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TED4015
For use of other equipment, a shielded cable with two 17W2 mixed DSUB plugs, CAB4001,
(20A current rating) is also available.
When using a custom-made cable, we recommend to use a shielded cable for the sensor in-
puts with twisted pairs. Use a separate shielded cable for the TEC current and TEC voltage
measurement lines. The TEC current lines should be as short as and as close as possible to
minimize inductance.
3.1.2 Connecting a TEC Element
Attention
The TEC element output of the TED4015 is a ground-free output. Do not connect the TEC ele-
ment pins to any grounded pins (3, 5, 6, 12, 15) or to case ground, otherwise the electronic cir-
cuit will be damaged.
A TEC element connected with wrong polarity may lead to thermal runaway and damage of the
connected components.
Connect the thermoelectric cooler (TEC or Peltier element) to the high current contacts A1
(TEC+) and A2 (TEC-) of the 17W2 DSUB jack (R16, see section
).
When the Temperature controller is in cooling mode, current flows from TEC+ to TEC-. This is
defined as positive current, and with the TEC element connected correctly, its active surface
(which is in contact with the tempered object) gets colder.
Check the TEC polarity as follows:
·
Connect the TEC element and the temperature sensor to the 17W2 DSUB jack "TEC
OUTPUT" (R16) (Refer to section
and
). The sensor and the TEC element must be in good thermal contact to the
thermal load. The use of thermal conducting grease is recommended. Please refer to sec-
tion
Setup and function of a temperature controller
·
Turn on the TED4015.
·
Select the appropriate sensor type by pressing
Menu.
Scroll to Temperature Sensor
Setup by turning the adjustment knob. Switch into the the Temperature Settings by press-
ing the Enter button or the adjustment knob (F8) and select the appropriate sensor:
Menu
/ Temperature Sensor Setup / Temperature Sensor. Confirm by pressing
Done
or
the adjustment knob (F8) again.
·
Adjust a suitable current limit for the TEC element by selecting
Menu
/ Temperature
Source Setup / Current Limit. Confirm by pressing
Done
or the adjustment knob (F8).
(refer to section
Setting the TEC source parameters
).
·
Switch the display back to the measurement screen and set the desired temperature by
pressing and turning the adjustment knob (F8). Confirm the entered value by pressing the
adjustment knob.
·
Switch on the TED4015 TEC output current by pressing the key TEC ON (F6). The green
LED in TEC ON key (F6) lights up (see section
Operating elements at the front panel
). If
the green LED in TEC ON key is flashing, the current temperature is out of the tempera-
ture window.
If the TEC module is connected with correct polarity, the difference between the temperature
set point and the actual temperature will decrease. Provided that the control loop parameters
are set properly (refer to section
), the actual temperature should be in accor-
dance with the temperature set point rather quickly.
If the TEC module is connected with reversed polarity, the difference between the temperature
set point and the actual temperature will increase continuously. In this case, switch off the TEC
current by pressing key "TEC ON" (F6) and correct the TEC module wiring.
