Troubleshooting

Table 11-5Process variables problems and possible remedies continued

Symptom

Cause

Possible remedy

 

 

 

Erratic non-zero flow rate under

RF interference

Check environment for RF interference.

no-flow conditions

 

See Section 11.14.4.

 

 

 

 

Wiring problem

Verify all sensor-to-transmitter wiring

 

 

and ensure the wires are making good

 

 

contact.

 

 

 

 

Incorrectly grounded 9-wire cable (in

Verify 9-wire cable installation. Refer to

 

remote core processor with remote

Appendix B for diagrams, and see the

 

transmitter installations)

installation manual for your transmitter.

 

 

 

 

Vibration in pipeline at rate close to

Check environment and remove source

 

sensor tube frequency

of vibration.

 

 

 

 

Leaking valve or seal

Check pipeline.

 

 

 

 

Inappropriate measurement unit

Check configuration. See

 

 

Section 11.19.

 

 

 

 

Inappropriate damping value

Check configuration. See Section 4.5.5

 

 

and Section 6.6.

 

 

 

 

Slug flow

See Section 11.17.

 

 

 

 

Plugged flow tube

Check drive gain and tube frequency.

 

 

Purge the flow tubes.

 

 

 

 

Moisture in sensor junction box

Open junction box and allow it to dry.

 

 

Do not use contact cleaner. When

 

 

closing, ensure integrity of gaskets and

 

 

O-rings, and grease all O-rings.

 

 

 

 

Mounting stress on sensor

Check sensor mounting. Ensure:

 

 

• Sensor is not being used to support

 

 

pipe.

 

 

• Sensor is not being used to correct

 

 

pipe misalignment.

 

 

• Sensor is not too heavy for pipe.

 

 

 

 

Sensor cross-talk

Check environment for sensor with

 

 

similar (±0.5 Hz) tube frequency.

 

 

 

 

Incorrect sensor orientation

Sensor orientation must be appropriate

 

 

to process fluid. See the installation

 

 

manual for your sensor.

 

 

 

Erratic non-zero flow rate when flow

Output wiring problem

Verify wiring between transmitter and

is steady

 

receiving device. See the installation

 

 

manual for your transmitter.

 

 

 

 

Problem with receiving device

Test with another receiving device.

 

 

 

 

Inappropriate measurement unit

Check configuration. See

 

 

Section 11.19.

 

 

 

 

Inappropriate damping value

Check configuration. See Section 4.5.5

 

 

and Section 6.6.

 

 

 

 

Excessive or erratic drive gain

See Section 11.23.3 and

 

 

Section 11.23.4.

 

 

 

 

Slug flow

See Section 11.17.

 

 

 

 

Plugged flow tube

Check drive gain and tube frequency.

 

 

Purge the flow tubes.

 

 

 

 

Wiring problem

Verify all sensor-to-transmitter wiring

 

 

and ensure the wires are making good

 

 

contact.

 

 

 

Compensation

Measurement Performance

Troubleshooting

Defaults

Configuration and Use Manual

99

Page 107
Image 107
Emerson Process Management 1500 manual 5Process variables problems and possible remedies

1500 specifications

Emerson Process Management 1500 is a cutting-edge distributed control system designed to enhance operational efficiency, safety, and reliability in industrial processes. Renowned for its robust architecture and scalable features, the 1500 system caters to various sectors, including oil and gas, pharmaceuticals, chemicals, and utilities.

One of the standout features of the Emerson 1500 is its modular design, allowing users to customize and scale the system according to their specific needs. This flexibility ensures that operations can grow and adapt without requiring a complete system overhaul. The control system supports a range of I/O modules, enabling integration with various field devices and technologies.

The Emerson 1500 employs advanced control algorithms to optimize process performance. This includes model predictive control (MPC) and multivariable control, which enhance the ability to manage complex processes through predictive analytics. This predictive capability not only improves operational efficiency but also reduces downtime and maintenance costs.

In addition to its advanced control features, the 1500 system is known for its user-friendly interface. Operators can easily navigate the system through intuitive graphics and dashboards, allowing them to monitor processes in real time. This ease of use significantly reduces training time and improves response times during operational changes or emergencies.

Security is a critical concern for modern industrial control systems, and the Emerson 1500 addresses this with a multi-layered security framework. This includes secure communications, robust authentication, and access controls, ensuring that only authorized personnel can interact with the system.

The Emerson Process Management 1500 also emphasizes interoperability, supporting various communication protocols such as Ethernet/IP, Modbus, and HART, facilitating seamless integration with existing infrastructure. This capability is particularly advantageous for organizations looking to modernize their systems without entirely replacing legacy equipment.

Furthermore, the system supports advanced data analytics and cloud connectivity, allowing organizations to leverage big data for predictive maintenance, performance benchmarking, and decision-making processes. By harnessing the power of data, users can achieve greater efficiencies and drive continuous improvement across their operations.

In summary, the Emerson Process Management 1500 is a versatile and advanced distributed control system characterized by modularity, advanced control features, user-friendliness, robust security, interoperability, and data analytics capabilities. Its comprehensive approach ensures that industries can not only meet current operational demands but also prepare for future challenges in an ever-evolving landscape.