Instruction Manual

IM-106-880, Rev 1.0 January 2007

OCX 8800

D/A TRIM PROCEDURES O2 D/A trim procedure using HART/AMS

Use the following procedure to perform the O2 D/A trim procedure using the

HART communicator or AMS. Refer to the HART menu tree, Figure 4-3.

NOTE

To select a menu item, either use the up and down arrow keys to scroll to the menu item and press the right arrow key or use the number keypad to select the menu item number.

To return to a preceding menu, press the left arrow key.

1.From the DIAG/SERVICE menu, select D/A TRIM. The HART communicator displays O2 D/A Trim.

2.Press the right arrow key to start the procedure. (If you wish to exit D/A Trim with no changes, select ABORT.)

3.The HART communicator displays WARNING: Loop should be removed from automatic control. Remove the OCX 8800 from any automatic control loops to avoid a potentially dangerous operating condition and press OK.

4.Remove the electronics housing cover.

5.Refer to Figure 2-4.Connect a digital multimeter to read the milliamp output from the O2 D/A coverter circuit. Connect the positive lead to the AOUT1+ terminal and connect the negative lead to the AOUT1- terminal. Then, press OK at the HART communicator.

6.The HART communicator displays Setting Fld dev output to 4 mA. Press OK. Read the O2 millamp output at the digital multimeter. Enter the reading at the HART communicator and press ENTER. (Select ABORT to exit without changes).

7.The HART communicator displays Setting Fld dev output to 20 mA. Press OK. Read the O2 millamp output at the digital multimeter. Enter the reading at the HART communicator and press ENTER. (Select ABORT to exit without changes).

8.The HART communicator displays Setting Fld dev output to 4 mA. Press OK.

9.The HART communicator displays Fld dev output 4.00 mA equal to reference meter? Using the up or down arrow, select 1 Yes or 2 No and Press ENTER. If No, the process repeats from step 6.

10.The HART communicator displays Setting Fld dev output to 20 mA. Press OK.

11.The HART communicator displays Fld dev output 20.00 mA equal to reference meter? Using the up or down arrow, select 1 Yes or 2 No and Press ENTER. If No, the process repeats from step 7.

12.The HART communicator displays NOTE: Loop may be returned to automatic control.

4-9

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Emerson 8800 instruction manual Trim Procedures O2 D/A trim procedure using HART/AMS
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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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