A: Safety Data IMPORTANT SAFETY INSTRUCTIONS FOR THE WIRING AND INSTALLATION OF THIS APPARATUS The following safety instructions apply specifically to all EU member states. They should be strictly adhered to in order to assure compliance with the Low Voltage Directive. Non-EU states should also comply with the following unless superseded by local or National Standards.

  • Page 109: Appendix B: Return Of Material

    Appendix B: Return of Material Reference Manual January 2019 00809-0100-4892 Appendix B: Return of Material Returning Material SERVICE SUPPORT To expedite the return process outside of the United States, contact the nearest Emerson repre- sentative. Within the United States, call the Emerson Instrument and Valves Response Center using the 1-800-654-RSMT (7768) toll-free number.
  • Page 110 Appendix C: Product Certifications Reference Manual January 2019 00809-0100-4892 Appendix C: Product Certifications Certificate: FM17NUS0009X Standards: FM 3810:2005, ANSI/IEC:2003, ANSI/EC 60529:2004 Markings: Type 4X Special Conditions for Use: Mounting option 01 was not certified to provide Type 4X ingress protection through the panel cut-out opening.

  • Page 111: Appendix C: Eu Declaration Of Conformity

    Reference Manual Appendix D: EU Declaration of Conformity 00809-0100-4892 January 2019 Appendix D: EU Declaration of Conformity Appendix D...

  • Page 112: Appendix D: China Rohs Table

    Appendix E: China RoHS Table Reference Manual January 2019 00809-0100-4892 Appendix E: China RoHS Table Appendix E...
  • Page 114 The Emerson logo is a trademark and service mark of Emerson Electric Co. Chanhassen, MN 55317 Rosemount is a mark of one of the Emerson family of companies. All other marks are the property of their respective owners. Tel +1 800 999 9307...

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