ABB 266DSHASHA4A1B1 HART DP Pressure Transmitter

ABB 266DSHASHA4A1B1 HART DP Pressure Transmitter is a high-performance differential pressure transmitter in the ABB 2600T series, featuring a standard DP-style design with long-term stability and a base accuracy of ±0.06%. It measures differential pressure for flow, level, and density applications in the process industry, with measuring range limits from 0.05 to 16000 kPa (0.2 to 2320 psi). Depending on the configuration encoded in the model code, the transmitter supports HART, PROFIBUS PA, or FOUNDATION Fieldbus communication for integration with DCS and PLC systems.

Product Datasheet

• Brand: ABB
• Model: 266DSHASHA4A1B1
• Series: 2600T
• Product Name: Differential Pressure Transmitter (DP-Style)
• Base Accuracy: ±0.06%
• Measuring Range Limits: 0.05 to 16000 kPa (0.2 to 2320 psi)
• Communication Protocols: HART, PROFIBUS PA, FOUNDATION Fieldbus (per 266DSH family)
• Application: Differential pressure, flow, level, and density measurement

Fault Troubleshooting and Common Questions

1. The transmitter produces no output or does not respond. Check the loop power supply, wiring, and terminal connections. Verify the supply voltage is within the transmitter’s rating and that the loop is not open or shorted.
2. Readings are inaccurate or unstable. Inspect the impulse lines, manifold valves, drain/vent ports, and sealing for leaks or blockage. Verify the transmitter is properly zeroed and that the configured range and engineering units match the application.
3. The output does not follow process changes. Check that the process isolation valves are open and the manifold is correctly positioned. Confirm the range configuration and, if the problem persists, follow approved maintenance procedures.
4. Can the 266DSHASHA4A1B1 replace another differential pressure transmitter? Not without verification. Compare the full model code, measuring range, accuracy, communication protocol, process connection, and materials of construction with the existing installation requirements.

Safety Precautions

• Isolate and depressurize the process before removing or installing the transmitter.
• Use electrostatic discharge protection when handling electronic assemblies.
• Verify loop wiring and power ratings before energizing the transmitter.
• Do not exceed the rated static pressure or temperature limits of the transmitter.
• Use qualified personnel for troubleshooting and commissioning in operating process systems.

Frequently Asked Questions

Q1: What is the ABB 266DSHASHA4A1B1? It is a differential pressure transmitter in the ABB 2600T series with a DP-style design, used for differential pressure, flow, level, and density measurement.

Q2: What is the accuracy of the transmitter? The 266DSH offers a base accuracy of ±0.06%.

Q3: What measuring range does it cover? The measuring range limits span from 0.05 to 16000 kPa (0.2 to 2320 psi), depending on the configured range.

Q4: Which communication protocols are supported? The 266DSH family supports HART, PROFIBUS PA, and FOUNDATION Fieldbus, depending on the model configuration.

Q5: What should be checked before purchase? Verify the full model code, measuring range, accuracy, communication protocol, process connection, and materials of construction against the application requirements.