Vanguard RFD-200 S3 User Manual

Page 11

REV 1 RFD-200 S3 USER’S MANUAL

2.3 Control

Switches

2.3.1. Voltage and Current Source Output Controls

The RFD-200 S3’s voltage and current source outputs are controlled by the

[UP ARROW]

and

[DOWN ARROW]

buttons. There are four control settings for the voltage/current sources:

• START-ON

When this mode is selected, the RFD-200 S3 turns on the voltage/current sources and
starts the timer.

• OFF

When this mode is selected, the voltage/current sources are turned off and the timer is
stopped.

• ON

In this mode, both the voltage and current sources are simply turned on and remain on
until turned off by the user. The timer is not used in this mode. This mode is used to set
the voltage or current before performing a test.

• START-OFF

In this mode, the RFD-200 S3 turns off the voltage/current sources and starts the timer.

The selected mode is indicated by an illuminated LED next to the label.

The voltage and current source settings are controlled by the

[OUTPUT CONTROL]

knob.

2.3.2. LCD Contrast Control

To change the LCD screen’s contrast, press and hold the

[CONTRAST]

button. The screen

contrast will increase until it reaches the darkest setting. Then it will return to the lightest
setting and begin increasing the contrast again. Release the

[CONTRAST]

button when the

desired contrast level has been reached. The contrast setting will be stored in the RFD 200 S3’s
memory.