Cell Problem, Cell Troubleshooting Problem

World Class 3000

Instruction Manual

IB-106-300NH Rev. 4.3 May 2005

6-5 CELL PROBLEM

For cell troubleshooting, as in heater problems, you should allow at least 30 minutes for operat- ing temperature to stabilize. After this warmup period, observe the system status and cell volt- age. If the heater is working, troubleshoot the cell. If the heater is not working, refer to Heater Problem, paragraph 6-4.

•The status line may read: Low O2, Hi O2, CalEr, ResHi.

•Access voltage values in the proper menu. Use the DIAGNOSTIC DATA sub-menu of the PROBE DATA menu.

•The displayed O2 value will read 0% to 99%.

•It may be helpful to observe the calibration status and parameters from the last calibra- tion: Slope, Constant, and Cell Resistance. In the CALIBRATE menu, VIEW CON- STANTS shows previous calibration values, and CALIBRATION STATUS shows the latest values. If these values appear out of range, perform a calibration before trouble- shooting the cell.

Refer to Table 6-3 to troubleshoot cell related problems.

Table 6-3. Cell Troubleshooting

Problem

Cause

Corrective Action

Status is LowO2.

Cell mV = -127 mV.

1.Faulty cell connection or open. If the cell circuit is open, the cell output will show about -127 mV. Check cable connection between the probe and the electronics. Check that the probe spring presses the contact pad firmly onto the cell. Repair or replace faulty wires, spring, or connectors.

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

Check the electronics package. Replace the microprocessor or interface board as needed.

Status is ResHi or CalEr.

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

1. Test gas flow not 5 scfh (2.4 L/min).

Check test gas flow and related piping. Rotameter should show 5 scfh. Adjust needle valve for correct flow rate.

2. Incorrect test gas.

Confirm labels on test gas bottles are correct. Confirm High Gas and Low Gas values agree with labels on test gas bottles. (Refer to menu map — SETUP-CALIBRATION, High Gas, Low Gas.) Check all ports, cylinders, and gas lines for proper hookup. Change piping if necessary. Label pipes for reference.

Rosemount Analytical Inc. A Division of Emerson Process Management

Troubleshooting 6-5

3000 specifications

The Emerson 3000 is a cutting-edge control system designed to enhance the efficiency, reliability, and precision of industrial operations. Employed across various sectors such as oil and gas, pharmaceutical, food and beverage, and power generation, the Emerson 3000 has gained recognition for its robustness and versatility.

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The Emerson 3000 features a modular architecture, providing flexibility for scaling and customization. Operators can easily tailor the system to fit specific application needs, whether it requires additional control loops or integration with other systems. This adaptability is particularly beneficial for facilities planning for future expansions or modifications.

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In summary, the Emerson 3000 represents a fusion of advanced process control, modular design, IoT connectivity, robust cybersecurity, and user-centric interface, making it an ideal choice for industries seeking to enhance their operational performance while adapting to ever-evolving technological landscapes.

Emerson 3000 Cell Problem, Cell Troubleshooting Problem, Status is LowO2 Cell mV = -127 mV

Models: 3000