B&K 1652, 1651A instruction manual

_______________________________________________________________________________________APPLICATIONS

Identical Positive and Negative Voltages With a Separate Common (Refer To Fig. 15)

Another typical “split supply” application is when a circuit uses operational amplifiers (op-amps). Typically, identical positive and negative voltages are required to power op-amp circuits. Using both supplies and the series tracking mode of operation, identical positive and negative voltages with a separate common are obtained as follows:

1.Select the Tracking Series operating mode and set A/B Metering switch to monitor the “A” supply.

2.Set the desired voltage using the “A” VOLTAGE controls.

3.Connect a ground wire between the “A” supply negative terminal and the GND (green) terminal.

4.Turn off the power supply and the equipment to be powered during hook-up.

5.Connect the positive polarity input of the circuit to be powered to the positive (red) terminal of the “A” supply and connect the negative polarity of the circuit to the negative terminal of the “B” supply. Connect the circuit ground to the ground terminal of the “A” supply, the positive terminal of the “B” supply, or the GND (green) terminal.

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Fig. 15. Typical Hook-Up Using Identical Positive and Negative Voltages with a Separate Common.