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16005-D03
T-Cube TEC Controller
The actual control range depends on the sensor ratings and the individual thermal
setup.
3.3.3 Connecting a Thermistor
The thermistor must be conn ected between pin 3 and pin 4 of the TEC OUTPUT
connector as detailed in Appendix A.1 The polarity is unimportant if the thermistor
is floating. If one pin of the thermistor is grounded (for example in a laser module), this
pin has to be connected to pin 3.
If the Temperature Controller TTC001 is operated with a the rmistor as the
temperature sensor, the set temperature and the actual temperature are displayed
in k
Ω
. From the "SEenSr" menu in the Setup Menu, select either ‘th20’ or ‘th200’ (see
Section 4.3.3.). This selects the resistance range of the thermistor between a
maximum thermistor resistance of 20 k
Ω
(measurement current is 100 µA) and a
maximum thermistor resistance of 200 k
Ω
(measurement current is 10 µA).
In most cases a 10k thermistor will be used. In this case, the 20K range may be
selected but this will limit the actual temperature range to approximately 15 °C (see
thermistor operating curve for actual values). Usually this is sufficient but if
temperatures lower than 15 °C are required, the 200k range should be used. This will
lower the overall set point resolution but increase the operating range.
3.3.4 Connecting a Temperature Sensor AD590/AD592
If the temperature/current transducer AD590 (or AD592) is used as the temperature
sensor, it is connected between pin 10 (-) and pin 11 (+) of the TEC OUTPUT
connector as detailed in Appendix A.1 From the "SEnSr" menu in the Setup Menu,
select ‘Ad590’ (see Section 4.3.3.).
The accuracy of the displayed temperature
depends on the tolerance of the transducer used.
Caution
A reverse poled TEC element may lead to thermal runaway and destruction of
the connected components. If there is any doubt concerning the TEC element
polarity, perform a polarity check as detailed in Section 3.3.5.
