Instruction Manual

IM-106-880, Rev 1.0 January 2007

OCX 8800

Figure 6-10. O2 Cell, Heater,

and Thermocouple, Exploded

View

Do not remove the O2 cell unless you are certain it needs to be replaced. Removal may damage the cell and platinum pad. Remove the O2 cell for cell replacement only.

4

6

7

8

9

12

11

10

1.Screw

2.O2 Cell

3.Heater Tube

4.Contact/ Thermocouple Assembly

5.Gasket

6.Screw

7.Lockwasher

8.Return Wire

9.Heater Strut Assembly

10.Spring Clip

11.Spring

12.Strut Bracket

3

5

Test Gas

Passage

Holes

1

2

37390032

 

 

Disassemble O2 Cell and Heater Strut Assembly

Do not attempt to replace the O2 cell until all other possibilities for poor performance have been considered. If cell replacement is needed, order the O2 cell replacement kit (Refer to Section 8, Replacement Parts).

The O2 cell replacement kit contains an O2 cell and flange assembly, gaskets, socket head cap screws, and anti-seize compound. The items are carefully packaged to preserve precise surface finishes.

Do not remove items from the package until they are ready to be used.

1.Remove the four allen cap screws (1, Figure 6-10)from the O2 cell (2). Remove the O2 cell. The cell flange has a notch that may be used to gently pry the flange away from heater tube (3).

NOTE

The pad on the end of contact/thermocouple assembly (4) will sometimes fuse to the O2 cell (2).

2.If the O2 cell is fused to the contact pad, push the O2 cell back into the heater tube (against spring pressure) and quickly twist the O2 cell. The cell and contact pad should separate. If the contact pad stays fused to the cell, a new contact/thermocouple assembly (4) must be installed.

3.Remove and discard gasket (5). Clean the mating surface of heater tube (3). Remove burrs and raised surfaces with a block of wood and crocus cloth.

Use care when handling contact and thermocouple assembly. The ceramic rod in this assembly is fragile.

4.Remove screws (6), lockwashers (7), return wire (8), and heater strut assembly (9).

5.If replacing contact and thermocouple assembly (4), use a pencil to mark location of spring clip (10) before removing. Squeeze tabs on spring clip to remove. Retain spring clip and spring (11); replace if damaged.

6.While carefully handling new contact and thermocouple assembly (4) lay old assembly next to new one. Transfer match marks to new assembly.

7.Carefully guide new contact and thermocouple assembly (4) through strut bracket (12), spring (11), and spring clip (10) until spring clip reaches pencil mark.

6-13

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Image 71
Emerson 8800 10. O2 Cell, Heater Thermocouple, Exploded View, Disassemble O2 Cell and Heater Strut Assembly
Page 70 Page 72

8800 specifications

The Emerson 8800, a pivotal instrument in industrial automation, stands out for its robust features and cutting-edge technologies. Designed to enhance process efficiency and reliability, this device is integral to numerous industries, including oil and gas, chemical, and power generation.

One of the standout features of the Emerson 8800 is its advanced control capabilities. It incorporates a highly flexible control architecture that supports a wide variety of control schemes. This adaptability allows engineers to implement customized solutions tailored to specific process requirements. Additionally, the 8800 series includes integrated predictive diagnostics that continually monitor system performance, alerting operators to potential issues before they escalate into serious problems.

The technology powering the Emerson 8800 is equally impressive. Equipped with state-of-the-art microprocessors, it can handle complex calculations and data processing with remarkable speed and accuracy. The device supports multiple communication protocols, including Foundation Fieldbus, HART, and Modbus. This flexibility ensures seamless integration with existing systems, thereby enhancing data sharing and communication between devices.

Moreover, the Emerson 8800 features a user-friendly interface that simplifies operation and monitoring. The intuitive display allows operators to easily navigate through various settings and real-time data, promoting better decision-making and faster response times. This ergonomic design enhances usability in high-pressure environments, ultimately contributing to improved safety and operational efficiency.

Another key characteristic of the Emerson 8800 is its durability and reliability. Built to withstand the rigors of industrial environments, the device boasts a robust enclosure, ensuring protection against dust, moisture, and extreme temperatures. This reliability minimizes the risk of downtime, making it a cost-effective choice for industries where uptime is critical.

In summary, the Emerson 8800 emerges as a powerhouse in the realm of industrial automation. With its advanced control systems, diverse communication capabilities, user-friendly interface, and rugged design, it embodies efficiency and reliability. As industries continue to evolve, the Emerson 8800 stands ready to meet the challenges of modern automation, driving innovation and productivity in complex environments.
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