Emerson Rosemount OCX 8800 Manuale utente
Quick Start Guide
00825-0200-4880, Rev AD
February 2020
Rosemount™ OCX8800 Oxygen and
Combustibles Transmitter
with FOUNDATION™ Fieldbus Protocol
Essential instructions
Emerson designs, manufactures, and tests its products to meet many national and international
standards. Because these instruments are sophisticated technical products, you must properly install,
use, and maintain them to ensure they continue to operate within their normal specifications. You
must adhere to the following instructions and integrate them into your safety program when
installing, using, and maintaining Emerson's Rosemount products.
•Read all instructions prior to installing, operating, and servicing the product.
•Install equipment as specified in the installation instructions of the appropriate Reference Manual
and per applicable local and national codes. Connect all products to the proper electrical and
pressure sources.
Symbols
Earth (ground) terminal
Protective conductor terminal
Risk of electrical shock
Refer to reference manual.
Contents
Description and specifications......................................................................................................3
Installation................................................................................................................................... 4
Configuration and startup.......................................................................................................... 31
Using the local operator interface (LOI)...................................................................................... 38
Calibration................................................................................................................................. 41
Product certifications................................................................................................................. 47
Declaration of Conformity..........................................................................................................52
China RoHS table........................................................................................................................55
Quick Start Guide February 2020
2 Rosemount OCX8800
1 Description and specifications
1.1 Component checklist
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.
February 2020 Quick Start Guide
Quick Start Guide 3
2 Installation
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.
WARNING
Hazardous areas
The Rosemount OCX88A can be installed in general purpose areas only. The
Rosemount Xi Advanced Electronics can be installed in general purpose
areas only.
Do not install the Rosemount OCX88A in hazardous areas.
Do not install the Rosemount Xi in hazardous areas or in the vicinity of
flammable liquids.
WARNING
Hazardous areas
The Rosemount OCX88C may explode in hazardous areas.
All cable entry devices and blanking elements for unused apertures must
be certified flameproof, suitable for the conditions of use and properly
installed.
The sensor housing must not be mounted to any surface or flange that
exceeds 383 °F (195 °C).
The sample entering the sensor housing must not exceed 383 °F (195
°C).
Quick Start Guide February 2020
4 Rosemount OCX8800
WARNING
Electrical shock
Failure to install covers and ground leads could result in serious injury or
death.
Install all protective equipment covers and ground leads after
installation.
If external loop power is used, the power supply must be a safety extra
low voltage (SELV) type.
Note
Plug all unused ports on the probe housing and Rosemount Xi enclosure
with a suitable filling.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or
misconfiguration of end users’ equipment. This could be intentional or
unintentional and needs to be protected against.
Physical security is an important part of any security program and
fundamental to protecting your system. Restrict physical access by
unauthorized personnel to protect end users’ assets. This is true for all
systems used within the facility.
2.2 Mechanical installation
2.2.1 Select a location
The location of the transmitter in the stack or flue is important for maximum
accuracy in the oxygen analyzing process. You must position the probe so
the gas it measures is representative of the process.
For best results, position the transmitter near the center of the duct (40 to
60 percent insertion). Longer ducts may require several transmitters since
the oxygen and combustibles can vary due to stratification. A point too near
the wall of the duct or the inside radius of a bend may not provide a
representative sample because of the very low flow conditions. Select the
sensing point so the process gas temperature falls within the range of probe
material used. #unique_11/unique_11_Connect_42_fig_rds_cc3_5jb
through #unique_11/unique_11_Connect_42_fig_a2b_pl3_5jb provide
mechanical installation references.
February 2020 Quick Start Guide
Quick Start Guide 5
CAUTION
Damage to the electronics may result.
Do not allow the temperature of the electronics housing to exceed 185 °F
(85 °C).
CAUTION
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.
Procedure
1. Check the flue or stack for holes and air leakage.
The presence of this condition will substantially affect the accuracy of
the oxygen and combustibles readings. Make the necessary repairs
or install the transmitter upstream of any leakage.
2. Ensure the area is clear of internal and external obstructions that will
interfere with installation and maintenance access to the transmitter.
Allow adequate clearance for the removal of the transmitter.
