GW Instek GPS-x303 Series User Manual

Page 10

MULTI-OUTPUT POWER SUPPLY

USER MANUAL

5-4. Operation Mode

(1) Independent Operation

The “CH1” and “CH2” supplies each provide a 0 to rating volts output at up

to rating amps. This procedure covers the use of the CH1 and CH2 supplies

only when they are used independently from each other. When used in the

independent operating mode, the operation controls of the two power supplies

are completely independent and either supply can be used individually or

both can be used simultaneously.

A. Disengage both Tracking mode switches (both switches out) so that the

power supply is in the independent operating mode.

B. Adjust “Voltage” control and “Current” control to the desired output

voltage and current.

C. Turn off the power supply and the equipment to be powered during

hook-up.

D. Connect the positive polarity of the device being powered to the red (+)

terminal of the power supply.

E. Connect the negative polarity of the device being powered to the black (-)

terminal of the power supply.

F. Fig.5-2 illustrates the connection procedure.

Power

Supply

Fig. 5-2 Independent Operation

MULTI-OUTPUT POWER SUPPLY

USER MANUAL

(2) Series Tracking Operation

When the series tracking mode of operation is selected, the position (Red)

terminal of the CH2 supply output is internally connected to the negative

(black) terminal of the CH1 supply.

In the series tracking mode, the maximum output voltage of both CH1 and

CH2 supplies can be simultaneously varied with one control. The maximum

CH2 supply voltage is automatically set to the same as the CH1 supply by

using the CH1 VOLTAGE controls.

A. Set the power supplies to the Tracking series mode by engaging the left

Tracking switch and release the right Tracking switch.

WARNING. Voltage more than 60V DC has a lethal shock hazard

to the user. Be careful when connecting power supplies in series to

achieve voltages higher than 60V DC total or 60V DC between any

connection and earth ground.

Note

Simultaneously metering of both current and voltage can be obtained in the

mode of operation setting one of the displays for current metering and one

for voltage metering. In this case, the output voltage (across the two supplies)

is actually double the displayed value. For example, if the CH1 display is set

for voltage metering and the CH2 display for current metering, the output

voltage across the CH1 positive (red) terminal and the CH2 negative (black)

terminal would be double the reading on the CH1 LED Display (since both

supplies are putting out the same voltage). The actual output current would

be the value read from the CH2 LED Display (since the two supplies are

wired in series, current flowing through each supply must be equal).

Set the CH2 CURRENT control to the full clockwise position. The

maximum current is set by using the CH1 CURREN control. Follow the

instructions for “Setting current Limit” (select “CH1” or “CH2” supply

independently by using the CH1 CURRENT control).

Note:
Because the supplies are being used in series, either CURRENT control can

be used to set maximum current. If desired, the CH1 CURRENT control can

be rotated fully clockwise and the CH2 CURRENT control can be used to