Page 1 Manual 00809-0500-4881, Rev AB April 2023 Rosemount ™ OCX8800C Oxygen and Combustibles Analyzer for Hazardous Areas...
Page 2 The information contained in this document is subject to change without notice. NOTICE If a Field Communicator is used with this unit, the software within the Field Communicator may require modification. If a software modification is required, please contact your local Emerson Service Group or National Response Center at 1-800-654-7768. WARNING Physical access Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end users’...
Page 3 Product names used herein are for manufacturer or supplier identification only and may be trademarks/registered trademarks of these companies. Rosemount and the Rosemount logo are registered trademarks of Rosemount. The Emerson logo is a trademark and service mark of Emerson Electric Co.
Page 5: Table Of Contents
5.2 Field Communicator signal connections................69 5.3 Field Communicator PC connections..................71 ® 5.4 HART menu tree........................72 5.5 D/A trim procedures......................... 76 Chapter 6 Calibration..........................79 6.1 Overview.............................79 6.2 Fully automatic calibration.......................79 6.3 Operator-initiated autocalibration..................80 6.4 Manual calibration........................81 Chapter 7 Field Communicator....................... 87 7.1 Overview.............................87 7.2 Field Communicator connections....................87 Rosemount OCX8800C...
Page 6 8.7 Transducer block enumerations................... 116 8.8 Analog input (AI) function block....................123 8.9 Proportional/integral/derivative (PID) function block............140 8.10 Arithmetic (ARTHM) function block..................163 8.11 Advanced topics........................171 8.12 Input selector (ISEL) function block..................172 ™ 8.13 Operation with Emerson DeltaV ..................179 Chapter 9 Troubleshoot..........................181 9.1 Overview...........................181 9.2 Diagnostic alarms........................183 9.3 Fault isolation.......................... 183 9.4 Alarm relay events........................
Page 7: Description And Specifications
Check the model number of your Rosemount OCX8800 against the transmitter features and options, making sure options specified by this number are on or included with the unit. Use this complete model number for any correspondence with Emerson. Optional accessories provides a list of accessories for use with the Rosemount OCX8800.
Page 8 Figure 1-1: Typical System Package A. Quick Start Guide B. Adapter plate with mounting hardware and gasket C. Reference air and calibration set (optional) D. Blowback hardware (optional) E. Rosemount OCX8800 with remote electronics F. Rosemount OCX8800 with integral electronics Emerson.com/Rosemount...
Page 9: System Overview
1.2.2 System description Emerson has designed the Rosemount OCX8800 to measure oxygen and combustible concentrations in flue gas temperatures up to 2600 °F (1427 °C). Electrical connections, power, and communications are made through two ¾ national pipe thread (NPT) ports in the flameproof electronics enclosure using fittings and cables provided by the customer.
Page 10 1.2.4 System features 1. The O cell output voltage and sensitivity increase as the oxygen concentration decreases. 2. HART or F Fieldbus communication is standard. To use this capability, ® ™ OUNDATION you must have either: a. Field Communicator Emerson.com/Rosemount...
Page 11 Field Communicator: The handheld Field Communicator requires Device Description (DD) software specific to the Rosemount OCX8800. The DD software is supplied with many Field Communicators, but can also be programmed into existing Field Communicators at most Emerson service offices. Refer to Using HART communications for additional information.
Page 12 N. Instrument air solenoid O. Flow meter: 7 scfh P. Eductor air Q. Reference air R. Low O test gas S. High O test gas T. CO test gas U. Instrument air V. Flow meter: 50 cc/min. (0.1 scfh) W. Dilution air Emerson.com/Rosemount...
Page 13 185 °F (85 °C). Retain packaging in which the transmitter arrived from the factory in case any components are to be shipped to another site. This packaging haws been designed to protect the product. Rosemount OCX8800C...
Page 14 A. Rosemount OCX8800 with integral electronics B. Instrument air C. Three calibration lines by customer (300 ft. [91 m] maximum) D. Signal output (twisted pairs) E. Termination in control room F. Field Communicator G. Customer's laptop with AMS H. AMS Emerson.com/Rosemount...
Page 15 D. Instrument air supply (reference gas) E. High O test gas F. Low O test gas G. CO test gas H. Gases I. Duct J. Stack K. Test gas flow meter L. Dilution air flow meter M. Pressure regulator Rosemount OCX8800C...
Page 16 F. Test gas flow meter G. Dilution air flow meter H. 4-20 mA outputs (two twisted pairs) I. Line voltage J. Instrument air supply (reference gas) K. Pressure regulator L. High O test gas M. Low O test gas N. CO test gas Emerson.com/Rosemount...
Page 17 Manual Description and specifications 00809-0500-4881 April 2023 Figure 1-6: Optional Sample Tube Support C. 0.75-in. (19 mm) diameter on 7.5-in. (190 mm) diameter B.C., eight places D. 0.75-in. (19 mm) diameter on 4.75-in. (121 mm) diameter B.C., four places Rosemount OCX8800C...
Page 18 114.5 (2907) Figure 1-7: Optional In-Situ Filters A. In-situ stainless steel or Hastelloy filter B. In-situ high surface area stainless steel filter Figure 1-8: Optional Panel Mounted Blowback and Calibration/Reference Air Set (19- in. [482.6 mm] Rack or Wall Mount) Emerson.com/Rosemount...
Page 19: Specifications
-40 to 212 °F (-40 to 100 °C) ambient Electronics housing -40 to 149 °F (-40 to 65 °C), ambient -40 to 185 °F (-40 to 85 °C), internal operating temperature of electronics inside housing, as read by HART Fieldbus, or AMS software. ® ™ OUNDATION Rosemount OCX8800C...
Page 20 Ceramic: 2600 °F (1427 °C) Enclosures Low copper aluminum 1.3.9 Calibration Semi-automatic or automatic 1.3.10 Calibration gas mixtures recommended (reference test gas bottles kit #1A9919G04) 0.4 percent O , balance N 8 percent O , balance N 1000 ppm CO, balance air Emerson.com/Rosemount...
Page 21 Meets EN 61326, Class A 1.3.19 Line voltage Universal 100 to 240 Vac ±10 percent, 50 to 60 Hz, no switches or jumpers required, ¾-14 national pipe thread (NPT) conduit port 1.3.20 Pollution degree 1.3.21 Over voltage category Rosemount OCX8800C...
Page 22: Ordering Information
1.3.24 Alarm Alarm output relay - dry contact, form C, 30 mA, 30 Vdc capability 1.3.25 Power consumption 750 W maximum 1.4 Ordering information For ordering information, refer to the Rosemount OCX8800 Oxygen and Combustibles Transmitter Product Data Sheet. Emerson.com/Rosemount...
Page 23: Chapter 2 Install
Plug all unused ports on the probe housing and enclosure with a suitable filling. 2.1 Product safety WARNING Safety instructions Failure to follow the safety instructions could result in serious injury or death. Before installing this equipment, read Essential instructions. Rosemount OCX8800C...
Page 24: Mechanical Installation
Failure to connect the pneumatic lines can allow the flow of contaminants into the transmitter's ports. Whenever a positive stack pressure exists at the installation site, be sure to connect all pneumatic lines prior to installing the transmitter in the stack or ductwork. Emerson.com/Rosemount...
Page 25 B. Removal envelope (see Table 2-3). C. See Table 2-1. D. Flange diameter E. B.C. diameter F. Hole diameter G. See Table 2-2. H. Allow 9 in. (229 mm) for cover removal. I. Bottom view J. Optional in situ filter Rosemount OCX8800C...
Page 26 4. Ensure the conduits drop vertically from the transmitter and the conduit is routed below the level of the conduit ports on the housing to form a drip loop. Drip loops minimize the possibility that moisture will damage the electronics. Emerson.com/Rosemount...
Page 27 Figure 2-2: Installation with Drip Loops A. Duct wall B. Conduit drip loops 5. Where a positive stack pressure exists at the installation site, connect all pneumatic lines prior to installing the transmitter in the stack or ductwork. Rosemount OCX8800C...
Page 28: Electrical Installation
This circuit breaker should also include a mechanically operated isolating switch. If not, then another external means of disconnecting the supply from the equipment should be located close by. Circuit breakers or switches must comply with a recognized standard such as IEC 947. Emerson.com/Rosemount...
Page 29 OUNDATION a handheld communicator or AMS Device Manager software. The O signal is at the AOUT 1 terminals. 2.3.5 Combustibles equivalent (COe) 4-20 mA signal Another 4-20 mA signal at the AOUT 2 terminals represents the COe value. Rosemount OCX8800C...
Page 30 Remote electronics connections to sensor housing Make the following connections between the remote electronics and sensor housings with the electronics cable ordered with the package (Figure 2-3). Braided cable is available in lengths up to 150 ft (46 m). Emerson.com/Rosemount...
Page 31 C. COe sensor and cold junction connector (J4) D. O sensor and thermocouple connector (J5) E. Heater power cable F. Electronics housing G. Sensor housing H. Signal cable Table 2-5: J3 Connections Wire color Connects to Yellow 2 heater CO Rosemount OCX8800C...
Page 32 T/C sample block (SB) + Black T/C SB - Green T/C O Black T/C O Blue cell + Black cell - Note Interconnect wiring shown is for Rosemount supplied cables. For customer furnished interconnect wiring or cables, refer to Figure 2-4 Figure 2-5. Emerson.com/Rosemount...
Page 33 J. Heat shrink tubing 1-in. (25.4 mm) long, 3/16-in. (4.8 mm) size K. Typical on both ends of wiring L. 2.0 ± 0.25 typical M. For RFI/CE compliance, the connector must provide 360 degrees of electrical contact to the cable shield. Rosemount OCX8800C...
Page 34 Use the blue, white, orange, black, red, and yellow stranded wires in the heater power cable to connect power to the three heaters in the sensor housing. Match the wire colors to the corresponding heater power terminal blocks in the sensor and electronics housings. Emerson.com/Rosemount...
Page 35 E. Ground stud F. Earth ground typical for electronics and sensor housing G. Ground H. Customer wiring I. Terminal block J. EMI filter K. External tooth locks washer L. Signal port ¾ NPT M. Power port ¾ NPT Rosemount OCX8800C...
