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Metaphase
Technologies
ULC-2
User-interface Menus
A. Setup Menus
The setup menus below appear only when the ULC-2 is powered on. Each menu described below ap-
plies to two channels independently. The menus include:
Trigger Source (Internal or External)
This menu allows the setting of the source of trigger when in Strobe mode. In normal operation, Exter-
nal trigger is selected, but for setup and testing purposes, users may elect to use internal trigger in an
effort to verify wiring connections and operation.
When set to External trigger, the ULC-2 will ignore external trigger input events received faster than
what is set by Strobe Minimum Period.
For Internal trigger, the frequency of the strobing output is set by Strobe Minimum Period. For both
types of trigger, the output Strobe Pulsewidth is determined by the Strobe Pulsewidth parameter.
Continuous (DC) Current Limit
This “Limit” menu provides the user a way to set the upper bound of the LED output DC Current up to
4 A current found in the “Run time” menus. For example, if the DC Current Limit is set to 1.6 Amps, the
DC current can be adjusted from 20mA to 1.6 Amps. Such a limit assures adjustments never exceed the
limits of the LED load. This limit applies only to DC Current Mode of operation. In DC Voltage Mode, the
ouput current may exceed 4A depending upon the load.
Voltage (DC) Limit
This “Limit” menu provides the user a way to set the upper bound of the LED output DC Voltage (found
in the Runtime menu) between 3 and 50 volts. For example, if the DC Voltage Limit is set to 24 volts,
the DC Voltage can be adjusted from 3 volts 24 volts. Such a limit assures adjustments never exceed the
limits of the LED load. This limit applies only to DC Voltage Mode of operation. In DC Current Mode, the
output voltage may exceed 60V depending upon the load.
Strobe (Pulse) Current Limit
This “Limit” menu provides the user a way to set the upper bound of the LED output Strobe current up
to 40 amps found in the “Run time” menus. For example, if the Strobe Current Limit is set to 9 Amps,
the Strobe current can be adjusted from 100mA to 9 Amps. Such a limit assures adjustments never ex-
ceed the limits of the LED load.
Strobe Pulsewidth Limit
This “Limit” menu provides the user a way to set the maximum LED output Strobe Pulsewidth found
in the “Run time” menus. For example, if the Strobe Pulsewidth Limit is set to 100 microseconds, the
Strobe Pulsewidth can be adjusted from 2 to 100 microseconds. Such a limit assures adjustments never
exceed the limit of the LED load.
