Polarity Check Of The Tec - THORLABS ITC1 Series Operation Manual

ITC1xx

4.5 Polarity Check of the TEC

Preconditions
·
Connect TEC element and temperature sensor (see section
sensor must have good thermal contact to the active surface of the TEC element.
·
Switch on the ITC1xx.
·
Select the correct type of sensor
·
Set the appropriate value
ST1).
Polarity check of the TEC element
·
Adjust the temperature set point T
C11 of ST1) a few degrees away from the actual room temperature.
·
Observe T or R
ACT
·
If T or R
ACT ACT
polarity and repeat the procedure.
·
If T or R
ACT ACT
but the P-, I- and D share
·
If T or R
ACT ACT
correctly, however the values for the P-, I- and D share of the control loop might still need
to be adjusted (Refer to section
1
) The total combined current for the ITC133 is limited by the total thermal dissipation loss.
When the standard heat sink is used, the total output current should be limited to 3 A (I
£
3 A). Optimized cooling by fan or bigger heat sink allows 3 A LD and 3 A TEC at the same
time under the condition that the power supply provides 6.1 A.
20
(switch
1
) for I
TEC,LIM
SET
(ST1 pin C10) and switch on the module.
ACT
runs away from the set point, the TEC element is reverse poled. Change
is oscillating around the set point, the TEC element is connected correctly,
values of the control loop need to be adjusted.
is settling properly to the set point, the TEC element has been connected
PID
S3).
, using the potentiometer
or R using the potentiometer
SET
Adjustment).
Temperature Controller). The
P3 (measured at
P4 (measured at
© 2018 Thorlabs GmbH
pin A9 of
pin
+ I
LD TEC