Page 36: Pneumatic Installation
Failure to use proper gases will result in erroneous readings. Do not use 100 percent nitrogen as an O low gas. Emerson recommends using O low gas between 0.4 percent and 2.0 percent O Do not use gases with hydrocarbon concentrations of more than 40 parts per million.
Page 37 When the reference air set and test gas solenoids are included with your transmitter, use the following procedure to install the pneumatic system components. Procedure 1. Install the reference air set according to the instructions in Reference air set option (only), Step 1 through Step 3. Rosemount OCX8800C...
Page 38 L. Pressure regulator/filter 35 psig (2.4 barg) for general purpose, 45 psig (3.1 barg) for hazardous areas M. 2-in. pressure gauge 0-60 psig (0 to 4.1 barg) N. Combination filter-reg. 0-60 psig (0 to 4.1 barg) O. Flow meter 1-10 scfh P. Flow meter 0.05-0.5 scfh Q. Calibration gas out Emerson.com/Rosemount...
Page 39 Reference air set and solenoids option with COe zero function Figure 2-9 shows the piping arrangement for the transmitter with autocalibration when the COe zero function is used. The arrangement is similar to Figure 2-8, except instrument air is used as the high O test gas. Rosemount OCX8800C...
Page 40 O. Flow meter, 1-10 scfh P. Flow meter, 0.05-0.5 scfh Q. Calibration gas out Note If instrument is to be used as the high O calibration gas, the low O and COe calibration gases must also be set to the same pressure. Emerson.com/Rosemount...
Page 41 Figure 2-10 shows the piping arrangement for the transmitter with the blowback and autocalibration options when COe zero function is used. The arrangement is similar to Figure 2-8 except instrument air is used as the high O test gas. Rosemount OCX8800C...
Page 42 R. 2-in. pressure gauge, 0 to 60 psig (0 to 4.1 barg) S. Combination filter/regulator, 0 to 60 psig (0 to 4.1 barg) T. Flow meter, 1-10 scfh U. Flow meter, 0.05-0.5 scfh V. Pneumatic actuator During blowback operation, states of both solenoid valves change. Emerson.com/Rosemount...
Page 43: Initial Start-Up
Upon completing installation, make sure that the transmitter is turned on and operating prior to firing up the combustion process. During outages, and whenever possible, leave the transmitter running to prevent condensation and premature aging from thermal cycling. Rosemount OCX8800C...
Page 44 Install Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 45: Configuration And Start-Up
All switches are accessible through holes in the electronics box. CAUTION Equipment damage If defaults are changed under power, damage to the electronics may occur. Remove power from the transmitter before changing defaults. Verify that the following switch settings are correct for your installation. Rosemount OCX8800C...
Page 46 O 4-20 mA signal to be internally powered. SW2: The two settings are internally or externally powering the COe 4-20 mA signal. The factory setting is for the COe 4-20 mA signal to be internally powered. Emerson.com/Rosemount...
Page 47 If defaults are changed under power, damage to the electronics may occur. Remove power from the transmitter before changing defaults. Figure 3-2: Rosemount OCX8800 Defaults - F Fieldbus Electronics OUNDATION A. Open B. Closed Switch default positions shown. Rosemount OCX8800C...
Page 48: Initial Power Up
HIGH GAS. Enter the percent O used for the high test gas. 5. From O CAL SETUP, select O LOW GAS. Enter the percent O used for the low test 6. From the TRANSDUCER menu, select COe CAL SETUP. Emerson.com/Rosemount...
Page 49: Reset
Remove the transmitter from the process loop and recycle power. 3.5 Calibration solenoids Emerson can provide the transmitter with optional calibration solenoids for autocalibration. The transmitter's software controls the solenoids, which automatically switch in the proper calibration gas during the calibration cycle.
Page 50: Blowback Feature
BlBk Intrvl: Length of time between blowback events (60 minutes recommended). • BlBk Period: Length of time blowback is activated (five seconds recommended). • BlBk Purge Time: Length of time after blowback is complete before oxygen / combustibles readings are considered valid (set as required by the application). Emerson.com/Rosemount...
Page 51: Calibration Verify Feature
Also set the following parameters: • Blow Bk Intrvl: Length of time between blowback events. Range is 0 to 32,000 minutes. Default is 60 minutes. Emerson recommends 60 minutes. • Blow Bk Period: Length of time blowback in activated. Range is one to five seconds.
Page 52 • Flow High COe Gas: Flows the COe test gas for the time specified in the calibration setup. • Purge gas: Intiates a delay for the specified purge time before oxygen/ combustibles readings are considered valid. Emerson.com/Rosemount...
Page 53: Calibration Tolerance Feature
4. To enable the calibration tolerance feature for the oxygen calibration, from the CAL PARAMS menu, select O Tol Check. Select On to enable the calibration tolerance feature. 5. Go back to the CAL SETUP menu and select COe CAL PARAMS. Rosemount OCX8800C...
Page 54: Coe Purge/Zero Feature
COe zero events. When the COe zero feature is used, special pneumatic connections are required. The COe zero feature is only valid if the transmitter is supplied with calibration solenoids and the solenoids have been activated. Emerson.com/Rosemount...
Page 55 Configure COe zero with the Field Communicator - Fieldbus ™ OUNDATION Procedure 1. Use the Field Communicator or AMS software to access the Fieldbus menu. 2. From the TRANSDUCER block menu, select COe ZERO. 3. From the COe ZERO menu, select the functions as follows: Rosemount OCX8800C...
Page 56 Valid choices are None, Both, COe, and O • COe Zero Update: Determines if the COe calibration constant is updated at the end of the function. Valid choices are Yes and No. A Yes choice will cause the COe calibration constant to update. Emerson.com/Rosemount...
Page 57: Using The Local Operator Interface (Loi)
4-1. There are four mating connectors on the back of the LOI module that allow the LOI to be oriented as desired. Figure 4-1: LOI components mounting A. Electronics housing (cover removed) B. Electronics stack C. LOI connector D. LOI board E. LOI module Rosemount OCX8800C...
Page 58: Local Operator Interface (Loi) Controls
O signal terminates via a Field Communicator. The transmitter also uses HART communications, permitting access to ® all instrument functionality anywhere the 4-20 mA signal terminates via a HART Field Communicator. Emerson.com/Rosemount...
Page 59 Use the blue (bottom left) key as a selector when choosing from among several menu items. This right-pointing key also will move the cursor to the right when entering the digits of a new parameter value. Rosemount OCX8800C...
Page 60 CAUTION Excessive dust can prevent the LOI from entering lockout. This condition can cause uncommanded operations to occur. Always clean dust and soil away from the LOI screen each time the LOI is used. Figure 4-3: Z Pattern Entry Emerson.com/Rosemount...
Page 61: Local Operator Interface (Loi) Menu Tree
Sensors are warming up to operating temperature. Warm-Up: The transmitter's heaters are ramping up to operating temperature. 4.3 Local operator interface (LOI) menu tree Figure 4-4 displays the LOI menu tree that is specific to the Rosemount OCX8800. Rosemount OCX8800C...
Page 62 Using the local operator interface (LOI) Manual April 2023 00809-0500-4881 Figure 4-4: LOI Menu Tree Emerson.com/Rosemount...
Page 63 Manual Using the local operator interface (LOI) 00809-0500-4881 April 2023 Rosemount OCX8800C...
Page 64 Using the local operator interface (LOI) Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 65 From the first column submenus, press Right to move the display into the second column submenus. Press Up and Down to move the display to the second column submenus of the first column submenu selected. Press Left to move the display back to the first column submenu. Rosemount OCX8800C...
Page 66: D/A Trim Procedures
The LOI displays a Meter at 20 mA prompt. 9. Press Right to select yes or no. Press Up and Down to change the selection. Then press Enter to input the response. If no, the process repeats from Step 8. Emerson.com/Rosemount...
Page 67 Enter to input the response. If no, the process repeats from Step 8. When the responses in Step 8 and Step 9are yes, the trim procedure is complete. Postrequisites Exit the LOI menu and return the control loop to automatic control. Rosemount OCX8800C...
Page 68 Using the local operator interface (LOI) Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 69: Chapter 5 Using Hart ® Communications
250 ohms or more, refer Method 1: For load resistance ≥ 250 ohms. For applications in which the signal line load is less than 250 ohms, refer to Method 2: For load resistance < 250 ohms. Rosemount OCX8800C...
Page 70 2. Use any wiring termination points in the analog output 4-20 mA signal line. 3. You can also connect the Field Communicator directly to the transmitter electronics board. The test points are provided to monitor the 4-20 mA signal without breaking into the loop. Emerson.com/Rosemount...
Page 71: Field Communicator Pc Connections
When powering up a disconnected (off-line) Field Communicator, the LCD displays the Main Menu. When powering up a connected (on-line) Field Communicator, the LCD displays the On-line Menu. Refer to the Field Communicator manual for detailed menu information. Rosemount OCX8800C...
Page 72: Hart ® Menu Tree
Using HART communications Manual ® April 2023 00809-0500-4881 5.4 HART menu tree ® Figure 5-2 provides a menu tree for the Field Communicator, which is specific to Rosemount OCX8800 applications. Figure 5-2: HART Menu Tree Emerson.com/Rosemount...
Page 73 Manual Using HART communications ® 00809-0500-4881 April 2023 Rosemount OCX8800C...
Page 74 Using HART communications Manual ® April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 75 Manual Using HART communications ® 00809-0500-4881 April 2023 Rosemount OCX8800C...
Page 76: D/A Trim Procedures
The Field Communicator displays Fld dev output 20.00 mA equal to reference meter? 11. Using Up or Down, select 1 Yes or 2 No and press ENTER. If No, the process repeats from Step 6. The Field Communicator displays NOTE: Loop may be returned to automatic control. Emerson.com/Rosemount...
Page 77 The Field Communicator displays Fld output 20.00 mA equal to reference meter? 12. Using Up or Down, select 1 Yes or 2 No. Press ENTER. If No, the process repeats from Step 9. The Field Communicator displays NOTE: Loop may be returned to automatic control. Rosemount OCX8800C...
