Instrumentation

In the world of instrumentation, thread connections are a fundamental part of installation, maintenance, and repair. From installing pressure gauges to connecting valves and fixing instruments to pipelines, the correct choice and installation of threads directly impact the seal integrity, safety, and longevity of the system. As an instrumentation engineer, mastering commonly used thread specifications […]

As a vital part of the automation industry, PLC engineers face various challenges during commissioning and troubleshooting in the field. However, due to a lack of experience or simple oversight, engineers often make some reckless decisions that can significantly impact system performance or even cause safety hazards. These “fatal” mistakes can not only prevent smooth

15 Practical Rules Every Instrumentation Engineer Learns on Site In the field of industrial instrumentation, there is a saying many technicians know well: “Three parts theory, seven parts field experience.” You may memorize formulas and understand every detail of instrument principles, but once you arrive at the plant, the real challenge may come from something

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