GW Instek GPS-x303 Series - Manual (Page 11)

MULTI-OUTPUT POWER SUPPLY
USER MANUAL
16
adjust the maximum current value. Because current through the two supplies
must be equal when they are being used in series, the lowest CURRENT
control setting will set the maximum output current.
C. Adjust the output voltage to the desired level by using the CH1
VOLTAGE controls.
D. Turn off the power supply and the equipment to be powered during
hook-up.
E. If “single supply” operation is desired, this allows the power supply to be
used as twice the voltage and rating current simply by using the negative
(black) terminal of the CH2 supply and the positive (red) terminal of the
CH1 supply, the configuration as shown in Fig. 5-3.
Power
Supply
Fig. 5-3 Single Supply
F. If the chassis or common of the equipment being powered is separated
from both the positive and negative polarity power inputs, the output of
the CH2 (negative) supply tracking the output of the CH1 (positive)
supply, the configuration as shown in Fig. 5-4.
Power
Supply
Fig. 5-4 Positive and Negative Supply
MULTI-OUTPUT POWER SUPPLY
USER MANUAL
17
(3) Parallel Tracking Operation
In the parallel tracking mode of operation, both supplies are strapped
together (in parallel). This allows for a rating voltage supply with a double
rating current capability. Only the CH1 output terminals are used for parallel
tracking operation. In the parallel tracking mode, the CH2 supply output
voltage and current track the CH1 supply output voltage and current.
A. Set the power supplies to the Tracking Parallel mode by engaging both
Tracking switches.
B. Output voltage will now be read from the CH1 VOLTAGE display.
Output current is exactly double the value read from the CH1 CURRENT
display (because each supply is providing the same amount of current).
C.Because both voltage and current of the CH2 supply track the CH1 supply,
the maximum current and voltage are set by using the CH1 controls. Using
the CH1 supply output jacks, follow the instructions for “Setting Current
Limit” (5-2 Section). Remember that the actual current output at the CH1
supply output jack is double the reading on the CH2 indicator meter.
D.Adjust the output voltage to the desired level by using the CH1
VOLTAGE controls.
E. Turn off the power supply and the equipment to be powered during
hook-up.
F. Connect the positive polarity of the device being powered to the red (+)
terminal of the CH1 power supply.
G. Connect the negative polarity of the device being powered to the black (-)
terminal of the CH1 power supply. The configuration is shown as Fig. 5-5:
Power
Supply
Fig. 5-5 Parallel Tracking Operation