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1. Overview
The Arachnid Labs Re:load Pro is a versatile and robust constant cur-
rent active load intended for testing power supplies, batteries, and other
current-supplying electronic equipment. It can also be used for other ap-
plications in which excellent current regulation is required, such as elec-
troplating.
Features of the Re:load Pro:
• Active load with real-time analog current feedback loop.
• Dissipates 25 watts continuously, or more for short periods.
• Handle up to 6 amps, and 0-60 volts.
• Easy to use and intuitive user-interface.
• Current adjustable with milliamp precision over the whole range.
• Protection against overcurrent, overvoltage, overtemperature, ESD
and reverse polarity.
• Power supplied over USB from either a computer or a USB charger.
• Fully isolated USB interface. Your computer is isolated from any
direct interaction with dangerous voltages and currents.
• Fully controllable over USB, with monitoring functionality.
• Congurable display, showing voltage, current, power, resistance,
and total energy dissipated.
• Open Source, with a USB bootloader, so rmware can be modied
and upgraded without expensive development tools.
The Re:load Pro was made possible by the generous support of 361 back-
ers on Kickstarter.
2. Calibration
Before initial use, calibrate the Re:load Pro. The calibration procedure re-
quires test leads, a power supply capable of supplying at least 2 amps DC,
and a current meter, either integrated into the PSU or discrete.
1. Detach all test leads.
2. Press in the knob to display the menu. Rotate the knob clockwise until
‘Calibration’ is selected. Press the knob again to select Calibration
mode.
3. The display will show “Remove Leads”. Press in the knob to perform
