Pressure sensors play a critical role in industrial applications. In real operating environments, their performance can be affected by multiple interference factors, and in severe cases, the sensor may even be damaged. Therefore, quality testing is essential. The evaluation can be divided into two major aspects: interference immunity and measurement accuracy. 1. Interference Immunity Tests […]
How to Test the Quality of a Pressure Sensor Read More »
1. Introduction In industries such as energy, chemical processing, and food production, accurate fluid measurement is critical for process control, fiscal metering, and safety compliance. The Roots flow meter, also known as the lobed gear meter, is highly regarded for its precision in measuring high-viscosity fluids. However, its mechanical accuracy must be maintained through regular
Calibration and Verification of Roots (Lobed Gear) Flow Meters Read More »
1. Purpose & Scope This guide defines what to check during routine field rounds and system checks for instrumentation in chemical plants. The goal is to detect abnormalities early, prevent trips/incidents, and ensure on‑spec product quality. 2. Core Tasks of Inspection Identify abnormal instrument conditions promptly and address them before they cause unit shutdowns, safety
Chemical Instrumentation Inspection Guide Read More »
1) Define the Duty (Process Requirements) Maintain temperature (Tₘ): e.g., anti-freeze (>0 °C) or process hold (50–100 °C). Max exposure temperature (Tₑₓₚ): abnormal heat, upset, or external sources. Select jacket & cable class with T rating ≥ Tₑₓₚ. Recommended cable type by duty Self-regulating (SR): maintain ≤ ~130 °C; auto-throttles output, safer on overlaps. Constant-watt
Heat-Trace Cable Selection Guide Read More »
1) Concept & Scope Interface level means the height of the boundary between two immiscible liquids of different densities (e.g., oil–water). A dual-flange remote-seal differential pressure transmitter infers the interface height from the pressure difference created by the two liquids across the measurement span. Typical uses: separators, coalescers, desalters, and oil–water interface tanks. 2) Media
Interface Level Measurement with Dual-Flange DP Transmitters — Practical Notes Read More »
Introduction When selecting, using, or maintaining an industrial instrument, it is essential to understand the quality indicators that define its performance. The six most common indicators are: Accuracy Hysteresis (Backlash/Variation) Sensitivity Dead Zone Stability Response Time These parameters are the foundation for evaluating whether an instrument meets the requirements of industrial processes. 1. Accuracy Accuracy
Six Key Indicators That Determine Instrument Quality Read More »
A city centralized heating system consists of four main parts: heat sources, heating networks, heat exchange stations, and various forms of heat users. This system supplies effective heat through centralized heat sources, using hot water or steam as the transmission medium via heating networks, meeting the heating demands of an entire region or city, including
Application of Electromagnetic Flow Meters in Heat Exchange Station Automation Systems Read More »
Purpose. This note summarizes why interlock functions may mis-actuate or fail to act, and what to do about it—covering instruments, logic design, installation/maintenance, and people/process. 1) Instrument-Related Factors Quality & accuracy. Low-cost, mixed-quality instruments degrade stability/accuracy and raise the risk of spurious trips and nuisance alarms when used as interlock initiators. Aging & wear. Sensing
Analysis of Factors Affecting Interlock Action Reliability Read More »
0) Summary (for busy engineers) Common symptoms in large‑bore steam service: zero drifting, negative oscillation, large bias. Root causes: poor straight‑run, wrong cross‑section position, two‑phase effects, impulse/condensate handling, orientation error. With correct siting, impulse design, and anti‑interference measures, ±2.5% is achievable in real plants. 1) Straight‑Run Requirements Goal: let the velocity profile re‑develop into a
Averaging Pitot Tube (APT) Flow Meter — Installation Essentials (Part 1) Read More »
1. Core Competencies 1.1 Technical Expertise Electrical Knowledge: Strong foundation in circuit theory, motor control, and power distribution systems. Instrumentation & Automation: Proficiency in sensor principles, PLC programming, and DCS operation. Testing & Calibration Tools: Skilled in using multimeters, oscilloscopes, and signal generators for equipment commissioning and parameter calibration. 1.2 Safety and Compliance Electrical Safety
