This Instek PSW series single-output programmable switching DC power supply unit provides a constant source of DC voltage and current for powering and testing electronic devices. The power supply unit (PSU) has one output that supplies constant power output for multiple voltage and current ranges. The LCD shows the voltage and current reading simultaneously, and the display is readable in low light. Up to two PSUs can be connected in series for more voltage, and up to three PSUs can be connected in parallel for more current (connection cables sold separately). The constant current/constant voltage priority feature helps prevent damage to the device under test due to current spikes, such as in applications with LEDs and batteries. An adjustable slew rate controls the rise and fall time of the output voltage or current to help prevent damage to the device under test. The PSU has a USB and LAN interface for connecting to a computer (USB cable included) for remote control. Software download is included for remote control and testing applications. An analog control input on the rear panel allows the PSU to be controlled by an external device. A power cord with a three-prong plug is included for connecting the PSU to a grounded outlet, and test leads are included. Also included is a basic accessories kit with nuts, screws, washers, an air filter, an analog protection dummy, and an analog control-lock lever, for maintaining and setting up the PSU. A built-in cooling fan helps prevent overheating. Overcurrent and overvoltage protection help prevent damage to the PSU and the device under test. This Instek PSW power supply unit is offered with a choice of rating current and voltage, ripple and noise characteristics, resolution and accuracy, response time, and weight and dimensions.

Specifications

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.

GW Instek manufactures test and measurement equipment such as oscilloscopes, spectrum analyzers, signal testers, and video surveillance systems. The company, founded in 1975 and headquartered in Taipei, Taiwan, meets International Organization for Standardization (ISO) standards 9002 and 14001.

What's in the Box?

• Instek PSW series power supply unit
• (1) GTL-123 test lead
• (1) GTL-240 USB cable
• PSW-004 basic accessories kit
• Programmable user manual CD
• Power cord
• Instructions