Instrumentation

In discussions about plant safety, you might hear terms like “alarms, interlocks, and safety valves.” However, true safety assessment goes beyond simply asking, “Do we have these systems?” It involves answering three crucial questions: What potential issues could occur? (Scenario Identification) Is the risk low enough? (Risk Assessment) If not, how reliable do the protection […]

Key Factors for Thermocouple Selection (Prioritized) Temperature Range (Primary Consideration) The temperature range determines the selection of the thermocouple type. The type should cover 1.2 times the maximum temperature (JB/T 5582-2015): Ultra-Low Temperature (-270 to -40°C): Type T (Copper-Copper Nickel), high precision for low temperatures. Low Temperature (-40 to 400°C): Type T (stable) and Type

An actuator’s dead zone refers to the range of input signals where the actuator does not respond. Only when the input signal reaches a certain threshold does the actuator begin to operate. When the dead zone becomes too significant, it may lead to oscillations in the control system, degrading the system’s performance. In industrial automation

Properly setting alarm values can prevent safety accidents. So, how should we set these alarm values? For example, consider a tank with a level control limit of 80%. What would be the appropriate alarm value? 70%? 75%? Or 78%? To correctly set alarm values, we first need to understand one key concept: response time. The

In a Distributed Control System (DCS), deadband (also known as hysteresis) refers to a specific range configured around an alarm setpoint. Within this range, minor fluctuations of a process variable will not trigger an alarm, even as they approach the alarm limit. The deadband acts as a “no-alarm zone,” effectively preventing the frequent generation of

In modern industrial and home automation, relays play a crucial role by responding to electrical signals to open and close contacts, thus enabling the control of electrical circuits. Relays are essential components that ensure the smooth operation of complex systems, providing safety, efficiency, and reliability. For anyone working in automation systems, understanding the various types

Process engineers often compare the inlet and outlet flow rates of equipment, devices, or pipelines to ensure the stability, safety, and efficiency of production. The key reasons for this practice can be explained from the following perspectives: 1. Verifying Material Balance to Ensure Process Stability In industrial production, the input-output-accumulation of materials in equipment or

Electrical components are the fundamental building blocks of any electronic circuit. Each component serves a specific function to ensure the proper operation of the system. Understanding the most common electrical components and their roles is crucial for anyone interested in electronics, engineering, or automation. Below, we will introduce some of the most widely used electrical

In the design and commissioning of industrial equipment, the following situations are often encountered: A buzzing sound when equipment is running Sudden, intense vibrations of cutting tools during machining Increasing loosening of motor bases over time Cracks appearing in pump machines after a few years of operation The root cause? Insufficient damping. Many people only

In areas with acid and alkali corrosion, instrument air supply lines (compressed air pipelines) are prone to damage due to acid mist, splashes, or volatile gases, leading to gas leaks, contamination, and affecting the normal operation of instruments. Protective measures must be taken in terms of material selection, pipeline protection, installation layout, and maintenance. These