Electronic data acquisition

A portable electronic data acquisition system was transported to the plant site and connected to the extruder panel. All available instrument outputs from the panel were connected in parallel with the acquisition system. Data collected included barrel zone temperatures, screw speed, motor current, pressure at the entry to the pump, transfer line temperature, and gear pump temperature. Process data were collected at a frequency of once every five seconds. 

Since particles in the micron and submicron size range are of primary importance, the emphasis in this study is on using the singleparticle light scattering characteristics, and a new optical single-particle ratio counter was improved and calibrated. Furthermore, an electronic data acquisition system was developed, and finally the counter was applied to an in situ, real time study of automobile exhaust gas analysis. 

Electronic Data Acquisition System. Essential for the eflFective use of a MRSPC is an electronic data acquisition system that can interface directly with the photomultipler tubes and automatically detect the particles, calculate the ratios, and store the results. The function of the interface can be divided in two main parts ... 

There are many different types of thermocouples, depending on the temperature range needed. Table 5.1 shows the common thermocouple types and the alloys used in each. Each combination generates a specific millivolt output as a function of temperature. These millivolt reference tables are based on some reference junction temperature which is usually 0°C. Most electronic data acquisition systems have these tables built into the software, usually through a curve fit of the data, so the millivolt readings are automatically converted to temperature. For best accuracy, a thermocouple with the appropriate range should be used for the expected temperatures. For example, type T thermocouples are typically used for lower temperature measurements such as the water temperature in a cooling system. In industrial combustion. Type J and K thermocouples are commonly used to measure intermediate temperatures, such as the temperature inside a refractory wall or temperatures inside a burner. Type... 

In contrast to FIA where manual operation of pump and valve is easily achieved, the fundamental requirement for success in SIA is the accurate and precise synchronization of pumps, valves, and other hardware to obtain reproducible flow patterns. This, together with the benefits of electronic data acquisition and manipulation, necessitate the development of specialized software for overall instrument control. It has been noted that the lack of commercially available software was the most limiting factor in the development of SIA. In most cases specific in-house programs have been developed to be compatible with the instrumentation available and software written in Turbo C -I- -f-, Visual Basic, Basic, the Windows 95 environment, and LabVIEW has been reported. Although recently commercially available software has become more widely available and the need to design purpose-built software has been lessened, some of this is instrument specific and many researchers choose to develop their own to suit the available components. 

MS is one of the main techniques used in chemical analysis nowadays [23-28]. Due to its capabilities in molecular identification and structure elucidation, as well as high sensitivity [29], it has already enabled important discoveries in chemistry and the biosciences. A mass spectrometer consists of three main parts an ion source, a mass analyzer, and a detector (Figure 1.1). They are supplemented with a number of auxiliary components, including interfaces for sample pre-processing and introduction, ion optic elements for manipulating ion beams, and electronic data acquisition systems. 

Real-time measurement of the structural response was achieved by using an electronic data acquisition system. Several instruments were used to monitor the specimen behavior linear variable displacement transducers (LVDTs) to monitor the global deformed shape and the joint panel shear strain a potentiometer on tip beam to monitor the actual displacement imposed by the actuator to the specimen strain gauges on internal steel rebars to record their strains at ends of beam and columns and strain gauges on CFRP quadriaxial sheet along fibre directions to monitor FRP strains at joint panel. 

Electronic data acquisition systems (DAS) allow real-time monitoring of all process variables and pertinent product dimensions... 

Once the equivalent circuit model is validated, the electronic data acquisition system has to be designed to perform the frequency sweep and capture the data. This is often a complex and time-consuming activity, requiring significant electronic skills to optimize the electronic-circuit designs. 

The third generation PSIT built at PNNE was based on Finnigan s LCQ ion trap. This ion trap MS technology represented advances of 10 years in electronics, data acquisition and RF... 

Electronic Data Acquisition System—Any data acquisition and integration device used for quantitation of these analyses must meet or exceed these minimum requirements ... 

The sensor is a thin-film galvanic device consisting of two dissimilar metals (e.g., cadmium-gold) connected through an electronic data acquisition system via a zero-resistance ammeter. The data acquisition unit can store and transmit the information either through electrical transmission lines or through a radio transponder. 

---