Interrupts are a crucial feature in Programmable Logic Controllers (PLC), designed to manage high-priority tasks in real-time control systems. They play a vital role in enhancing the efficiency and responsiveness of a PLC by allowing it to handle critical events immediately. This article will discuss the concept of interrupts in PLC, why they are used, […]
Introduction to Interrupts in PLC Systems Read More »
In Distributed Control Systems (DCS), the concept of an alarm deadband (also known as alarm hysteresis or alarm differential) refers to a predefined range around an alarm setpoint where small fluctuations in the measured value do not trigger multiple alarms. This mechanism is essential in preventing alarm systems from constantly sounding due to minor, insignificant
What is DCS Alarm Deadband and Its Purpose? Read More »
Have you ever compiled your own instrument repair experience? Or is your summary incomplete? Here are 60 important tips to pay attention to during the process of instrument maintenance and repair. Consider this your comprehensive guide! Part 1: General Guidelines and Safety Measures (Tips 1–15) Do not mix signal cables with power supply cables in
60 Practical Tips for Instrument Maintenance and Repair Read More »
Introduction: The side-mounted magnetic flap level gauge is an instrument used to measure liquid level height, typically composed of a magnetic flap, float, measurement tube, etc. The side-mounted magnetic flap level gauge has the advantages of a simple structure, easy installation, and maintenance. It is widely used in chemical, petroleum, pharmaceutical, and other industries. This
In engineering flow measurement, accurate measurement is key to ensuring production safety and efficiency. However, achieving high-precision measurements under varying operating conditions remains a pressing challenge. This article briefly analyzes the requirements for temperature, pressure, or density compensation in flow meters, and outlines temperature and pressure compensation strategies based on the characteristics of liquids, gases,
Seven Key Points for Electromagnetic Flowmeter Selection: Accuracy and Functionality: Choose the appropriate accuracy level based on measurement needs, and consider necessary functions such as bidirectional measurement or alarms. Flow Rate and Diameter: Determine the fluid’s flow rate range and select the proper sensor diameter to ensure measurement accuracy. Fluid Properties: Consider the fluid’s conductivity,
The proper operation of the electromagnetic flowmeter Read More »
The storage and handling of high-temperature and corrosive substances have always been one of the challenges in measurement technology. Especially in the energy, chemical, and metal processing industries, high-temperature molten salt, as an important heat carrier and chemical reaction medium, the accurate measurement of its level plays a crucial role in ensuring production safety, improving
Simple analysis of the measurement of high-temperature molten salt by radar level gauge Read More »
I. Working Principle The ultrasonic level gauge is an instrument that measures the height of liquid by utilizing the reflection principle of ultrasonic waves. It is mainly composed of an ultrasonic transducer (probe), an electronic processing unit, and a display unit. When the instrument is in operation, the ultrasonic transducer emits ultrasonic waves of a
The working principle of ultrasonic level gauge and the causes of faults Read More »
As shown in Figure 1, the upstream pressure tapping point is located 25.4 mm from the upstream face of the orifice plate, and the downstream pressure tapping point is also located 25.4 mm from the downstream face of the orifice plate. When using flange pressure tapping, the pressure tapping flange is included as part of
Flange Pressure Tapping for Orifice Plate Read More »
