Power supplies software

The great advantage of installing an ultrasonic system in a PC is that both the hardware (processor, grafics, power supply,. .) aud the software (evaluation and documentation) are directly available for the inspections. 

A Comment about Power Supply Design Software... 

An ESRI system can be built with small modifications of commercial spectrometers by, for example, gradient coils fixed on the poles of the spectrometer magnet, regulated direct current (DC) power supplies, and required computer connections [40,53,55]. Gradients can be applied in the three spatial dimensions, and a spectral dimension can be added by the method of stepped gradients. The spectral dimension is important when the spatial variation of ESR line shapes (as a function of sample depth) is of interest this situation will be described below, in the ESRI studies of heterophasic polymers. In most systems, the software for image reconstruction in ESRI experiments must be developed in-house. 

Power recovery, 20 139-143 Power recovery expander, 22 731 Power recovery systems process flow in, 22 730-731 types of, 22 729-730 PowerSearch software, 28 244, 250 Power semiconductors silicon-based, 22 260-261 silicon carbide in, 22 539-540 Power station design, 20 757 Power supplies... 

Most systems are equipped with power supplies that can be operated in constant voltage, constant current, and constant power modes. Common limits are 30 kV and 300 liA for constant voltage and constant current, respectively. Software-controlled polarity switching and programmable gradients are conveniences. 

Actually, a console to be used with an FFC NMR relaxometer does not differ much from any conventional general-purpose NMR console. With the exception of the relatively simple interfaces controlling the magnet power supply and thus the field, all other hardware units are mostly the same as in any sufficiently versatile NMR spectrometer or relaxometer (what does differ quite a lot, of course, is the application software). 

Initially, the control units were quite clumsy and offered uncountable manipulation options. It was often the case that only physicists were able to handle and use them. With the Introduction of PCs the requirements In regard to the control units became ever greater. At first, they were fitted with Interfaces for linkage to the computer. Attempts were made later to equip a PC with an additional measurement circuit board for sensor operation. Today s sensors are In fact transmitters equipped with an electrical power supply unit attached direct at the atmosphere side communication with a PC from that point Is via the standard computer ports (RS 232, RS 485). Operating convenience Is achieved by the software which runs on the PC. 

An electrophoresis unit (e.g., Multiphor II with MultiTemp III and electrophoresis power supply EPS 3500 XL, Pharmacia Biotech, Freiburg, Germany) and a scanner with software for densitometry (e.g., AIDA, Raytest, Straubenhardt, Germany). 

Confirm power supply voltages and quality are adequate Confirm earthing meets manufacturer s requirements Confirm correct versions of software have been supphed and installed Confirm hard-wired interlocks have been correctly installed... 

Figure 3.4. The overall view of a powder diffractometer. The radiation enclosure is opened to expose the goniometer, which rests on top of the high voltage power supply. The computer on the right is used to manage and control data collection and to carry out preliminary processing of the data, e.g. conversion from a software-specific binary to ASCII format. (Courtesy of Scintag, Inc.) ...

The power supply to the electrolyser was a Model 710 from The Electrosynthesis Company, Inc. of Lancaster NY. It was operated in constant current mode rather than in constant voltage mode. The maximum current and maximum voltage available was 50 amperes and 20 volts, respectively. In addition to current measurement provided by the power supply, a calibrated shunt was connected to the output to allow for independent measurement of current. Voltage taps independently connected to the cell electrodes were connected to the data acquisition system (DAS). The instrument signals from thermocouples, pressure gages, and flowmeters were connected to the DAS, which was comprised of a Dell computer with special acquisition boards and Labview software. Observations and some data were manually recorded in a laboratory notebook. 

CE experiments were performed on a Bekcman P/ACE System 2200, equipped with an autosampler, a temperature-controlled fluid-cooled capillary cartridge, an automatic injector, a power supply able to deliver up to 30kV, and a UV detector. A System Gold Software data system version 810 was used for instrument control and for data acquisition and analysis. The separations were performed using a neutral capillary (eCAP Neutral Capillary, Beckman Instruments) of 45 cm (33 cm to the detector window) x 50 pm internal diameter. This capillary utilizes a secondary layer of polyacrylamide to generate a hydrophilic surface. 

National Instruments (Texas, US) hardware was used to control the valves and stepper motors. A 12 V DC power supply (RS, UK) was used to power the valves. Software to control the valves and stepper pumps was written using National Instruments Lab VIE 5.1. A photomultiplier tube (PMT) was supplied by... 

For ITs driven by a sinusoidal waveform, the superimposition of a dc potential (U) on the main trapping field (Frf) requires the use of an additional dc power supply. However, in the DIT, the dc component can be generated easily by varying the duty cycle of the rectangular waveform through appropriate variation of the parameter values entered into the control software of the mass spectrometer. 

Fig. 1. Prototype thin-film resistive heating PCR thermocycler (TFRT). (I) Overall TFRT design schematic. (II) Schematic and views of the TFRT capillary cartridge assembly. The device components are 4 Thin-film resistive heater B1 and B2fans Cthermocou-ple D PCR capillaries E1 and E2 relays F computer interface 6 control software H power source (batteries or power supply).

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