Page 78 Using HART communications Manual ® April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 79: Chapter 6 Calibration
8. Press Down key to select O Next Cal. Enter the amount of time in hours until the next automatic calibration. Press Left three times to move back to the LOI operating display. Rosemount OCX8800C...
Page 80: Operator-Initiated Autocalibration
6.3.1 Autocalibrate using the optional local operator interface (LOI) To initiate a calibration using the LOI, perform the following steps on the LOI menu tree. Procedure 1. From the Calibration menu, press Right to select the Cal Control menu. Emerson.com/Rosemount...
Page 81: Manual Calibration
When the purge period expires, the LOI display reverts to the normal operation display. If the calibration failed, the display will indicate an alarm condition. 10. Press Right to start combustibles calibration. Turn on the CO test gas when prompted. 11. Press Right after applying the CO test gas. Rosemount OCX8800C...
Page 82 O LOW GAS parameter in the Setup window. Press OK when ready. 10. Select START/NEXT CALSTEP to start applying the O low gas. The time to apply the test gas is specified by the Gas Time. Emerson.com/Rosemount...
Page 83 6. Remove the transmitter from any automatic control loops to avoid a potentially dangerous operating condition and press OK. 7. Set the main Calibration screen to the following settings/values. Press OK to continue. • OCX: TAG NAME • STATUS: Idle Rosemount OCX8800C...
Page 84 Right key or use the number keypad to select the menu item number. To return to a preceding menu, press the Left key. Procedure 1. To calibrate from Fieldbus, first set the Transducer Block to Out of Service Mode (OOS). Emerson.com/Rosemount...
Page 85 O high gas/ combustibles test gas. Verify the O /COe concentration measured matches the O High Gas/COe Test Gas parameter in the setup. Press OK when ready. 12. Select Next Calibration Step to start applying the test gas. Rosemount OCX8800C...
Page 86 The time to purge gas is specified by the Purge Time. When the Purge step is complete, the Calibration Step will be at . The Idle alarm will be set if the calibration has failed. Calibration Failed 17. When calibration is complete, select Exit to exit the calibration method. Emerson.com/Rosemount...
Page 87: Chapter 7 Field Communicator
HART loop for the Field Communicator to function properly. WARNING EXPLOSION Explosions can result in death or serious injury. Do not make connections to the Field Communicator's serial port, digital signal line, or NiCad recharger jack in an explosive atmosphere. Rosemount OCX8800C...
Page 88 WARNING EXPLOSION Explosions can result in death or serious injury. Do not make connections to the Field Communicator's serial port, digital signal line, or NiCad recharger jack in an explosive atmosphere. Emerson.com/Rosemount...
Page 89 A. Terminal connectors B. Terminal block C. Terminals D. Field Communicator E. Lead set F. Fieldbus signal G. Fieldbus digital signal H. Fieldbus computer terminal (PC) I. Field Communicator rear panel Note Devices shown are not to scale. Rosemount OCX8800C...
Page 90: Fieldbus Menu Tree
Field Communicator Manual April 2023 00809-0500-4881 7.3 Fieldbus menu tree Figure 7-3 displays menu for the Field Communicator using the Fieldbus protocol. This menu is specific to the Hazardous Area Rosemount OCX8800 applications. Emerson.com/Rosemount...
Page 91 Manual Field Communicator 00809-0500-4881 April 2023 Refer to the Fieldbus parameter descriptions for the applicable range, units, and description for the Fieldbus menu parameters. Figure 7-3: Fieldbus Menu Tree Rosemount OCX8800C...
Page 92 Field Communicator Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 93 Manual Field Communicator 00809-0500-4881 April 2023 Rosemount OCX8800C...
Page 94 Field Communicator Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 95: Chapter 8 Foundation ™ Fieldbus
Fieldbus an enabling OUNDATION technology. Emerson offers a full range of products from field devices to the DeltaV scalable control system to allow an easy transition to Fieldbus technology. The Fieldbus retains the features of the 4-20 mA analog system, including standardized...
Page 96 Figure 8-1: Function Block Internal Structure A. Input events B. Execution control C. Output events D. Input parameter linkages E. Input snap F. Processing algorithm G. Output snap H. Output parameter linkages I. Status Emerson.com/Rosemount...
Page 97 In addition to function blocks, Fieldbus contains two other block types to support the function blocks. These are the resource block and the transducer block. The resource block contains the hardware specific characteristics associated with a device. Transducer blocks couple the function blocks to local input/output functions. Rosemount OCX8800C...
Page 98: Network Communication
8.2 Network communication Figure 8-2 illustrates a simple Fieldbus network consisting of a single segment (link). Figure 8-2: Single Link Fieldbus Network A. LAS (link active scheduler) B. Link master C. Fieldbus link D. Basic devices and/or LinkMaster devices Emerson.com/Rosemount...
Page 99: Rosemount Ocx8800 Function Blocks
Addresses 0 through 15 are reserved for group addressing and for use by the data link layer. For all Emerson Fieldbus devices, addresses 20 through 35 are available to the device. If there are two or more devices with the same address, the first device to start uses its programmed address.
Page 100: Resource Block
Sensor Heater Temperature Variance Maintenance Calibration Error Maintenance Calibration Recommended Advisory NV Memory Failure Failed NV Writes Deferred Advisory High Electronics Temperature Maintenance ADC Failure Failed Line Input Out of Range Advisory Inter Board Comm Failure Failed Simulate Active Advisory Emerson.com/Rosemount...
Page 101 The T/C Heater Alerts tab may display one of the following alarms: 1. O T/C Open 2. O T/C Shorted 3. O T/C Reversed 4. Comb T/C Open 5. Comb T/C Shorted 6. Comb T/C Reversed 7. S/B T/C Open Rosemount OCX8800C...
Page 102 Diagnose at the transmitter. Refer to Diagnostic alarms for details. Recommended actions 1. Check heater circuit for loose or broken connections. 2. Check thermocouple wiring. 3. Test or replace the heater. Emerson.com/Rosemount...
Page 103 Recommended actions 1. Allow the transmitter several minutes to reach proper temperature. 2. Check power supply. Calibration Error The Calibration Alerts tab may display the following alarms: 1. O Calibration Failed 2. Comb Calibration Failed 3. Calibration Warning Rosemount OCX8800C...
Page 104 Calibration data may be lost; recalibrate the transmitter. If the transmitter does not recover automatically, the memory may be faulty. Refer to Diagnostic alarms details. Recommended action At start-up, wait two minutes with power applied and then cycle power again or reset the transmitter. Emerson.com/Rosemount...
Page 105 The Device Alerts AMS tab or the transducer block may display one of the following alarms: 1. Line Frequency Error 2. Line Voltage Low 3. Line Voltage High This alert indicates that the line power to the transmitter is outside the proper operating limits. Rosemount OCX8800C...
Page 106 Selecting Fieldbus simulation enables both the Fieldbus function block simulation and PWA simulation. Selecting PWA simulation enables PWA simulation only. CAUTION When used improperly, the Simulate feature can alter, disable, or activate transmitter alarms. Do not use the PWA Simulate feature for normal operations. Emerson.com/Rosemount...
Page 107 6. To simulate PlantWeb alerts, use the Simulate PWA screens in the resource block. To simulate block alarms, use Simulate TB Temperature Sensor - Temperature Status, Simulate TB Temperature Status, or Simulate TB Calibration Device - FF Status in the transducer block. 7. Select Device Diagnostics to view the active PWA alarms. Rosemount OCX8800C...
Page 108: Configure Plantweb Alert (Pwa) Simulation With The Field Communicator
Input Failure: Set whenever there is a communication error between the Fieldbus card and the transmitter. • Simulation Active: Set whenever the Fieldbus Simulate switch is set to On at the Fieldbus card or the Software simulate option is enabled. Emerson.com/Rosemount...
Page 109: Transducer Block
See FF-891, Field Communicator PC connections. BLOWBACK_DURATION Seconds The amount of time the blowback solenoid will be BLOWBACK_ENABLED 0: No Enumerated Enables or disables the 1: Yes automatic blowback cycle. BLOWBACK_INTERVAL 0-32767 Minutes The time between blowback cycles. Rosemount OCX8800C...
Page 110 -99.0 to 99.0 The combustibles calibration constant. COMB_DELTA_RESISTANCE Ohms The raw value of the combustibles level input. This is the difference between the active and reference RTDs. COMB_FAILED_CONSTANT This is the constant value calculated from the last failed combustibles calculation. Emerson.com/Rosemount...
Page 111 COMB_SENSOR_CAL_DATE See FF-903, Section 3.3 COMB_SENSOR_EXCITATION Combustible reference current. COMB_SENSOR_TYPE See FF-903, Sections 3.3 and 4.3. COMB_SETPOINT ° C Combustibles heater temperature set point. Rosemount OCX8800C...
Page 112 0, 1, 2 The current step of the combustibles sensor zero cycle (0 = Idle, 1 = Flowing, 2 = Purging) COZERO_UPDATE 0: No Enumerated Indicates whether the 1: Yes combustibles calibration constants should be updated after combustibles sensor zero. Emerson.com/Rosemount...
Page 113 O2_CELL_IMPEDANCE Ohms The instantaneous impedance value for the O cell. O2_CONSTANT -20.0 to 20.0 The O calibration constant. O2_FAILED_SLOPE mV/Decade This is the slope value calculated from the last failed O calculation. O2_HTR_DUTYCYCLE heater duty cycle. Rosemount OCX8800C...
Page 114 Seconds The amount of time that the process variable will take to reach 90% of the actual process variable. O2_TEMP_MAX ° C The highest O temperature read since power on. O2_THERMOCOUPLE_INPUT The raw value of the O temperature input. Emerson.com/Rosemount...
Page 115 ST_REV See FF-891, Section 5.3. STATS_ATTEMPTS Total number of messages sent to the transducer a/d board. Rosemount OCX8800C...
Page 116: Transducer Block Enumerations
Idle Yes, calibration can also be initiated from internally generated events. Apply O low gas Yes, if parameter Solenoids Present is Flow O low gas Read O low gas Apply O high gas Yes, if parameter Solenoids Present is Emerson.com/Rosemount...
