Emerson Rosemount OCX 8800 Bedienungsanleitung

Quick Start Guide

00825-0100-4880, Rev AC

October 2019

Rosemount™ OCX8800 Oxygen and

Combustibles Transmitter

with 4–20 mA HART® 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. The

following instructions must be adhered to and integrated into your safety program when installing,

using, and maintaining Emerson 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................................................................................................................................... 5

Configuration and startup.......................................................................................................... 33

Using the LOI..............................................................................................................................41

Calibration................................................................................................................................. 44

Product certifications................................................................................................................. 53

Declaration of Conformity..........................................................................................................58

Quick Start Guide October 2019

2 Quick Start Guide

1 Description and specifications

1.1 Component checklist

A typical Rosemount OCX8800 Oxygen/Combustibles Transmitter package

should contain the items shown in Figure 1-1.

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.

October 2019 Quick Start Guide

Quick Start Guide 3

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

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4 Quick Start Guide

2 Installation

2.1 Product safety

WARNING

EXPLOSIONS

The Rosemount OCX8800 may explode if used in hazardous areas.

The Rosemount OCX88A can be installed in general purpose areas only.

Do not install the Rosemount OCX88A in hazardous areas.

To maintain explosion-proof protection of the Rosemount OCX88C 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.

To maintain explosion-proof protection of the Rosemount OCX88C in

hazardous areas, the sensor housing must not be mounted to any

surface or flange that exceeds 383 °F (195 °C).

To maintain explosion-proof protection of the Rosemount OCX88C in

hazardous areas, the sample entering the sensor housing must not

exceed 383 °F (195 °C).

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.

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- 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. The ambient temperature inside the electronics housing

must not exceed 185 °F (85 °C).

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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 unit.

Allow adequate clearance for the removal of the transmitter.

2.2.2 Install

Procedure

1. Ensure all components are available to install the transmitter.

Refer to Figure 1-1. You may install the transmitter intact as it is

received.

2. Weld or bolt adapter plate onto the duct.

3. 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.

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.

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6 Quick Start Guide

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.

Note

If process temperatures will exceed 392 °F (200 °C), use anti-seize

compound on stud threads to ease future removal of the transmitter.

6. 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.

7. If insulation is removed to access the duct for mounting the

transmitter, make sure to replace insulation afterward.

2.3 Electrical installation

All wiring must conform to local and national codes. Figure 2-1 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.

October 2019 Quick Start Guide

Quick Start Guide 7

WARNING

The transmitter 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).

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 2-1.

Note

Line voltage, signal, and relay wiring must be rated for at least 221 °F

(105 °C).

2.3.1 Electrical connections

Make electrical connections, power, and communications to the electronics

enclosure through two ¾ 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 2-1.

2.3.3 Connect output signals

The transmitter comes with two 4-20 mA signals with HART® on the oxygen

O2 signal.

Connect the output terminals in the electronics housing as shown in Figure

2-1. Use individual shielded twisted wire pairs. Terminate the shield at the

electronics housing.

Quick Start Guide October 2019

8 Quick Start Guide

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 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

housing. The alarm output relay terminal is a set of dry, no. 2, form C,

contacts with 30 mA, 30 Vdc capacity.

2.3.7 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 2-2).

Braided cable is available in lengths up to 150 ft. (46 m).

Note

Interconnect wiring shown is for Rosemount supplied cables. For customer

furnished interconnect wiring or cables, refer to Figure 2-3.

2.3.8 Signal connections

Connect the electronics housing terminals to the corresponding terminals in

the sensor housing. The twisted wire pairs are numbered on the inner plastic

wrapper. Keep twisted pairs together and match the numbers and wire

colors shown in Figure 2-2.

2.3.9 Heater power connections

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 as shown in Figure 2-2.

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Quick Start Guide 9

Figure 2-1: Line Voltage, Earth, and 4-20 mA Connections

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

J. EMI filter

Quick Start Guide October 2019

10 Quick Start Guide

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