ILX Lightwave LDC-3700C Series, Руководство пользователя, Страница: 38 / 176

O P E R A T I O N S
Operating from the Front Panel
22
LDC-3700C Series
C H A P T E R
2

DISPLAY section will also change the controller to set point mode. Make sure that
the mA enunciator next to the display is illuminated before adjusting the set point.
After an adjustment has been made, and the ( LASER DISPLAY ) SET switch and
ADJUST knob are released, the SET mode will time out in three seconds. The
new set point will be stored in non-volatile memory. If the original display mode
differed from the newly adjusted set point, the
LASER display will revert to the
original display mode ( I , I
PD
, or P
PD
).
Note: When adjusting any LASER parameter, display mode or operating mode, the LAS
indicator in the ADJUST section must be lit.
We are not quite ready to turn on the laser. One of the laser protection features
our controllers offer is a fully independent hardware current limit. The current limit
protects your laser by never allowing the laser drive current to exceed the limit
independent of the set point and the controller mode (Constant Current or
Constant Power).
Set Current Source Limit
To set the current source limit, use the SELECT push button in the
PARAMETER / LASER section of the front panel to select LIM I . You will notice
there are two LIM I selections, one in blue text and the other in black text. The
blue text limit selection corresponds to the blue text current source range as
indicated in the
RANGE section. The LASER display will be indicating the limit set
point in mA indicated by the LIM I LED, for its corresponding range. Press and
hold the ( PARAMETER ) SET push button and rotate the adjust knob, clockwise to
increase the limit set point value, or counterclockwise to decrease the limit set
point value. Set the limit to 175 mA. Once the
SET push button is released, the
new parameter value is stored in non-volatile memory.
When the LASER current limit is reached, the CURRENT LIMIT error indicator
flashes. The current limit setting is independent of the voltage drop of the device
connected to the LASER output, and therefore, no dummy load is required for
precise adjustment of the current limit. Furthermore, since the current limit
TEC LAS
ADJUST