Page 117 If you do not want to wait to finish the already running procedure, you first have to cancel it before starting the new procedure. Table 8-6: Blowback State Enumerations BLOWBACK_STATE description Idle Blow Purge Rosemount OCX8800C...
Page 118 Power input error In COe zero Table 8-8: Operating Mode Enumerations Operating mode description POWER UP WARMUP STABILIZE NORMAL CALIBRATING CALVERIFY BLOWBACK COZERO ALARM SYS FAULT CAL RECOMMENDED Table 8-9: Sensor Housing Enumerations SENSOR_HOUSING_TYPE description TYPE 1 TYPE 2 TYPE 3 Emerson.com/Rosemount...
Page 119 VERIFY_STATE_STEP description Start flow high O Start flow low O Start flow high COe gas Purge gas No effect Table 8-13: COe Zero State Enumerations COZERO_STATE description Idle Flowing Purging Table 8-14: COe out Tracks Enumerations COZERO_OUTTRAK description None Rosemount OCX8800C...
Page 120 Sample block temperature low Mechanical failure Sample block temperature high Mechanical failure Sample block temperature very high Mechanical failure Sample block heater failure Mechanical failure Sample block heater ramp rate Electronics failure calibration failed Calibration error Combustibles calibration failed Calibration error Emerson.com/Rosemount...
Page 121 Table 8-17: Recommended Settings for the I/O Channel Assignments for the A/I Blocks Transducer LTYPE XD-Scale 0% XD-Scale Units OUT_SCALE OUT_SCALE Units block I/O 100% 100% channel value Direct Direct 1000 1000 Direct 1000 ° C 1000 ° C Direct 1000 ° C 1000 ° C Rosemount OCX8800C...
Page 122 Setting PWA_SIMULATE to ON also allows simulating transducer block status and checking the correct mapping onto the PlantWeb alert's FAILED_ACTIVE, MAINT_ACTIVE, and ADVISE_ACTIVE parameters. 8.7.6 Support transducer block errors • Out of service: Set whenever the transducer block actual mode is OOS. Emerson.com/Rosemount...
Page 123: Analog Input (Ai) Function Block
In Automatic mode, the block's output parameter (OUT) reflects the process variable (PV) value and status. In Manual mode, you can set OUT manually. The Manual mode is reflected on the output status. A discrete output (OUT_D) is Rosemount OCX8800C...
Page 124 Active status if the subcode has changed. BLOCK_ERR None This parameter reflects the error status associated with the hardware or software components associated with a block. It is a bit string, so that multiple errors may be shown. Emerson.com/Rosemount...
Page 125 (Direct), is converted linearly (Indirect), or is converted with the square root (Indirect Square Root). LO_ALM None The LO alarm data, which includes a value of the alarm, a timestamp of occurrence, and the state of the alarm. Rosemount OCX8800C...
Page 126 PV filter. It is the time required for a 63% value change in the IN value. SIMULATE None A group of data that containes the current transducer value and status, the simulated transducer value and status, and the enable/disable bit. Emerson.com/Rosemount...
Page 127 With simulation enabled, the actual measurement value has no impact on the OUT value or the status. Rosemount OCX8800C...
Page 128 Hi_Lim Lo_Lo_Lim Lo_Lim M. Access analog measurement N. Alarm detection O. Simulate P. Convert Q. Cutoff R. Filter S. Status calculation Note OUT = Block output value and status. OUT_D = Discrete output that signals a selected alarm condition. Emerson.com/Rosemount...
Page 129 You can set the signal conversion type with the Linearization Type (L_TYPE) parameter. You can view the converted signal (in percent of XD_SCALE) through the FIELD_VAL parameter. You can choose from direct, indirect, or indirect square root signal conversion with the L_TYPE parameter. Rosemount OCX8800C...
Page 130 Block configuration error: the selected channel carries a measurement that is incompatible with the engineering units selected in XD_SCALE, the L_TYPE parameter is not configured, or CHANNEL = zero. Link configuration error. Simulate active: Simulation is enabled, and the block is using a simulated value in its execution. Emerson.com/Rosemount...
Page 131 In order to avoid alarm chattering when the variable is oscillating around the alarm limit, an alarm hysteresis in percent of the PV span can be set using the ALARM_HYS parameter. The priority of each alarm is set in the following parameters: • HI_PRI Rosemount OCX8800C...
Page 132 OUT_D parameter. • OUT_D: Discrete output of the AI function block based on the detection of process alarm condition(s). This parameter may be linked to other function blocks that require a discrete input based on the detected alarm conditions. Emerson.com/Rosemount...
Page 133 Table 8-21 lists the appropriate configuration settings, and Figure 8-7 illustrates the correct function block configuration. Table 8-21: Analog Input Function Block Configuration for a Typical Temperature Transmitter Parameter Configured values L_TYPE Direct XD_SCALE Not used OUT_SCALE Not used Rosemount OCX8800C...
Page 134 The level measurement will be used to control the level of liquid in the tank. The maximum level at the tankis 16 ft. (4.9 m) The liquid in the tank has a density that makes the level correspond to a pressure of 7.0 psi (0.5 BarG) at the pressure tap (Figure 8-8). Emerson.com/Rosemount...
Page 135 Table 8-22: Analog Input Function Diagram for a Pressure Transmitter Used in Level Measurement (Situation #1) Parameter Configured values L_TYPE Indirect XD_SCALE 0 to 7 psi (0 to 0.5 BarG) OUT_SCALE 0 to 16 ft (0 to 4.9 m) Rosemount OCX8800C...
Page 136 D. Analog output function block Situation #2 The transmitter in situation #1 is installed below the tank in a position where the liquid column in the impulse line, when the tank is empty, is equivalent to 2.0 psi (0.1 BarG) (Figure 8-10). Emerson.com/Rosemount...
Page 137 The liquid flow in a line is to be measured using the differential pressure across an orifice plate in the line, and the flow measurement will be used in a flow control loop. Based on the orifice specification sheet, the differential pressure transmitter was calibrated for 0 Rosemount OCX8800C...
Page 138 Set CHANNEL to a valid value; do not leave it at the initial value of b) Set XD_SCALE.UNITS_INDX to match the units in the transducer block channel value. c) Set L_TYPE to Direct, Indirect, or Indirect Square Root; do not leave it at the initial value of Potential cause Resource block. Emerson.com/Rosemount...
Page 139 Scaling parameters are set incorrectly. Recommended action Set XD_SCALE.EU0 and EU100 to match that of the transducer block channel value. Cannot set HI_LIMIT, HI_HI_LIMIT, LO_LIMIT, or LO_LO LIMIT values Potential cause Limit values are outside the OUT_SCALE.EU0 and OUT_SCALE.EU100 values. Rosemount OCX8800C...
Page 140: Proportional/Integral/Derivative (Pid) Function Block
• OUT = The block output and status. The block supports two forms of the PID equation: Standard and Series. You can choose the appropriate equation using the FORM parameter. The standard ISA PID equation is the default selection. Emerson.com/Rosemount...
Page 141 Active status in the Status parameter. As soon as the Unreported status is cleared by the alert reporting task, another block alert may be reported without clearing the Active status if the subcode has changed. Rosemount OCX8800C...
Page 142 Active status in the Status parameter. As soon as the Unreported status is cleared by the alert reporting task, another block alert may be reported without clearing the active status if the subcode has changed. Emerson.com/Rosemount...
Page 143 The error (SP-PV) used to determine the control action. FF_ENABLE None Enables the use of feedforward calculations. FF_GAIN None The feedforward gain value. FF_VAL is multiplied by FF_GAIN before it can be added to the calculated control output. Rosemount OCX8800C...
Page 144 LO_LO_LIM EU of PV_SCALE The setting for the alarm limit used to detect the LO LO alarm condition. LO_LO_PRI None The priority of the LO LO alarm. Emerson.com/Rosemount...
Page 145 Used when mode is RCAS. RESET Seconds per repeat The integral action time constant. ROUT_IN EU of OUT_SCALE Target output and status that is provided by a supervisory host. Used when mode is ROUT. Rosemount OCX8800C...
Page 146 This data is not checked or processed by the block. ST_REV None The revision level of the static data associated with the function block. The revision value will be incremented each time a static parameter value in the block is changed. Emerson.com/Rosemount...
Page 147 2.0 degree of freedom PID. UGAMMA Percent Used to set disturbance rejection vs. tracking response action for a 2.0 degree of freedom PID. UPDATE_EVT None This alert is generated by any changes to the static data. Rosemount OCX8800C...
Page 148 J. Convert K. In L. Out 8.9.1 Setpoint selection and limiting The setpoint of the PID block is determined by the mode. You can configure the SP_HI_LIM and SP_LO_LIM parameters to limit the setpoint. In Cascade or RemoteCascade mode, the Emerson.com/Rosemount...
Page 149 Manual mode. When Track in Manual is False, you can override the tracking function when the block is in Manual mode. Activating the track function causes the block's actual mode to revert to Local Override. Rosemount OCX8800C...
Page 150 Set RESET to zero to configure the PID block to perform integral only control regardless of the STRUCTURE parameter selection. When RESET equals zero, the equation reduces to an integrator equation with a gain value applied to the error. Emerson.com/Rosemount...
Page 151 Link Configuration Error Simulate Active Local Override: The actual mode is LO. Device Fault State Set Device Needs Maintenance Soon Input Failure/Process Variable has Bad Status: The parameter linking to IN is indicating a Bad status. Output Failure Rosemount OCX8800C...
Page 152 The types of block errors for the AI block are defined in Block errors. Process alarm detection is based on the OUT value. You can configure the alarm limits of the following standard alarms: • High (HI_LIM) • High high (HI_HI_LIM) • Low (LO_LIM) • Low low (LO_LO_LIM) Emerson.com/Rosemount...
Page 153 The transmitter must be in Manual or Out of Service mode to set the status option. Note The AI block only supports the BAD if Limited option. Unsupported options are not grayed out; they appear on the screen in the same manner as supported options. Rosemount OCX8800C...
