Post Tagged with: "control"

Condensate polishing system

Condensate polishing system

Hơi - Nước, Nhà máy Nhiệt điện 23 Tháng Sáu, 2014 at 6:01 chiều

Meaning of condensation water: The condensation water generally refers to the water cooled and condensed through circulating cooling water after work is done by turbine for the steam generated from boiler. In fact, the condensation water in the hot well of condenser also includes the drain (the drain refers to the water condensed after feed water enters into heater andRead More

pH Measurement

pH Measurement

Basic, Instrumentations 18 Tháng Sáu, 2014 at 4:51 chiều

pH measurement has a wide variety of industrial applications in virtually every industry. These range from water conditioning to specific process related measurements to waste treatment. Bài viết này sẽ giới thiệu sơ lược về phương pháp điện hóa là phương pháp sử dụng công cụ mà chuyển đổi đại lượng pH (độ hoạt động của ion H+) thành tínRead More

What does PLC consist of?

What does PLC consist of?

Controls, PLC 13 Tháng Sáu, 2014 at 12:57 chiều

A typical PLC can be divided into parts, as illustrated in Figure 8 which are Central Processing Unit (CPU) Input/output (I/O) Power Supply Programming Device We shall briefly discuss each part here. Central Processing Unit (CPU) The processor (CPU) is the “brain” of the PLC. A typical processor usually consists of a microprocessor for implementing the logic and controlling theRead More

Why Use PLC?

Why Use PLC?

Controls, PLC 13 Tháng Sáu, 2014 at 12:49 chiều

The softwiring advantage provided by programmable controllers is tremendous (Figure 5 shows a practical industrial example). In fact, it is one of the most important features of PLCs. Softwiring makes changes in the control system easy and cheap. If you want a device in a PLC system to behave differently or to control a different process element, all you haveRead More

What is a PLC?

What is a PLC?

Controls, PLC 13 Tháng Sáu, 2014 at 12:34 chiều

Programmable logic controllers (shown in Figure 1) are now the most widely used industrial process control technology. A programmable logic controller (PLC) is an industrial grade computer that is capable of being programmed to perform control functions. The programmable logic controller is designed for multiple input and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibrationRead More

Difference between PLC,DCS & SCADA

Difference between PLC,DCS & SCADA

Controls, DCS, PLC, SCADA 13 Tháng Sáu, 2014 at 12:19 chiều

In the past the strength and weakness of both the automation technologies were well understood. So it was easy for engineers to select the one that suits their application, but now due to the advent of microprocessors both the technologies are merging.The requirements which are thought to be exclusive to one technology can be found in the other one too.ButRead More

How to read P&ID (Piping and instrument diagram) & PFD (Process flow diagram).

How to read P&ID (Piping and instrument diagram) & PFD (Process flow diagram).

Instrumentations 10 Tháng Sáu, 2014 at 4:45 chiều

P&ID: – Schematic illustration of instruments and their interconnection is called P&ID. – Sơ đồ minh họa thể hiện các thiết bị đo và những đường ống, kết nối liên kết với nó gọi là bản vẽ P&ID PFD: Process flow diagram. PFD gives an overview of the plant process. PFD is a simplified version of P&ID. – Mô tảRead More

Documents and drawings, which is essential for instrumentation engineer.

Documents and drawings, which is essential for instrumentation engineer.

Instrumentations 10 Tháng Sáu, 2014 at 12:11 chiều

As an instrumentation engineer, one must be familiar with the following documents and drawings. Nếu là một người kỹ sư đo lường, bạn cần phải thông thuộc và nắm bắt các tài liệu và bản vẽ sau: Document/Tài liệu: Instrument index, Instrument list – Danh mục các thiết bị đo Instrument data sheet – Bảng số liệu kỹ thuật thiếtRead More