Power supply for

The HILL-SCAN 30XX boards can be used in different PCs. Desktop- and tower-PCs as well suited for laboratory uses. For in-field inspections rugged notebooks and portable PCs are advantageous. A typical portable system is shown in Fig. 2 (USPC 3010), used in MUSE (Mobile Ultrasonic Equipment). This portable PC not only contains the boards for ultrasonic testing but also a controller with power supply for stepper motors, so that a manipulator can be connected directly. The MUSE system is enlarged with a water circulation system which enables a local immersion technique" for in-field inspections. A typical result is shown in Fig. 3, which presents a D-scan of a CFRP- component in RTM-techniques. The defect area caused by an impact is clearly indicated. The manipulator is described in [3]. [Pg.859]

The basic instrumentation for capillary electrophoresis is shown in Figure 12.41 and includes a power supply for applying the electric field, anode and cathode compartments containing reservoirs of the buffer solution, a sample vial containing the sample, the capillary tube, and a detector. Each part of the instrument receives further consideration in this section. [Pg.601]

Power Supplie.s Iligh-voltage ac and dc power supplies for electrostatic separators are iisiiallv of solid-state construction and feature variable outputs ranging from 0 to 30,()()() for ac wiper transformers to 0 to 60,000 for the dc supply The maximum current requirement is approximately 1,0 to 1,5 rnA/rn of electrode length. Powder supplies for industrial separators are typically oil-insulated, but smaller diw-epoxv-insulated supplies are also available. [Pg.1805]

This converter is intended to function as a bulk power supply for a distributed system. It has only one +28VDC output at 10 A. This is going to be a classic ZVS quasi-resonant half-bridge converter that is, variable frequency, voltagemode controlled with averaging overcurrent protection. It is representative of the designs using the available control ICs on the market today. [Pg.176]

Extent of emergency power supplies for lighting, communication systems, and key items of equipment (e.g. cooling facilities, reactor agitators, exhaust ventilation) and instruments/alarms. [Pg.406]

Uninterrupted power supply for computers, initially only for central units, grew significantly with the introduction of personal computers (PCs) the batteries became smaller and, since they had to be located in offices, had to be in a sealed version, since no aggressive charging gases were permitted to escape. This advanced the breakthrough of the development of so-called recombination or valve-regulated... [Pg.255]

The photometer is adequately described in Figure 3-2. In the phosphor-photoelectric detector (2.10), the x-ray beam strikes a silver-activated zinc sulfide phosphor to produce blue-violet light that is changed by the multiplier phototube (Type 931-A) into an electric current that is amplified and read on a suitable micro- or milliammeter. A stable power supply for both x-ray tube and detector circuit are essential, as is clear from the circuit diagrams.10... [Pg.73]

Fig. 3-2. A, Phosphor-photoelectric detector B, sample cell C, sample D, CA-5 x-ray tube and housing E, milliammeter F, amplifier and rectifier vacuum tubes G, regulated power supply for amplifier tubes and multiplier phototube H, control panel.

Possibilities for Enzymes in Implantable Fuel Cells There is significant and increasing demand for power supplies for implantable medical devices, including continuous glucose monitors for diabetic patients, thermal sensors for... [Pg.621]

Zinc is commonly used as an anode in metal-air batteries. Zinc-air batteries are commercially available and used as power supply for navigation buoys, communication systems, hearing aids, and etc. [2], Mechanically rechargeable Zn-air batteries are developed recently for traction [3],... [Pg.126]

The task is daunting—a typical switching power supply, for all its apparent simplicity (at least in terms of the typical number of components on the board), probably constitutes one of the most difficult challenges of modern electronics. A simple symptom such as an overheated or unreliable transistor switch may rack the brains of even an experienced... [Pg.24]

The engineer wanted to know what should be the minimum rating of the bench power supply for a Buck application with 5V at the input and 3.3V of output, delivering 1A of load current. I think his question initially arose because he was trying to make a small converter powered off a USB port for driving a peripheral device. He was worried how the current limit of the USB port was going to affect the load current he could draw. [Pg.66]

Commercially available combustible gas detection systems generally use 24 VDC as the power supply for field devices. 24 VDC is inherently safer and corresponds the voltages increasing used by most instrument systems in process areas. A main supply voltage converter can be used to step down or convert from AC to DC power supplies. [Pg.191]

Constant current electrolysis is an easy way to operate an electrochemical cell. Usually, it is also applied in industrial scale electrolysis. For laboratory scale experiments, inexpensive power supplies for constant current operation are available (also a potentiostat normally can work in galvanostatic operation). The transferred charge can be calculated directly by multiplication of cell current and time (no integration is needed). [Pg.35]

A new type of power supply for electric cars eliminates the need for recharging. A fuel cell is a battery that produces electricity while reactants are supplied continuously from an external source. Because reactants continuously flow into the cell, a fuel cell is also known as a flow battery. Unlike the fuel supply of a more conventional battery, the fuel supply in a fuel cell is unlimited. As in the combustion of gasoline in a conventional engine, the overall reaction in a fuel cell is the oxidation of a fuel by oxygen. [Pg.550]

The voltage and current of a transfer are determined by the power conditions set on the power supply for the transfer and the resistance of the circuit (basically the buffer). As the buffer breaks down, its resistance drops. If the power or voltage is set to be constant, the current will increase as the resistance drops, resulting in heating. However, if the current is held constant, and the resistance drops, so will the power and the voltage, causing the proteins to transfer more slowly. [Pg.207]

A more recent paper considered the use of a hybrid power supply for powering autonomous microsen-sors. ° Such devices are similar to the dust mote pictured in Figure 1 and described in the Introduction. This hybrid power supply combined a solar cell to meet standby requirements and to charge the battery, which was the microfabricated Ni—Zn battery described in section 3.2. The authors also showed that if the battery alone was to serve as the power source, the footprint would be substantially larger, over 12 cm . The hybrid device was constructed and some feasibility experiments were carried out, but no actual devices were powered. [Pg.235]

The actuator and power supply for any depressuring valve with a double action or an energize to open actuator that may be exposed to fire should be fireproofed for a minimum of 15 minutes, per the UL 1 709 high rise fire test. Fireproofing of the actuator and power supply is not required with the fail-open design. [Pg.126]

The electrolyte is very conductive. In my example of 7 separate containers wired in series, there s no charge applied to the middle ones either because they are in series If you wire 7 resistors in series you have 1/7th of the total voltage across each resistor. I wanted to get about 2V dc per cell, and with 7 cells you can use a 14V dc power supply (for example a battery charger). You could scale up to any number of plates, but the voltage across the stack would be higher. If 7 cells produce 7 units of gas with a given current then 100 cells would produce 100 units of gas with the same current, but the voltage across the whole stack would need to be about 2V multiplied by the number of cells. Thus the power consumption increases approximately linearly with the number of plates. [Pg.39]

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