Page 154 To prevent the output from changing abruptly and upsetting the process, select the SP-PV Track in Man I/O option. This option automatically sets the loop to Manual if a input status is detected. While in Manual mode, you can manage control manually until a Good input status is reestablished. Emerson.com/Rosemount...
Page 155 The BKCAL_OUT of the AO block and the BKCAL_IN of the PID block communicate the status and quality of information being passed between the blocks. The status indication shows that communications is functioning, and the I/O is working properly. Figure 8-18 illustrates the correct function block configuration. Rosemount OCX8800C...
Page 156 (FF_SCALE), and a gain (FF_GAIN) is determined. Figure 8-19 illustrates the process instrumentation diagram, and Figure 8-20 illustrates the correct function block configuration. Figure 8-19: PID Function Block Feedforward Example A. Steam supply B. Steam heater C. Condensate Emerson.com/Rosemount...
Page 157 The temperature variation will later be sensed by TT101. The temperature controller modifies the valve position to compensate for the steam pressure change. The process is slow and causes variations in the product temperature. Figure 8-21 illustrates the process instrumentation diagram. Rosemount OCX8800C...
Page 158 BKCAL_OUT connections on the PID blocks are used to prevent controller windup on the master loop when the slave loop is in Manual or Automatic mode or it has reached an output constraint. Figure 8-22 illustrates the correct function block configuration. Emerson.com/Rosemount...
Page 159 If the instrument connected to the AI block fails, you can place the AI block in Manual mode and set the output to some nominal value for use in the Integrator function block. In this case, IN at the slave PID block is constant and prevents the integral term from increasing or decreasing. Rosemount OCX8800C...
Page 160 Refer to Table 8-27 to troubleshoot any problems that you may encounter. Table 8-27: Troubleshooting Symptom Possible causes Corrective action Mode will not leave OOS. 1. Target mode not set. 1. Set target mode to something other than OOS. Emerson.com/Rosemount...
Page 161 Invited. See the appropriate upstream block diagnostics for corrective action. Mode sheds from RCAS to AUTO. 1. Remote cascade value 1. Host system is not writing RCAS_IN with a quality and status of good within shed time (see 2 cascade below). Rosemount OCX8800C...
Page 162 Mode will not change to AUTO Potential cause Target mode not set. Recommended action Set target mode to something other than OOS. Potential cause The link is not configured; the status shows Not connected. Recommended action Configure the IN link to the block. Emerson.com/Rosemount...
Page 163: Arithmetic (Arthm) Function Block
Recommended action Increase the value. 8.10 Arithmetic (ARTHM) function block The arithmetic function block provides the ability to configure a range extension function for a primary input and applies the nine different arithmetic types as compensation to or Rosemount OCX8800C...
Page 164 BIAS None The bias value. BIAS_IN_1 None The bias value for IN_1. BIAS_IN_2 None The bias value for IN_2. BIAS_IN_3 None The bias value for IN_3. Emerson.com/Rosemount...
Page 165 The second analog input value and status. supplying block or source. IN_3 Determined by The third analog input value and status. supplying block or source. IN_LO None The value used for the input whenever IN is below range. Rosemount OCX8800C...
Page 166 The revision value will be incremented each time a static parameter value in the block is changed. TAG_DESC None The user description of the intended application of the block. UPDATE_EVT None This alert is generated by any changes to the static data. Emerson.com/Rosemount...
Page 167 Block Configuration Error: The BY_PASS parameter is not configured and is set to 0, the SP_HI_LIM is less than the SP_LO_LIM, or the OUT_HI_LIM is less than the OUT_LO_LIM. Link Configuration Error Simulate Active Local Override: The actual mode is LO. Rosemount OCX8800C...
Page 168 (such as diagnostics and system alerts). Alarm conditions of priority through are advisory alarms of increasing priority. 8-15 Alarm conditions of priority are critical alarms of increasing priority. Emerson.com/Rosemount...
Page 169 Different fluids over the same temperature range have different effects on level due to their thermal expansion coefficients. Vessel geometry also plays a major role. As the height of the vessel increases, the effect of thermal expansion becomes more apparent. Figure 8-26 shows the relative temperature effects on a level signal. Rosemount OCX8800C...
Page 170 Select the arithmetic type (ARITH_TYPE) of flow compensation - linear. This allows a ratio to be set up that increases the level indication at a block output for an increase in the tank temperature relative to ambient temperature. Emerson.com/Rosemount...
Page 171: Advanced Topics
8.11 Advanced topics 8.11.1 Arithmetic types The parameter ARITH_TYPE determines how PV and the compensation terms (t) are combined. You may select from nine commonly used math functions depected below. COMP_HI and COMP_LO are compensation limits. Rosemount OCX8800C...
Page 172: Input Selector (Isel) Function Block
8.12 Input selector (ISEL) function block The input selector (ISEL) function block can be used to select the first good, hot backup, maximum, minimum, or average of as many as four input values and place it at the output. Emerson.com/Rosemount...
Page 173 SELECTED = The selected channel number. • OUT = The block output and status. Figure 8-28 illustrates the internal components of the ISEL block. Table 8-30 lists the ISEL block parameters and their descriptions, units of measure, and index numbers. Rosemount OCX8800C...
Page 174 Overrides the algorithm to select 1 of the 4 inputs regardless of the selection type. EU of IN The block output value and status. OUT_UNITS None The engineering units of the output. Typically, all inputs have the same units, and the value is also the same. Emerson.com/Rosemount...
Page 175 A. Selection algorithm B. Out C. Selector 8.12.1 Block errors Table 8-31 lists the conditions reported in the BLOCK_ERR parameter. Table 8-31: Block Error Conditions Condition Condition name and description number Other: The output has a quality of Uncertain. Rosemount OCX8800C...
Page 176 Priority number Priority description The priority of an alarm condition changes to after the condition that caused the alarm is corrected. An alarm condition with a priority of is recognized by the system, but is not reported to the operator. Emerson.com/Rosemount...
Page 177 • Uncertain if in Manual mode: The status of the Output is set to Uncertain when the mode is set to Manual. CAUTION Set the system in Manual or Out of Service mode to set the Status option. Rosemount OCX8800C...
Page 178 Figure 8-30: Input Selector Function Block Application Example (SEL_TYPE = max) A. Input selector (ISEL) function block B. To another function block Figure 8-31: Input Selector Function Block Application Example (SEL_TYPE = avg) A. Input selector (ISEL) function block B. To another function block Emerson.com/Rosemount...
Page 179: Operation With Emerson Deltav
Good Good Good Good 8.12.7 Troubleshoot 8.13 Operation with Emerson DeltaV ™ 8.13.1 Install a new device onto a DeltaV system ™ AMS and DeltaV software allows you to manage your instrumentation and to perform on-line configurations of your instruments.
Page 180 The files are probably on a floppy disk or a CD-ROM that accompanies your device. On CD-ROMs delivered together with Emerson transmitters the files are located in the directory /Fieldbus. Dependent on the existing system, use the files of the appropriate subdirectory.
Page 181: Chapter 9 Troubleshoot
9.1.2 Electrical noise Emerson designed the analyzer to operate in an 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 182 Figure 9-1: Fuse Locations A. F6 Neutral (N) 10 Amp, 250 Vac B. F1 Line (L1) 10 Amp, 250 Vac C. F3 and COe heater 4 Amp, 250 Vac D. F4 Sample block heater 8 Amp, 250 Vac Emerson.com/Rosemount...
Page 183: Diagnostic Alarms
The potential causes are listed in order of most probable to least probable. Starting with the most probable cause, inspect and test the transmitter to isolate the actual cause; then use the recommended corrective action listed to correct the problem. Rosemount OCX8800C...
Page 184 C. COe sensor and cold junction connector (J4) D. O sensor and thermocouple connector (J5) E. Heater power cable F. Electronics housing G. Sensor housing H. Signal cable Table 9-1: J3 Connections Wire color Connects to Yellow 2 heater CO Emerson.com/Rosemount...
Page 185 Cold junction connector (CJC)+ Black CJC- Black Execute- Table 9-3: J5 Connections Wire color Connects to Thermocouple (T/C) CO+ Black T/C CO- White T/C sample block (SB)+ Black T/C SB- Green T/C O Black T/C O Blue cell+ Black cell- Rosemount OCX8800C...
Page 186 Troubleshoot Manual April 2023 00809-0500-4881 Figure 9-3: Oxygen and Cell Output A. Oxygen concentration (percentage) B. Transmitter output (millivolt) 9.3.1 Sensor R High or O Sensor Open Oxygen sensor resistance high, > 5000 ohms or oxygen sensor disconnected. Emerson.com/Rosemount...
Page 187 Potential cause COe sensor failed. Recommended actions 1. Check resistance of both COe sensor elements per Figure 10-18. 2. Replace COe sensor if resistance of sensor element is not between 100 and 250 ohms. Potential cause CJC sensor grounded. Rosemount OCX8800C...
Page 188 Sample block heater temperature high, > 374 °F (190 °C). Potential cause High noise in Rosemount OCX8800 power supply. Recommended actions 1. Check power supply for line noise or voltage fluctuations. 2. Install power line filter kit (PN 6A00171G01) or high quality line filter for input power. Emerson.com/Rosemount...
Page 189 Reset to continue operation. Potential cause Incorrect COe thermocouple wiring. Recommended actions 1. Check COe thermocouple wiring per Figure 9-2 Figure 10-18. 2. Check the wiring at the thermocouple and inside the electronics housing. 3. Correct wiring fault. Rosemount OCX8800C...
Page 190 3. Perform procedure in Reset to continue operation. 9.3.10 COe TC Open Combustibles sensor heater thermocouple open. Potential cause Combustibles sensor thermocouple open. Recommended actions 1. Check thermocouple resistance (lead to ground) of reference and active thermocouples per Figure 9-2 Figure 10-19. Emerson.com/Rosemount...
Page 191 1. Check thermocouple resistance (lead to ground) of reference and active thermocouples per Figure 9-2 Figure 10-18. 2. If either thermocouple is open or shorted to ground, replace combustibles sensor. Potential cause Slow heat up during cold start. Rosemount OCX8800C...
