Keithley 2231A-30-3The Keithley 2231A-30-3 Triple Channel DC Power Supply can output a total of 195W of power, providing the power levels needed to energize a wide range of circuits and devices for benchtop work. Two channels can supply up to 30V at 3A each; the third channel can provide up to 5V at 3A. The Model 2231A-30-1 does not compromise on performance or convenience features, offering the versatility and ease of use you need, so it can be the only DC power supply on your bench.The 2231A-30-3 is a linear-based design with less than 5mVp-p noise per output. Voltage and cur settings have basic accuracies of 0.06% and 0.2% respectively. The load voltage and load cur readback results provide the same levels of accuracy, so you can be confident you are sourcing accurate, low noise voltages and curs to your device-under-test (DUT).Each output of the Model 2231A-30-3 is fully programmable and can be turned on and off independently from the other channels; it essentially provides three power supplies in one instrument. You can power up both the analog circuitry and the digital circuitry of a printed circuit board or a complete device, all with the same instrument.Each output can power a circuit on a diffe ground reference. The low connection on each output is not connected to any of the other outputs. That means one supply can test three separate circuits on three diffe ground references or can power circuits that are transformer or optically isolated from each other. Furthermore, all outputs are not referenced to ground, so the Model 2231A-30-3 can power both floating circuits and grounded circuits.Because the Model 2231A-30-3’s outputs are isolated, one output can be turned effectively into a negative source by connecting its high terminal to the common reference point of a bipolar circuit. A second output can connect its low terminal to the same common reference point. The result is a positive output and a negative output. If the two 30V channels are used in this configuration, both outputs can be changed at the same time by using the Model 2231A-30-3’s tracking function. That allows varying both channels at the same time while keeping their outputs at identical magnitudes.When the application requires outputting more than 30V or 3A, the two 30V channels can be combined to double the output level. Wire the two outputs in series to deliver up to 60V or wire them in parallel to deliver up to 6A. For your convenience, the Model 2231A-30-3 display will read the total output, either voltage or cur, to eliminate confusion. Also, the supply controls both outputs to deliver the required voltage or cur. There’s no need to set up each channel individually; the supply manages the channels for you, so combining channels is uncomplicated.Features and specifcations of the Keithley 2231A-30-3 Power Supply include:

• Voltage: ≤0.02% + 4mV
• Cur: ≤0.2% + 3mA

• Voltage: ≤0.02% + 4mV
• Cur: ≤0.2% + 3mA

• Voltage: ≤1mVrms/≤5mVp-p
• Cur: ≤6mArms

• Voltage: 10mV
• Cur: 1mA

• Voltage: ≤0.06% + 20mV
• Cur: ≤0.2% + 10mA

• Voltage: 10mV
• Cur: 1mA

• Voltage: ≤0.06% + 20mV
• Cur: ≤0.2% + 10mA

• Tracking Mode: Maintains the ratio on the two 30V output channels that is present when the control is activated.
• Combination V1 + V2 Series Mode: Deliver up to 60V when CH1 and CH2 are wired in series. Meter reads back combined voltage.
• Combination I1 + 12 Parallel Mode: Deliver up to 6A when CH1 and CH2 are wired in parallel. Meter reads back combined cur.

• Keithley 2231A-30-3 - Datasheet (493 kB)