For multi-channel data acquisition devices the sample rate is typically given as the speed of the analog-to-digital converter(A/D). The speed is normally expressed in samples per second. The speed at which a data acquisition system collects data. RS485 is not as popular as RS232, however, it is more flexible in that it supports communication to more than one device on the bus at a time and supports transmission distances of approximately 5,000 feet. RS232 is the most common serial communication, however, it is somewhat limited in that it only supports communication to one device connected to the bus at a time and it only supports transmission distances up to 50 feet.Ī standard for serial communications found in many data acquistion systems. For example, a system has 12-bit resolution, one part in 4,096 resolution, and 0.0244 percent of full scale.Ī standard for serial communications found in many data acquistion systems. Resolution can be expressed in bits, in proportions, or in percent of full scale. The smallest signal increment that can be detected by a data acquisition system. Also called IEEE 488 in reference to defining ANSI/IEEE standards. Synonymous with HPIB (for Hewlett-Packard), the standard bus used for controlling electronic instruments with a computer. Data acquisition devices have either single-ended or differential inputs, many devices support both configurations. Differential inputs have a unique high and unique low connection for each channel. Refers to the way a signal is wired to a data acquisition device. Digital I/O are also referred to as binary I/O. These states may be on/off, high/low, 1/0, etc. Digital I/O are discrete signals which are either one of two states. Refers to a type of data acquistion signal. The analog-to-digital converter is the heart of most data acquisition systems.Īn electronic component found in many data acquistion devices that produce an analog output signal. Equipment ranges from simple recorders to sophisticated computer systems, or even smart phones turned into portable data acquisition systems.ĭata acquisition products serve as a focal point in a system, tying together a wide variety of products, such as sensors that indicate temperature, flow, level, or pressure.Īn electronic device that converts analog signals to an equivalent digital form. In the simplest form, a technician logging the temperature of an oven on a piece of paper is performing data acquisition.Īs technology has progressed, this type of process has been simplified and made more accurate, versatile, and reliable through electronic equipment. Data Acquisition Introduction to Data Acquisition Systemsĭata acquisition systems, as the name implies, are products and/or processes used to collect information to document or analyze some phenomenon.
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