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3 Operating the ITC4000 Series
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3.14 Temperature Protection
The temperature controller of the ITC4000 provides an adjustable
Temperature Window
to
monitor the correct function of the temperature control. The display shows a “plus / minus“
value, so if you select i.e. 5 °C, the window will reach from 5 °C below the temperature set point
to 5 °C above the temperature set point.
If the actual temperature moves out of the preset window, the green LED in the TEC ON key
(F6, see section
Operating elements at the front panel
) is flashing and the temperature pro-
tection indicator flashes up. The behavior of the laser output is depending on the selected in-
hibit mode in the Laser output settings.
To avoid multiple sets and resets of the window protection error in transient oscillation or during
tuning steps, you can adjust an appropriate
Protection Reset Delay
. A value between 50%
and 100% of the oscillation period is recommended. With this setting, the window protection will
reset only if the actual temperature remains inside the window for a sufficient time, indicating a
stable settling to the temperature set point.
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