Page 192 3. Correct reversed-wires fault. 4. Perform Reset to continue operation. 9.3.17 SB TC Reversed Sample block heater thermocouple reversed. Potential cause Sample block thermocouple wires reversed. Recommended actions 1. Check sample block thermocouple wiring per Figure 9-2 Figure 10-17. Emerson.com/Rosemount...
Page 193 Recommended actions Check heater fuse F3 in electronics housing per Figure 9-1. • If open, locate and correct cause of overload. • If F3 is not open or if cause of overload cannot be found, replace electronics package. Rosemount OCX8800C...
Page 194 1. Check resistance of sample block heater per Figure 10-17. Normal sample block heater resistance is 36.4 Ohms each (18.2 Ohms with both heaters in parallel). 2. Replace sample block heater if heater is open or has a large resistance. Emerson.com/Rosemount...
Page 195 If cell impedance is greater than 5000 Ohms and no ground fault is indicated, replace O cell. Potential cause constant error (constant not between -20 mV and +20 mV). Recommended actions 1. Flow calibration gas to the O cell. 2. Read the cell millivolt output. Rosemount OCX8800C...
Page 196 9.3.24 EEPRM Chksm Fail Alert Non-volatile parameter storage corrupted. Potential cause Transmitter powered down during calibration parameter storage. Recommended actions 1. Perform Reset. 2. Recalibrate the transmitter and check/trim analog outputs. Potential cause Flash PROM failure. Emerson.com/Rosemount...
Page 197 Sample block heater temperature low, < 302 °F (150 °C). Potential cause Sensor housing exposed to high wind and/or extreme cold temperatures. Recommended action Install sensor housing flange insulator (PN 6P00162H01). Potential cause High noise or voltage fluctuations in power supply. Rosemount OCX8800C...
Page 198 2. Install filter power line kit (PN 6A00171G01) or high quality line filter for input power. Potential cause Electronics package failure. Recommended actions 1. Check power supply voltage and compare with line voltage. 2. Replace electronics package if they do not agree within five percent. Emerson.com/Rosemount...
Page 199 2. Install filter power line kit (PN 6A00171G01) or high quality line filter for input power. Potential cause Electronics package failure. Recommended action Replace electronics package. 9.3.32 Out Brd Failure Output board failure Potential cause Electronics package failure. Recommended action Replace electronics package. Rosemount OCX8800C...
Page 200: Alarm Relay Events
RTD excitation current error (Ref curr Err) Power input error AC power line frequency out of usable range (Line Freq Error) AC power line voltage below minimum (Line Voltage Low) AC power line voltage above maximum (Line Voltage Hi) All alarms Any alarm Emerson.com/Rosemount...
Page 201: Maintenance And Service
1. Turn off power to the system. 2. Shut off the test gases at the cylinders and shut off the instrument air. 3. Disconnect the test gas and instrument air lines from the electronics housing as shown in Figure 10-1. Rosemount OCX8800C...
Page 202 Before removing the cover from the sensor or electronics housing, allow at least 45 minutes to pass after disconnecting power. 4. Remove the cover from the electronics housing to expose the electronics housing and terminal blocks, Figure 10-2. Emerson.com/Rosemount...
Page 203 6. Disconnect and remove the O and COe signal leads from the 4-20 mA signal output terminal block. 7. If used, disconnect and remove the external relay leads from the alarm output relay terminal block. Rosemount OCX8800C...
Page 204 9. Install the cover on the electronics housing. 10. Restore power to the system. Allow the transmitter to reach normal operating temperature before installing it in a hot process stack. 11. Turn on the test gases at the cylinders and open the instrument air supply valve. Emerson.com/Rosemount...
Page 205 1. Turn off power to the system. 2. Shut off the test gases at the cylinders and close the instrument air valve. 3. Disconnect the calibration gas, reference air, eductor air, and dilution air lines from the sensor housing, Figure 10-3. Rosemount OCX8800C...
Page 206 F. Instrument air (reference gas) G. High O test gas H. Low O test gas I. CO test gas J. Electronics housing K. Duct L. Stack 4. Remove the cover from the sensor housing to expose the sensor housing terminal blocks, Figure 10-4. Emerson.com/Rosemount...
Page 207 Figure 10-4: Sensor Housing Terminals A. Heater power cable B. Signal cable C. Sensor housing D. To ground screw Note Wire colors shown are for cables provided by Emerson. Table 10-1: Sensor Housing Terminal Connections Wire color Connects to Black Thermocouple (T/C) O...
Page 208 6. Refer to Figure 10-3 and make sure all test gas lines and electrical connectors are complete. 7. Install the sensor housing cover. 8. Restore power to the system. Allow the transmitter to reach normal operating temperature. Emerson.com/Rosemount...
Page 209 2. Shut off the test gases at the cylinders and close the instrument air supply valve, Figure 10-3. 3. Disconnect the test gas and instrument air lines from the remote electronics housing. 4. Remove the cover from the electronics housing to expose the electronics housing terminal blocks, Figure 10-5. Rosemount OCX8800C...
Page 210 5. Disconnect and remove the power leads from the AC power input terminal block. Remove the ground lead from the ground stud. 6. Disconnect and remove the O and COe signal leads from the alarm output relay terminal block. Emerson.com/Rosemount...
Page 211 D. Electronics housing E. O cell and thermocouple connector (J5) F. Signal cable G. Heater power cable Note Wire colors shown are for cables supplied by Emerson. Table 10-2: J3 Connections Wire color Connects to Yellow 2 heater CO Rosemount OCX8800C...
Page 212 10. If moving the electronics housing to another work site, disconnect and remove the power and signal cables and customer wiring conduits from the housing. 11. Remove the remote electronics housing from its mounting and move it to a suitable work area. Emerson.com/Rosemount...
Page 213 2. Clamp flats of sensor holder (E) in vise jaws with the pre-heater port pointing up. 3. Install and tighten the pre-heater (B). Align the pre-heater to the flat of the sensor holder (E) as shown in Figure 10-8. Rosemount OCX8800C...
Page 214 Maintenance and service Manual April 2023 00809-0500-4881 Figure 10-7: Thermocouple Emerson.com/Rosemount...
Page 215 6. Lubricate and install the COe sensor gasket (F). Apply anti-seize compound to threads of screws. 7. Install COe sensor holder (A), lockwashers (I), and screws (J). Rotate flat of COe sensor (A) to center of sensor holder (E). Rosemount OCX8800C...
Page 216 10-17) must be removed from sensor housing before you install the eductor. Procedure 1. Apply pipe thread sealant (Loctite #567) to the external pipe threads of the eductor Figure 10-9). Do not apply sealant to the first turn of the pipe threads. Emerson.com/Rosemount...
Page 217 I. COe sensor assembly J. Sensor holder K. Heater insulator L. COe thermocouple M. COe band heater N. Eductor elbow O. Eductor holder P. Sensor housing 2. Install and tighten the eductor (G) in the eductor holder (O). Rosemount OCX8800C...
Page 218 4. Apply anti-seize component to the external pipe threads of eductor holder (O). 5. Install and tighten eductor holder (O) in sensor housing (P). Align eductor with matchmark, as shown in Figure 10-10. Figure 10-10: Eductor Alignment Matchmarks A. Eductor flat B. Straight edge C. Matchmark Emerson.com/Rosemount...
Page 219 Manual Maintenance and service 00809-0500-4881 April 2023 Install COe sensor assembly Figure 10-11: Band Heater Height A. COe sensor B. Insulator C. Band heater Rosemount OCX8800C...
Page 220 Do not allow the eductor elbow to turn. 4. Tighten the sensor holder to align outside flat with matchmark on sensor housing flange, as shown in Figure 10-12. Figure 10-12: COe Sensor Holder Alignment A. Sensor holder flat B. Matchmark C. Straight edge D. Matchmark Emerson.com/Rosemount...
Page 221 The heater insulator end joint must line up with the band gap of the COe band heater. 10. Reconnect the COe sensor, thermocouple, and heater wires at the sensor housing terminal blocks. Refer to Figure 10-13. Rosemount OCX8800C...
Page 222 R. Heater O 11. Install and fasten the COe insulator (Figure 10-9) around the COe sensor assembly. All wiring must remain outside of the insulator. 12. If terminal block mounting (Figure 10-9) was moved, reinstall it with two base mounting screws. Emerson.com/Rosemount...
Page 223 J. Marking plate K. Thermal switch L. Heater clamp M. Gasket N. Screw O. Insulator P. Heater strut assembly Procedure 1. Before installing sample block heater rods, evenly coat the heater rods with Watlube heater release agent. Figure 10-14. Rosemount OCX8800C...
Page 224 2. If thermal switch (K) was removed, install thermal switch on mating heater clamp (L), connect wires of heater rods (E), and install insulator (I). 3. Install the heater rods, heater clamps, and screws. 4. Reconnect the heater rod leads at the housing terminal blocks. Emerson.com/Rosemount...
Page 225 H. Thermal switch I. Sensor housing terminals J. Green K. Orange L. Red M. Yellow N. Thermocouple O O. Thermocouple CO P. Thermocouple sample block Q. CO reference R. Heater sample block S. Heater CO T. Heater O Rosemount OCX8800C...
Page 226 10-22) or plug ¼ NPT sample inlet port. Capped or plugged ports must be air tight. 2. If not in place, install exhaust tube (B, Figure 10-22) in exhaust port according to instructions provided. 3. Connect a calibrated manometer to the CAL GAS inlet port. Emerson.com/Rosemount...
Page 227: Repair Sensor Housing
Disassemble the transmitter only as needed to replace damaged components. Use the applicable assembly procedures to install replacement parts and reassemble the transmitter. 10.3.1 Disassemble sensor housing Remove cover and terminals insulator Refer to Figure 10-16 Rosemount OCX8800C...
Page 228 F. Sensor housing G. Locking clip H. Screw I. Marking plate J. Thermal switch K. Heater clamp L. Screw M. Insulator N. Gasket O. Heater strut assembly Procedure 1. Loosen screw and slide locking clip away from cover. Retighten screw. Emerson.com/Rosemount...
