1.8 Pre-settings
ITC500 / page 16
1.8 Pre-settings
To protect the laser diode the maximum possible current at the output of the ITC5xx
can be limited.
To protect the TEC element and the other components of the setup the maximum
allowed TEC current, the maximum temperature as well as an operating temperature
window may be selected.
1.8.1 Setting the limit of the laser current I
LD LIM
This hardware limit is set via the 25-turn potentiometer marked ADJ that is located
next to the LED I
LD LIM
at the front of the ITC5xx. The hardware limit is displayed
continuously on the display if the display I
LD LIM
is selected.
1.8.2 Setting the limit value of the TEC current
•
Check the maximum allowed TEC current in the datasheet of your TEC element.
•
Select the display I
TEC LIM
.
•
Change the limit value of the TEC current to the desired value with the
screwdriver-potentiometer besides the LED I
TEC LIM
.
1.8.3 Setting the temperature window
•
Check the type of temperature sensor in your setup.
•
Select this sensor in the field marked “SENSOR“.
•
Decide upon the range of the temperature window (or equivalent resistance
window of your thermistor).
•
Select the display T
WIN
.
•
Change the size of the window to the desired value with the screwdriver-
potentiometer next to the LED T
WIN
. The display shows a “plus-minus“ – value, so
if you select i.e. 5.000°, the window will reach from 5° below the set value to 5°
above the set value.
•
Activate this function with DIP switch 5
(Refer to chapter 1.8.4, “DIP switch for “wake up“ preset“ starting on page 17)
Summary of Contents for ITC502
Page 2: ...Version 2 16 Date 25 07 2006 Copyright 2006 Thorlabs ...
Page 8: ......
