16
Pulsed output
Simple Set Up cannot be used to set up:
Continuous output in steps of 0.25mA
Continuous output, selected by digital input
Setting current protection
Extended Set Up can be used to set all features but is slightly more difficult to
use.
9.3.4
Current Protection
Current protection can be used to provide the LED loads protection from being
overdriven. This is not absolute protection but does provide some safety when
setting up the PP600.
Use Extended Set Up to set the maximum current rating for each output
channel. The PP600 will then ensure that the current, averaged over
approximately 200ms, to the LEDs does not exceed the rating.
If the rating is exceeded, the output is turned off and the display shows “EC 1”
or “EC 2” to show which channel has exceeded its rating. If one of these
messages is displayed press the SELECT button to clear it.
Note that after a cold boot (and the factory default) the maximum rating is set
to 4A.
9.3.5
Setting Numeric Values
When the PP600 displays numeric values for the user to change, the right hand
digit will be flashing to indicate that the Up and Down buttons change the
lowest digit. Pressing the Range button selects another digit to flash, which will
then be change when Up or Down are pressed.