Page 229 Refer to Figure 10-17. Procedure 1. Remove reference air tube from sensor housing. 2. See Figure 10-17. Disconnect and tag O heater wires, O cell and return wires, and thermocouple wires at the sensor housing terminals. Rosemount OCX8800C...
Page 230 N. Thermocouple O O. Thermocouple CO P. Thermocouple sample block Q. CO reference R. Heater sample block S. Heater CO T. Heater O 3. Remove the O cell and heater strut assembly from sensor housing. Remove and discard gasket. Emerson.com/Rosemount...
Page 231 4. To replace thermal switch, remove insulator. Disconnect heater wires. Unscrew and remove thermal switch. Remove COe sensor assembly Procedure 1. Disconnect the COe heater, thermocouple, and sensor wires from the terminal blocks. Refer to Figure 10-18. Rosemount OCX8800C...
Page 232 G. CJC sensor H. Red I. Yellow J. Blue K. White L. Thermocouple O M. Thermocouple CO N. Thermocouple sample block O. CO reference P. Heater sample block Q. Heater CO R. Heater O 2. Remove insulator (A, Figure 10-19). Emerson.com/Rosemount...
Page 233 (F) and move the terminal block mounting assembly out of the way. 3. Remove tubes (B, C, and D) from the COe sensor assembly (I), eductor fittings (N and H), and sensor housing (P). 4. Unfasten bayonet connector of COe thermocouple (L) and remove thermocouple. Rosemount OCX8800C...
Page 234 10-19) and one wrench on flats of sensor holder (J), unthread and remove the COe sensor assembly (I). Do not allow the eductor elbow to turn. 8. Slide the band heater (M) and heater insulator (K) from the sensor holder (J). Emerson.com/Rosemount...
Page 235 A. Eductor flat B. Straight edge C. Matchmark 2. Unscrew the terminal block mounting ( Figure 10-19). Move the terminal block mounting away from the eductor. 3. Unscrew the eductor holder with eductor and fittings from the sensor housing. Rosemount OCX8800C...
Page 236 Remove sample and exhaust tubes WARNING Burns The tubes are bonded with a thread sealing compound. The compound softens at 450 °F (232 °C). The heated parts can cause severe burns. Use heat resistant gloves when removing the probe or exhaust tube. Emerson.com/Rosemount...
Page 237 3. While heating the tube, use a pipe wrench to apply removal torque to the part being removed. Apply torque until the pipe thread sealant softens. Remove and discard the used sample tube (C), exhaust tube (B), or in-situ filter (D). Rosemount OCX8800C...
Page 238 Refer to the applicable material safety data sheet (MSDS) for solvent handling precautions. Diassemble O cell and heater strut assembly CAUTION Equipment damage Removing the O cell may damage the cell and platinum pad. Do not remove the O cell unless you are certain it needs to be replaced. Emerson.com/Rosemount...
Page 239 Cell, Heater, and Thermocouple Assembly, Exploded View A. Contact/thermocouple assembly B. Screw C. Lockwasher D. Return wire E. Heater strut assembly F. Strut bracket G. Spring H. Spring clip I. Heater tube J. Gasket K. Test gas passage holes L. O cell M. Screw Rosemount OCX8800C...
Page 240 (F), spring (G), and spring clip (H) until the spring clip reaches the pencil mark. Disassemble COe sensor assembly Procedure 1. Carefully remove screws (I, Figure 10-24), lockwashers (H), and COe sensor (A) from the sensor holder (E). Remove and discard the gasket (F). Emerson.com/Rosemount...
Page 241 Manual Maintenance and service 00809-0500-4881 April 2023 Figure 10-24: COe Sensor, Exploded View A. COe sensor B. Pre-heater C. Stainless steel balls D. Plug E. Sensor holder F. Gasket G. Thermocouple adapter H. Lockwasher I. Screw Rosemount OCX8800C...
Page 242 1. If the you removed the pre-heater (B, Figure 10-24), apply pipe thread sealant (Loctite #567) to the external pipe threads of the pre-heater (B) and plug (D). Do not apply sealant to the first turn of the pipe threads. Emerson.com/Rosemount...
Page 243 2. Clamp flats of sensor holder (E) in vise jaws with the pre-heater port pointing up. 3. Install and tighten the pre-heater (B). Align the pre-heater to the flat of the sensor holder (E) as shown in Figure 10-26. Figure 10-25: Thermocouple Rosemount OCX8800C...
Page 244 6. Lubricate and install the COe sensor gasket (F). Apply anti-seize compound to threads of screws. 7. Install COe sensor holder (A), lockwashers (I), and screws (J). Rotate flat of COe sensor (A) to center of sensor holder (E). Emerson.com/Rosemount...
Page 245 Do not apply sealant to the first turn of the pipe threads. 2. Thread the sample tube (C) or exhaust tube (B) into the housing. Use a pipe wrench to tighten the tube. 3. If used, install and tighten the in-situ filter (D). Rosemount OCX8800C...
Page 246 Maintenance and service Manual April 2023 00809-0500-4881 Install COe sensor assembly Figure 10-27: Band Heater Height A. COe sensor B. Insulator C. Band heater Emerson.com/Rosemount...
Page 247 Do not allow the eductor elbow to turn. 4. Tighten the sensor holder to align outside flat with matchmark on sensor housing flange, as shown in Figure 10-28. Figure 10-28: COe Sensor Holder Alignment A. Sensor holder flat B. Matchmark C. Straight edge D. Matchmark Rosemount OCX8800C...
Page 248 The heater insulator end joint must line up with the band gap of the COe band heater. 10. Reconnect the COe sensor, thermocouple, and heater wires at the sensor housing terminal blocks. Refer to Figure 10-29. Emerson.com/Rosemount...
Page 249 11. Install and fasten the COe insulator (Figure 10-9) around the COe sensor assembly. All wiring must remain outside of the insulator. 12. If terminal block mounting (Figure 10-9) was moved, reinstall it with two base mounting screws. Rosemount OCX8800C...
Page 250 J. Marking plate K. Thermal switch L. Heater clamp M. Gasket N. Screw O. Insulator P. Heater strut assembly Procedure 1. Before installing sample block heater rods, evenly coat the heater rods with Watlube heater release agent. Figure 10-30. Emerson.com/Rosemount...
Page 251 2. If thermal switch (K) was removed, install thermal switch on mating heater clamp (L), connect wires of heater rods (E), and install insulator (I). 3. Install the heater rods, heater clamps, and screws. 4. Reconnect the heater rod leads at the housing terminal blocks. Rosemount OCX8800C...
Page 252 G. Sample block heater rods H. Thermal switch I. Sensor housing terminals J. Green K. Orange L. Red M. Yellow N. Thermocouple O O. Thermocouple CO P. Thermocouple sample block Q. CO reference R. Heater sample block S. Heater CO T. Heater O Emerson.com/Rosemount...
Page 253 10-22) or plug ¼ NPT sample inlet port. Capped or plugged ports must be air tight. 2. If not in place, install exhaust tube (B, Figure 10-22) in exhaust port according to instructions provided. 3. Connect a calibrated manometer to the CAL GAS inlet port. Rosemount OCX8800C...
Page 254: Repair Electronics Housing
10.4.1 Disassemble electronics housing Remove cover Procedure 1. See Figure 10-32. Loosen screw (L) and slide locking clip (K) away from cover (A). Retighten screw (L). Emerson.com/Rosemount...
Page 255 D. Local operator interface (LOI) module E. Screw F. LOI board G. Screw H. Lockwasher I. Solenoid valve (three-way) J. Solenoid valve K. Locking clip L. Screw M. O-ring N. Electronics stack O. Flash PROM P. LOI connector Rosemount OCX8800C...
Page 256 2. Remove top nut of solenoid valve (I or J, Figure 10-32). 3. Remove the solenoid coil assembly and washer. 4. Unthread and remove solenoid valve base. Remove EMI filter and terminal block Procedure 1. Disconnect EMI filter wiring (Figure 10-33) at terminal block (F). Emerson.com/Rosemount...
Page 257 10-33) and/or terminal block (F) on electronic stack. 2. Refer to wiring details in Figure 10-33. Connect EMI filter and ground wire (E) at terminal block (F). 3. Connect EMI filter wiring at AC power input terminal block on electronic stack. Rosemount OCX8800C...
Page 258 2. Install new solenoid valve base. Be careful not to overtighten. 3. Install new washer and solenoid coil assembly and secure with nut. 4. Connect the solenoid leads to the proper terminations on the solenoid power terminal block (Figure 10-34). Emerson.com/Rosemount...
Page 259 Install electronics stack Procedure 1. Install electronics stack (N, Figure 10-32) and secure with lockwashers (H) and screws (G). 2. See Figure 10-34 Figure 10-35. Reconnect power cable, signal cable, and solenoid lead connectors to electronics stack terminals. Rosemount OCX8800C...
Page 260 C. COe and CJC connector (J4) D. O cell and thermocouple connector (J5) E. Signal cable F. Heater cable Note Wire colors shown are for cables supplied by Emerson. Table 10-5: J3 Connections Wire color Connects to Yellow 2 heater CO...
Page 261 10-32) and secure it with two screws (G) and lockwashers (H). 2. Note the location of the LOI connector (P). Plug LOI module (D) and connector into one of the four mating receptacles provided. 3. Install three screws (E) to secure the LOI module. Rosemount OCX8800C...
Page 262 10-36) must be in upper left corner of receptacle. 3. Install flash PROM. Install cover Procedure 1. If removed, install cover gasket. a) Screw cover (A, Figure 10-32) onto electronics housing. b) Tighten cover firmly. c) Align locking clip (B) with gap between cover ribs. Emerson.com/Rosemount...
Page 263: Replace Tube Fittings
WARNING Burns The pipe threads are bonded with a pipe thread sealant. The thread sealant softens at 450 °F (232 °C). The heated parts can cause severe burns. Use heat resistant gloves when removing a damaged tube fitting. Rosemount OCX8800C...
Page 264 Maintenance and service Manual April 2023 00809-0500-4881 Figure 10-37: Removing Tube Fittings A. Tube fitting (Type 13) B. Tube fitting C. Tube fitting (Type R) D. Sensor housing E. Tube fitting (Type F) F. Electronics housing Emerson.com/Rosemount...
