Laser Diode Driver LD8000
13
Ver. 1.0
Temperature card
Figure 10. Temperature card
This card is devided into three equal parts, one for each of the built-in temperature controllers.
You can activate or deactivate the controller with the
ON/OFF
button.
Max. Peltier Voltage
is to limit the controller output, not to damage the connected TEC module
(Thermo Electric Cooler, Peltier Element). Please refer to the datasheet of the present TEC
module for this value.
The
Target
temperature is set on the right side of the thermometer symbol. On the left side you
have to specify the
Upper and Lower Limits
. Within this window the laser operation is
ensured. When the temperature exceeds this limits, the laser and the corresponding temperature
controller are turned off automatically. Please normalize the temperature or readjust the limiting
values before turning the laser and the temperature controller on again.
PID Controllers Card
Figure 11. PID Controllers card
For fine-tuning of the temperature controller settling speed, the PID parameters can be adjusted.
The parameters are labeled as Factors, this means that they do not have units. The values of the
factors range from 0 to 255. There is no equation to find optimal values, they depend on much
physical parameters and should be found intuitively.
