Vanguard RFD-200 S3 - Manual (Page 12)

RFD-200 S3 USER’S MANUAL REV 1
9
2.4 Timer Start and Timer Stop Inputs
The RFD-200 S3’s built-in timer displays the test results in
both milliseconds and cycles.
There are three selections for the [TIMER START]
input:
• INTERNAL
Timer starts when voltage/current sources are
turned on or off (user selects Start-On mode or
Start-Off mode).
• DRY
A change in state of a dry contact input after the
user has selected the Start-On mode or Start-Off
mode will start the timer.
• WET
A change in state of a voltage input (voltage/no voltage) after the user has selected the
Start-On mode or Start-Off mode will start the timer.
There are three selections for the
[TIMER STOP]
input:
• INTERNAL
Timer stops when the user selects OFF mode.
• DRY
A change in state of a dry contact input after the timer has started will stop the timer.
• WET
A change in state of a wet contact input after the timer has started will stop the timer.
NOTES
1. For the WET input, A voltage level from 20 to 255 Vac/dc is considered as “ON”.
Voltage less than 10 Vac/dc is considered as “OFF”. The input is not polarity
sensitive.
2. The dry contact input detects contact closed (shorted) or contact opened.
3. Applying a voltage to the timer “Dry” contact input may damage the RFD-200 S3
2.5 RFD-200 S3 Power Resistors
Five power resistor connections are available on the RFD-200
S3. A finer control of the current output can be achieved by
connecting one or more resistors in series with the current
source.