Page 265 2. Apply pipe thread sealant (Loctite #567) to the mating threads of the tube fitting. Do not apply sealant to the first turn of the external pipe threads. 3. Install and tighten the tube fitting in the mating port of sensor or electronic housing. Rosemount OCX8800C...
Page 266 Maintenance and service Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 267: Chapter 11 Replacement Parts
Manual Replacement parts 00809-0500-4881 April 2023 11 Replacement parts 11.1 Sensor housing Refer to Figure 11-1 Figure 11-2 for sensor housing parts. Figure 11-1: Sensor Housing Components (Sheet 1 of 2) Rosemount OCX8800C...
Page 268 COe insulator 1A99746H02 Band heater 1A99749H01 Thermocouple 1A99747H01 Elbow 5R10200H01 Eductor 6A00123G01 CJC sensor (resistance temperature device [RTD] assembly, ring type) 6P00155H02 Insulator 1A98765H02 Heater rod (2 required) 1A99520H01 Watlube heater release agent 9886A15H01 Thermal switch insulator 5R10268H02 Thermal switch Emerson.com/Rosemount...
Page 269 Tube, sample, 18-in. (457 mm) ceramic 5R10183H03 Tube, sample, 3 ft. (0.91 m) 316 stainless steel 5R10183H07 Tube, sample, 3 ft. (0.91 m) Inconel 600 5R10227G02 Tube, sample, 3 ft. (0.91 m) ceramic 5R10183H04 Tube, sample, 6 ft. (1.83 m) 316 stainless steel Rosemount OCX8800C...
Page 270 Hasteloy in-situ filter, 10 micron, high temperature (stainless steel and Inconel sample tubes only) 6P00349H01 In-situ filter, 20 micron, high surface area 6P00162H01 Flange insulator (optional) 3535B18H02 Flange gasket, ANSI 3553B45H01 Flange gasket, DIN 5R10279G01 Tube fitting, type R 771B870H04 Tube fitting, standard Emerson.com/Rosemount...
Page 271: Electronics Housing
Table 11-2: Sensor Housing Components (Sheet 2) Index number Part number Description 5R10279G03 Tube fitting, type 13 5R10267G01 Tube fitting, flame arrestor, type F 11.2 Electronics housing Figure 11-3: Electronics Housing Components for Rosemount OCX8800 with Integral Electronics Rosemount OCX8800C...
Page 272 Fuse (F1 and F6), 10 amp, 250 Vac 1A99766H01 Fuse (F3), 4 amp, 250 Vac 1A99766H02 Fuse (F4), 8 amp, 250 Vac 1A99089H02 Cover gasket (O-ring) 5R10219G01 Cover, blind 5R10199G01 Cover, window 6A00115G02 Local operator interface (LOI) module 1A99112H05 LOI connector 5R10235G01 LOI board Emerson.com/Rosemount...
Page 273 Figure 11-4: Electronics Housing Components for Rosemount OCX8800 with Remote Electronics Table 11-4: Electronics Housing Components for Rosemount OCX8800 with Remote Electronics Index number Part number Description 1A97902H01 Hose 1A97905H02 Solenoid valve, 3-way 1A97905H01 Solenoid valve, test gas 6A00132G01 Electronics stack, HART Special order Flash PROM, programmed Rosemount OCX8800C...
Page 274 1A99766H02 Fuse (F4), 8 amp, 250 Vac 1A99089H02 Cover gasket (O-ring) 5R10219G01 Cover, blind 5R10199G01 Cover, window Figure 11-5: EMI Filter and Terminal Block A. Brown B. Blue C. Green D. Filter, EMI E. Ground Wire F. Terminal block Emerson.com/Rosemount...
Page 275: Cell And Heater Strut Assembly
00809-0500-4881 April 2023 Table 11-5: EMI Filter and Terminal Block Parts Index letter Part number Description 1A98467H01 Filter, EMI 5R10238G01 Ground wire 1A99714H01 Terminal block 11.3 cell and heater strut assembly Figure 11-6: O Cell and Heater Strut Assembly Rosemount OCX8800C...
Page 276 Refer to item 7. cell (part of O cell replacement kit, item 7) Refer to item 7. Screw (part of O cell replacement kit, item 7) 4851B45G01 cell replacement kit, standard sensing cell 4851B45G03 cell replacement kit, high sulfur cell Emerson.com/Rosemount...
Page 277: Appendix A Safety Data
The following safety instructions apply specifically to all EU member states. They should be strictly adhered to in order to ensure compliance with the Low Voltage Directive. Non- EU states should also comply with the following unless superseded by local or national standards. Rosemount OCX8800C...
Page 278 Reference Manual has been allowed for the equipment to cool down - and then only by trained service personnel. Emerson.com/Rosemount...
Page 279: Safety Data Sheet For Ceramic Fiber Products
Table A-1: Material, Quantity, and Threshold Exposure Limit Values Aluminosilicate (vitreous) 99 + % 1 fiber/cc TWA CAS No. 142844-00-06 10 fibers/cc CL Zirconium silicate 0-10% 5 mg/cubic meter (TLV) Black surface coating 0-1% 5 mg/cubic meter (TLV) Rosemount OCX8800C...
Page 280 4. Pleural plaques (thickening along the chest wall) have been observed in a small number of employees who had a long duration of employment. There are several occupational and non-occupational causes for pleural plaque. It should be noted Emerson.com/Rosemount...
Page 281 Steps to be taken if material is released or spilled Where possible, use vacuum suction with HEPA filters to clean up spilled material. Use dust suppressant where sweeping if necessary. Avoid clean up procedure which may result in water pollution. (See Exposure and personal protection equipment (PPE)). Rosemount OCX8800C...
Page 282 (e.g., 3M 7800S with W9435 hose & W3196 low pressure regulator kit connected to clean air supply or equivalent). If airborne fiber or cristobalite concentrations are not known, as minimum protection, use NIOSH/MSHA approved half face, air purifying respirator with HEPA filter cartridges. Emerson.com/Rosemount...
Page 283 Appearance and odor Cream to white colored fiber shapes. With or without optional white to gray granular surface coating and/or optional black surface coating 12 - 25 lb./cubic foot Specific weight Boiling point Volatiles (percent by weight) Water solubility Rosemount OCX8800C...
Page 284: High Pressure Gas Cylinders
Never permit a flame to come in contact with any part of a compressed gas cylinder. 8. Do not place cylinders where they may become part of an electric circuit. When electric arc welding, take precautions to prevent striking an arc against the cylinder. Emerson.com/Rosemount...
Page 285: Appendix B Product Certifications
Manual Product certifications 00809-0500-4881 April 2023 B Product certifications A copy of the Declaration of Conformity can be found at the end of the Quick Start Guide. The most recent Declaration of Conformity can be found at Emerson.com/Rosemount. Rosemount OCX8800C...
Page 286 Product certifications Manual April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 287: Appendix Cspa With Hart ® Alarm
It connects to a standard HART field device and provides up to four, fully configurable, contact-closure outputs based on readings of the HART digital data. The four Rosemount OCX8800 alarm outputs recognized by the SPA are Low O , High COe, Calibration Status, and OCX Unit Failure. Rosemount OCX8800C...
Page 288 SPA with HART alarm Manual ® April 2023 00809-0500-4881 Figure C-1: SPA with HART Alarm A. SPA display window B. Right-hand buttons C. Left-hand buttons Emerson.com/Rosemount...
Page 289: Install
Install Refer to Figure C-2 for the typical interface connections for the Rosemount OCX8800 and the SPA with HART alarm. ® Refer to the Moore Industries SPA user manual for additional information concerning SPA installation, setup, and operation. Rosemount OCX8800C...
Page 290: Setup
C.3.1 Jumper and switch settings If the SPA with HART was factory-configured by Emerson for operation with your ® transmitter, jumper and switch setting adjustments are not required. However, you may use the following procedure to verify that the jumper and switch settings are correct.
Page 291 3. Check the position of the failsafe Dip switches. Position the Dip switches as shown in Figure C-3. 4. Check the position of the source current Dip switches. Position the Dip switches as shown in Figure C-3. 5. Reinstall the SPA access cover. Rosemount OCX8800C...
Page 292 When connecting an AC power source, use the AC and ACC (AC Common) terminals. For a DC source, use the AC and ground terminals. 3. If desired, connect the 4 to 20 mA O signal wires from the transmitter analog output terminal block to the SPA input terminals. Emerson.com/Rosemount...
Page 293 Press SELECT to select the displayed menu or submenu command or select a displayed parameter variable. Figure C-5 shows the SPA menu, submenu, and parameter values that must be selected to configure the SPA for use with the transmitter. Use the following instructions and selections to properly configure the SPA. Rosemount OCX8800C...
Page 294 SPA are to the right of the command window. In the submenu views shown: means press down. means press up. means press SELECT one time. Emerson.com/Rosemount...
Page 295 To exit the menu, repeatedly press SELECT to display any main menu command. Then press until CONF EXIT is displayed. Select CONF EXIT. The SPA user manual provides detailed instructions concerning the configuration menu and the submenu structure for each main command. Rosemount OCX8800C...
Page 296 SPA with HART alarm Manual ® April 2023 00809-0500-4881 Emerson.com/Rosemount...
Page 297: Appendix D Returning Material
To expedite the return process outside of the United States, contact the nearest Rosemount representative. Within the United States, call the Emerson Instrument and Valves Response Center using the 1-800-654-RSMT (7768) toll-free number. This center, available 24 hours a day, will assist you with any needed information or materials.
Page 298 Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service 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 respective owners.

Emerson Rosemount OCX8800C Manual

Chapter 2 Install

Chapter 5 Using HART ® Communications

Chapter 6 Calibration

Chapter 7 Field Communicator

Chapter 8 FOUNDATION ™ Fieldbus

Chapter 9 Troubleshoot

Chapter 11 Replacement Parts

Appendix A Safety Data

Appendix B Product Certifications

Appendix Cspa with HART ® Alarm

Appendix D Returning Material

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