2.2.2 Installation
Procedure
1. Ensure all components are available to install the Rosemount
OCX8800. Refer to Figure 1-1
2. The Rosemount OCX8800 may be installed intact as it is received.
3. Weld or bolt adapter plate onto the duct.
4. Use the pipe or wall mounting hardware to mount a remote
electronics housing. Choose a location that does not exceed the
length of the electronics cable ordered.
5. Ensure the conduits drop vertically from the Rosemount OCX8800
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.
6. Where a positive stack pressure exists at the installation site, connect
all pneumatic lines prior to installing the Rosemount OCX8800 in the
stack or ductwork.
Quick Start Guide February 2020
6 Rosemount OCX8800
Note
If process temperatures will exceed 392 °F (200 °C), use anti-seize
compound on stud threads to ease future removal of the Rosemount
OCX8800.
7. Insert sample and exhaust tubes through the opening in the
mounting flange and bolt the unit to the flange.
Note
Uninsulated stacks or ducts may cause ambient temperatures in the
electronics housing to exceed 185 °F (85 °C) and damage the
electronics.
8. If insulation is removed to access the duct for Rosemount OCX8800
mounting, make sure to replace insulation afterward.
February 2020 Quick Start Guide
Quick Start Guide 7
Example
Figure 2-1: Installation, Rosemount OCX8800 with Integral Electronics
A. Alarm output relay terminal block
B. FOUNDATION™ fieldbus
C. HART®
D. Signal output terminal block
E. Ground stud
F. Earth ground typical for electronics and sensor housing
G. Ground
H. Customer wiring
I. Terminal block
Quick Start Guide February 2020
8 Rosemount OCX8800
J. EMI filter
K. External tooth lockswasher
L. Signal port ¾ NPT
M. Power port ¾ NPT
2.3 Electrical installation
All wiring must conform to local and national codes. Figure 2-2 shows
factory wired solenoid power connections.
WARNING
Failure to install covers and ground leads could result in serious injury or
death.
Install all protective equipment covers and safety ground leads after
installation.
WARNING
To meet the Safety Requirements of IEC 61010 (EC requirement), and
ensure safe operation of this equipment, connection to the main electrical
power supply must be made through a circuit breaker (min 10 A) in close
proximity and marked for this equipment which will disconnect all current-
carrying conductors during a fault situation. 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.
Note
To maintain proper earth grounding, ensure a positive connection exists
between the sensor housing, the electronics housing, and earth. The
connecting ground wire must be 14 AWG minimum. Refer to Figure 2-2.
Note
Line voltage, signal, and relay wiring must be rated for at least 221 °F
(105 °C).
February 2020 Quick Start Guide
Quick Start Guide 9
2.3.1 Electrical connections
Make electrical connections, power, and communications to the electronics
enclosure through two ¾ national pipe thread (NPT) ports in the enclosure,
using fittings and cables provided by the customer.
Cable installation must meet NEC, IEC, and/or other applicable national or
local codes for Class I, Zone 1, IIB +H2 T3/T6 permanently mounted
equipment.
2.3.2 Connect line voltage
The transmitter operates on 100 to 240 Vac line voltage at 50 to 60 Hz. The
power supply requires no setup.
Connect the line (L wire) to the L terminal and the neutral (N wire) to the N
terminal on the AC power input terminal block in the electronics housing.
Connect the ground (G wire) to the ground stud in the electronics housing as
shown in Figure 2-2.
2.3.3 Connect output signals
The transmitter comes with a single FOUNDATION™ Fieldbus signal.
Connect the output terminals in the electronics housing as shown in Figure
2-2.
Use individual shielded twisted wire pairs. Terminate the shield at the
electronics housing.
2.3.4 Oxygen (O2) 4-20 mA signal
One 4-20 mA signal represents the O2 value.
Superimposed on the O2 signal is the FOUNDATION™ Fieldbus information
accessible through a handheld communicator or AMS Device Manager
software.
The O2 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.
2.3.6 FOUNDATION™ Fieldbus signal
The FOUNDATION Fieldbus signal provides all output information and is
accessible through a Handheld Communicator.
2.3.7 Alarm output relay
Connect any customer-supplied relay input to the alarm output relay
terminal. Use shielded wire and terminate the shield at the electronics
Quick Start Guide February 2020
10 Rosemount OCX8800
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