B&K Precision 1651A - Manual - Manual (Page 35)

31
_______________________________________________________________________________________APPLICATIONS
Two Identical Positive Voltages With a Common
Negative (Refer To Fig. 11)
Some electronic equipment requires two identical positive
voltages with a common negative. A good example of this
would be a digital car clock where there are two +12 volt
inputs and a common negative. Using both supplies in the
parallel tracking mode would provide the simplest hook-up
and operation. This type of “split supply” operation is
obtained as follows:
1. Select the TRACKING PARALLEL operating mode and
set the A/B Metering to monitor the “A” supply.
2. Set the desired voltage and maximum current using the
“A” VOLTAGE and CURRENT controls.
3. Connect a ground wire between the “A” supply’s
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 inputs of the circuit to be
powered to the positive (red) terminals of the supplies
and connect the common negative input of the circuit to
be powered to the “A” supply’s negative (black) or GND
(green) terminal.
Fig. 11. Typical Hook-Up Using Two Identical
Positive Voltages and a Common Negative.