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3 Operating the ITC4000 Series
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3.9 TEC Source Setup
Setting the operating mode:
In the TEC Source Setup menu, the temperature controller operating mode of your ITC4000
can be changed. It can be shifted between Current Source mode and Constant Temperature
mode. In Current Source mode, an internal constant current loop is closed, and the TEC output
current can be set in Ampere. In Constant Temperature mode a temperature control loop will
be closed via an external feedback source (current, voltage or resistance temperature sensor).
A TEC current depending on the feedback value will be driven. If the Exponential or Steinhart-
Hart parameters of the connected thermistor sensor are known and entered, the ITC4000 of-
fers a temperature control in Celsius, Fahrenheit or Kelvin.
Setting the TEC current limits:
In the TEC Source Setup menu, the TEC current limit for the constant current and the constant
temperature mode can be set. This feature protects the TEC element against excessive TEC
current.
Setting the temperature set point limits:
In the TEC Source Setup menu, the temperature set point limits for the constant temperature
mode can be set. This feature protects the TEC setup against accidental excessive temperat-
ures. The limit values can be set from -150°C to +150°C.
Setting the temperature set point:
Enables the temperature setting in constant temperature mode. Entries will be ignored in con-
stant current mode.
Setting the constant current mode set point:
Offers a current setting in constant current mode. Entries will be ignored in constant tempera-
ture mode.
