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The Bio-Rad PowerPac 3000 Power Supply is designed to provide a constant current, voltage and electrophoresis applications ideal for DNA sequencing 

Features: 

- Constant voltage, constant power, or constant current operation with automatic crossover.
- Continuous, timer, or volt-hour control.
- I.E.C. 1010 international safety certification.
- Automatic detection of no-load, rapid change in resistance, arcing, short circuit, and ground leakage.
- Backlit LCD graphics display.
- Stackable case.
- Viewing angle adjustment provided by two position leg.

Specifications:

- Electrical requirements: 20 V DC to 3000 V DC; fully adjustable in 1 V steps
- Ripple: PowerPac 1000: ±1% at 1000 V and 250 W
- Line Regulation: PowerPac 1000: ±1% at 1000 V and 225 W from 90 - 132 V AC and 198 - 264 VAC
- Load Regulation: PowerPac 1000: ±1% at 1000 V for a 50% change in output load
- Drift: PowerPac 1000: ±0.5% after a 30 minute warm-up at 1000 V and 225 W
- Noise: 35 dBA