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The B&K Precision 9130 triple-output programmable linear DC power supply unit provides a constant source of DC voltage for powering and testing electronic devices. The power supply unit (PSU) has two outputs that each provide DC voltage up to 30V and current up to 3 amp. A third output supplies DC voltage up to 5V and current up to 3 amp. All three outputs are fully floating and have adjustable voltage and current output, and each output can be adjusted independent of the others. The three outputs are electronically isolated, and the display shows voltage and current readings for all outputs simultaneously. The outputs can be connected in series to supply more voltage, or they can be connected in parallel to supply more current. The PSU's internal memory can store up to 50 operating states for future recall. The PSU can be connected to a computer using a USB-to-TTL serial converter cable (cable included), and it can be controlled remotely with Standard Commands for Programmable Instruments (SCPI). Software is included for testing applications and for emulating the PSU's front-panel controls. The unit's vacuum fluorescent display (VFD) is readable in low light. The PSU can sit on a workbench or be mounted in a rack (mounting hardware sold separately). A power cord with a three-prong plug is included for connecting the PSU to a grounded outlet. The PSU has a removable handle for carrying or for propping up the meter during use. A built-in cooling fan helps prevent overheating, and a 3.15-amp or 6.3-amp fuse turns off the unit in case of overload, helping to prevent damage to the PSU and the device under test.