Instruction Manual

IB-106-300NH Rev. 4.2 July 2002

World Class 3000

Table 6-3. Cell Troubleshooting (continued)

Problem

Cause

Corrective Action

Status is ResHi or CalEr.

Cell mV = -20 to 120 mV (normal) (continued).

1. Reference air contamination (oil/water).

Clean or replace lines and valves as needed.

2. Cell leads reversed.

Check cell signal wiring from probe junction box to electronics, and correct wiring if needed.

3.Reference/test gas lines reversed. Switch piping as needed.

4.Diffusion element fault. Diffusion element cracked, broken, missing, or plugged.

Replace diffusor or snubber as needed. Diffusors are disposable because it is difficult to clean a diffusor and know the tiny pores are open. A flow and pressure test with a manometer is possi- ble but usually not practical. To clean a snubber, blow off surface dirt with pressurized air and clean the unit in an ultrasonic bath.

5. Faulty cell. Low sensor cell output when test gas is applied.

If test gas flow is good and there is low cell signal, replace the cell, or call the SCAN line for assistance.

Typical cell output:

Test Gas

mV

8.0%

18 to 25

0.4%

76 to 86

6. Cell performance degraded from aging.

Replace the sensor cell if its resistance has increased beyond 1 kOhm and the slope calculated during calibration has decreased lower than 40 mV/decade.

7. Electronics fault. Cell output is good, and the input to the electronics is good.

Check the electronics package. In an IFT, replace the microprocessor or interface board as needed. In a CRE, replace the DPI board if needed.

Status is Res Hi.

Cell mV = -120 to 20 mV.

1. Cell leads reversed.

Check cell signal wiring from probe junction box to electronics, and correct wiring if needed.

2.Reference/test gas lines reversed. Switch piping as needed.

3.Reference air (nitrogen).

Confirm labels on test gas bottles are correct. 100% nitrogen must NOT be used as a zero gas because cell protection will engage and affect the O2 reading. Reference air should be clean, dry instrument air prepared from ambient air with 20.95% O2.

6-6 Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management

Page 89 Page 91
Page 90
Image 90
Emerson Process Management 3000 instruction manual Status is Res Hi Cell mV = -120 to 20 mV
Page 89 Page 91

3000 specifications

Emerson Process Management is a key player in the field of industrial automation, and one of its flagship offerings is the Emerson Process Management 3000. This system is designed to optimize production processes across a variety of industries, enhancing efficiency and ensuring robust operational performance.

One of the main features of the Emerson Process Management 3000 is its advanced control capabilities. The system employs model predictive control (MPC) technology, which allows for real-time data processing and decision-making. By predicting future trends in process variables, the MPC enables operators to adjust control parameters proactively, minimizing fluctuations and improving overall productivity.

Additionally, the Emerson 3000 integrates seamlessly with existing industrial infrastructure. This system supports a wide range of communication protocols, ensuring compatibility across various devices and sensors. Its flexibility allows companies to leverage their investment in existing technologies while upgrading to more modern control strategies.

The user interface of the Emerson Process Management 3000 is highly intuitive, featuring graphical displays that provide operators with clear visibility into process parameters. This interface is designed for ease of use, with customizable dashboards that can be tailored to meet the specific needs of the users. Training time is significantly reduced due to the straightforward design, leading to quicker onboarding for new operators.

In terms of data analytics, the Emerson 3000 also stands out. It features built-in data logging and trend analysis capabilities, empowering operators to make informed decisions based on historical and real-time data. This analytical strength helps in identifying inefficiencies and potential areas for improvement, contributing to reduced downtime and lower operational costs.

Safety is another critical characteristic of the Emerson Process Management 3000. The system includes robust safety features and compliance with various industry standards. By integrating safety into the control process, it ensures that product quality and equipment integrity are maintained, thus safeguarding both personnel and assets.

Overall, Emerson Process Management 3000 is a sophisticated control system that combines advanced technologies, user-friendly design, and robust safety features. Ideal for industries such as oil and gas, chemicals, and water treatment, it is designed to enhance operational efficiency and drive productivity in modern industrial environments.
Top Page Image Contents