Service manual

Figure 3.1 Run mode commands

Pressing the start switch places the power supply in a power state. The starting sequence

consists of energizing the step start and main contactors followed by enabling of the power

processing stages. Once enabled, output voltage and current increase to the set points

established by the rotary, external analog control, RS232, optional IEEE-488, or optional

Ethernet communications.

Pressing the stop switch places the power supply in a standby state. The power processing

stages are disabled and the step start and main contactors are denergized.

The V/I dis key displays the voltage and current set points on the voltage and current display,

respectfully. The display reverts to displaying the actual output voltage and output current when

the V/I dis key is released. If the power supply is operating in voltage mode, then the actual

output voltage will be close to the voltage set point and the actual output current will be less than

the current set point. If the power supply is operating in current mode, then the actual output

current will be close to the current set point and the actual output voltage will be less than the

voltage set point.

The trip dis key displays over voltage trip and over current trip on the voltage and current

display, respectfully. The display reverts to displaying the actual output voltage and output

current when the V/I dis key is released.

3.1.2 Set Point Commands

Figures 3.2 through 3.3 illustrate set point commands for over voltage trip set and over current

trip set, respectively. These commands can be made when the power supply is in either the

standby, alarm, or power mode states.

START

STOP

V/I SET

CLEAR

STANDBY LEDOFF

POWER LEDON

OUTPUT POWERENABLED

OUTPUTPOWER DISABLED

POWER LEDOFF

STANDBY LED ON

CLEARS ALL ALARMS LEDS EXCEPT FOR EXTTRIP

POWER LEDOFF

STANDBY LED ON

RETURNS TO NORMAL WHENRELEASED

DISPLAYS VOLT SET ON VOLTDISPLAY

DISPLAYS CUR SET ONCUR DISPLAY

DISPLAYS OCT SET ON CUR DISPLAY

DISPLAYS OVTSET ONVOLT DISPLAY

RETURNS TO NORMAL WHENRELEASED

TRIP SET