DP Flow Transmitter Testing and Recalibration

Overview

This video explains how to test and recalibrate a Differential Pressure (DP) flow transmitter, which is essential for maintaining accurate flow measurement in industrial processes.

Over time, transmitters may lose accuracy due to drift, environmental conditions, or wear, so periodic testing and recalibration are required.

The process involves isolating the transmitter from the system, applying known pressure inputs, and comparing the output signal (typically 4–20 mA) with expected values.

If the output is خارج acceptable limits, adjustments such as zero and span calibration are performed to restore accuracy and ensure reliable operation.

What You Will Learn

• How to test a DP flow transmitter
• Calibration setup and required tools
• How to apply pressure inputs and measure output signals
• Concept of zero and span adjustment
• When recalibration is required

Applications

• Flow measurement systems in pipelines
• Oil & Gas and petrochemical industries
• Water and wastewater treatment plants
• Power plants and steam systems
• Instrumentation maintenance and calibration
• Industrial process control systems