Category: Data Acquisition

Types of Encoders in Digital Electronics

Types of Encoders in Digital Electronics: By the use of a digital code, it is possible to identify the position of a movable test piece in terms of a binary number. The position is converted into a train of pulses. This is achieved by a digital transducer and is also termed as encoder. Since the […]

Electromechanical AD Converter

Electromechanical AD Converter: Another area of application in which Electromechanical AD Converter is very important, involves the translation of the angular position of a shaft into digital information. (A very common application of this type of conversion is found in large radar installations, where the azimuth and elevation information are determined directly from the shaft […]

Sensors Based Computer Data Systems

Sensors Based Computer Data Systems: This Sensors Based Computer Data Systems describes hardware/software which is commercially available at several levels of completeness, ranging from single board computer “front ends” to stand alone system and high level programming languages. Even the simplest and least expensive devices require considerable electro­nics/computer expertise on the part of the user, […]

Compact Data Logger

Compact Data Logger: Compact Data Logger – A typical unit provides 60 channels of data in a 20 x 40 x 60 cm box weighing about 20 kg. Most manufacturers offer local or remote add-on scanners to expand to about 1000 channels. Scan rates are modest usually (1 — 20 channels per second) and though […]

Data Logger Summary

Data Logger Summary: In general, a data logger is a comprehensive and highly advanced Data Logger Summary. It is made versatile and flexible, to render it suitable for widely varying applications, specific requirements being met simply by setting up a suitable program. It can accommodate from 10 to 1000 analog signals, depending upon the capacity […]

Data Logger Operation

Data Logger Operation: Data Logger Operation – For proper understanding of a Data Logger Operation, it is essential to understand the difference between analog and digital signals. For example, measurement of temperature by a milli voltmeter, whose needle shows a reading directly proportional to the emf generated by the thermocouple, is an analog signal. However, […]

Data Loggers Function

Data Loggers Function: The basic Data Loggers Function is to automatically make a record of the readings of instruments located at different parts of the plant. Data loggers measure and record data effortlessly as quickly, as often, and as accurately desired. Measurement errors are eliminated and the log is permanent in a form most suited […]

DA Converter Working Principle

DA Converter Working Principle: The resistive divider or ladder can be used as the basis for a DA Converter Working Principle. It is in the resistive network that the actual translation from a digital to an analog signal voltage takes place. However, there is a need for additional circuitry to complete the design of a […]

Weighted Converter Using Transistor Switches

Weighted Converter Using Transistor Switches (Current Switch): Figure 17.19 (a) shows a circuit diagram of a weighted converter, using transistor switches. When the D bit is high (logic 1), it produces enough base current to saturate the transistor. When the D bit is low (logic 0), the base current is zero and the transistor remains […]

Digital to Analog Converter Circuit Diagram

Digital to Analog Converter Circuit Diagram: The basic Digital to Analog Converter Circuit Diagram using Op Amp is shown in Fig. 17.18(a). The input signal is applied to the inverting terminal of the opamp. In Digital to Analog Converter Circuit Diagram the input impedance is almost infinity, and almost no current can enter the input […]