MODEL 228

MAINTENANCE

MAINTENANCE

WARNING

Retraction chamber contents may be under pressure.

CAUTION

Be sure sensor has been cleaned of process liquid before handling.

Generally, the only maintenance required is to keep the opening of the sensor clear of deposits. Cleaning frequency is best determined by experience.

TROUBLESHOOTING

PROBLEM

PROBABLE CAUSE

SOLUTION

 

 

 

Off-scale reading

Wiring is wrong.

Verify and correct wiring.

 

 

 

 

RTD is open or shorted.

Check the RTD for open or short circuits.

 

 

See Figure 19.

 

 

 

 

Sensor is not in process stream.

Confirm that the sensor is fully submerged in

 

 

the process stream. See installation section.

 

 

 

 

Sensor is damaged.

Perform isolation checks. See Figure 19.

 

 

 

Noisy reading

Sensor is improperly installed in the

Confirm that the sensor is fully submerged

 

process stream.

in the process stream. See installation section.

 

 

 

 

Sensor cable is run near high voltage

Move cable away from high voltage conductors.

 

conductors.

 

 

 

 

 

Sensor cable is moving.

Keep sensor cable stationary.

 

 

 

Reading seems wrong (lower

Bubbles are trapped in the sensor,

Install the sensor in a vertical pipe run with the

or higher than expected)

particularly in the toroid opening.

flow against the toroid opening. Increase flow

 

 

if possible.

 

Sensor is not completely submerged in the

Confirm that the sensor is fully submerged

 

process stream.

in the process stream. See installation section.

 

 

 

 

Cell constant is wrong. Wall effects are

Calibrate the sensor in place in the process

 

present.

piping. See calibration section.

 

 

 

 

Wrong temperature correction algorithm

Check that the temperature correction is

 

is being used.

appropriate for the sample. See analyzer

 

 

manual for more information.

 

 

 

 

Temperature reading is inaccurate.

Disconnect the RTD leads (Figure 19) and

 

 

measure the resistance between the in and

 

 

common leads. Resistance should be close

 

 

to the value in Table 1.

 

 

 

 

Slow temperature response to sudden

Use an RTD in a metal thermowell for

 

changes in temperature.

temperature compensation.

 

 

 

Sluggish response

Sensor is installed in a dead area in the

Move sensor to a location more representative

 

piping.

of the process liquid.

 

 

 

 

Slow temperature response to sudden

Use an RTD in a metal thermowell for

 

changes in temperature.

temperature compensation.

 

 

 

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Emerson 228 specifications Maintenance, Troubleshooting, Problem Probable Cause Solution
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228 specifications

The Emerson 228 is a cutting-edge industrial controller designed for demanding applications across various sectors, including manufacturing, oil and gas, and process automation. Known for its robust performance and reliability, the Emerson 228 integrates advanced technologies to streamline operations and enhance productivity.

One of the standout features of the Emerson 228 is its modular architecture. This design allows users to customize the controller according to their specific needs by adding or removing modules as required. This flexibility is vital for adapting to changing production environments and scaling operations efficiently.

The Emerson 228 also boasts an intuitive user interface, which simplifies the configuration and monitoring processes. Operators can easily visualize processes through graphical displays, making it possible to diagnose issues quickly and respond in real time. This enhanced visibility significantly reduces downtime and improves overall operational efficiency.

Connectivity is another key characteristic of the Emerson 228. It supports a wide range of communication protocols, including Ethernet/IP, Modbus, and Profibus. This allows seamless integration with existing infrastructure and enables the controller to communicate with various devices, sensors, and other controllers, facilitating a holistic approach to automation.

In terms of performance, the Emerson 228 is designed to handle complex algorithms and data processing tasks with ease. It is equipped with advanced processing capabilities that enable high-speed data collection and analysis. This is particularly important in environments where rapid decision-making is critical to maintain production efficiency and safety.

The Emerson 228 is also built with durability in mind. It features robust construction and is rated for extreme temperatures and harsh conditions, ensuring reliable operation even in challenging environments. This reliability translates to lower maintenance costs and longer service life, making the Emerson 228 a cost-effective solution for businesses.

Energy efficiency is a focal point of the Emerson 228, featuring technologies that optimize power consumption without compromising system performance. This not only reduces operational costs but also supports sustainability initiatives within organizations, contributing to a greener industrial footprint.

In summary, the Emerson 228 stands out as a versatile and powerful industrial controller. Its modular design, user-friendly interface, extensive connectivity options, high processing performance, durability, and energy efficiency make it an ideal choice for modern industrial applications. Organizations looking to enhance their automation capabilities will find the Emerson 228 to be a reliable and effective solution.
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