B&K Precision 1735A Single Output DC Power Supply, 4 Digit LED Display, 0-30 V Output Voltage, 0-3 A Output Current

" This B&K Precision single-output linear DC power supply unit provides a constant source of DC voltage for powering and testing electronic devices in research and development, production, and laboratory applications. The power supply unit (PSU) has one output that provides adjustable DC voltage and current. Two LED screens show voltage and current readings simultaneously and are readable in low light. The output current can be adjusted using the fine and coarse control knobs on the PSU's front panel. Two PSUs can be connected in series to supply more voltage, or they can be connected in parallel to supply more current. A cooling fan helps prevent overheating, and built-in overload and reverse-polarity protection helps prevent damage to the PSU and the device under test. This B&K Precision power supply unit is offered with a choice of rating voltage and current, and weight. Specifications Number of outputs 1 Load regulation Less than or equal to 0.01% of voltage reading + 3mV (millivolts); less than or equal to 0.2% of current reading + 3mA (milliamp) Line regulation Less than 0.01% of voltage reading + 3mV; less than or equal to 0.2% of current reading + 3mA Ripple and noise Less than or equal to 1mV RMS (root mean square) Ripple current Less than or equal to 3mA RMS Recovery time Less than or equal to 100 μs (microseconds) Meter range Voltage: 0 to 99.99V; Current: 0 to 9.999 amp Meter accuracy + or – (0.5% of reading + 9 digits) Power requirements 120VAC at 60Hz Operating temperature and humidity 32 to 104 degrees F/0 to 40 degrees C, less than or equal to 75% relative humidity Dimensions 158 x 140 x 318mm/6.2 x 5.5 x 12.5 inches (H x W x D) H is the vertical distance from lowest to highest point, W is the horizontal distance from left to right, and D is the horizontal distance from front to back. Power supply units (also known as PSUs, AC power supplies, DC power supplies, and battery eliminators) provide AC or DC voltage to power or test devices such as tools, appliances, and electronic components. The PSU draws energy from a line source such as a wall socket and converts it to a constant, specified amount of voltage or current that is then outputted to a connected device. In general, a power supply unit will be classified as either a linear PSU (also known as a linear regulation or line-frequency PSU) or a switched PSU (also known as a switching-mode power supply, SMPS, or switcher). Typically, a linear PSU has a simpler design and provides a faster transient response time and less electrical interference and noise than a switched PSU. A switched PSU is often smaller, lighter, and more efficient than a linear PSU and generates less heat. The transient response time of a PSU indicates how quickly the PSU can resume the desired constant output after a sudden change in input. Ripple voltage or current indicates how much unfiltered noise and AC voltage or current is present at the output of a filtered power supply operated at full load. The temperature coefficient is the percent average change in output voltage per degree centigrade of change in ambient temperature. Fuses, current limiters, and other forms of overload protection can be built into the PSU to help protect against voltage spikes or short-circuiting. B&K Precision manufactures test and measurement instruments for research and development, production-line testing, and electronic field service applications. The company, founded in 1951, is headquartered in Yorba Linda, CA. It meets International Organization for Standardization (ISO) standard 9001:2008 and is compliant with Restriction of Hazardous Substances (RoHS) and waste electronic and electrical equipment (WEEE) directives. "