© 2015 Thorlabs
3 Operating Instruction
15
3.2 Operation
·
Connect the jack "TE OUTPUT" (R5) at the rear panel of the TED200C to the input "TEC
DRIVER" of the Thorlabs Laser Diode Mount using the supplied cable CAB420-15. If a
different laser diode fixtures is used, the output jack “TE OUTPUT” (R5) must be connected
according to the
"Connecting a temperature sensor”
.
·
Switch on the Temperature Controller TED200C.
·
Select a suitable
for the TEC element
·
Select the used temperature sensor with key (F25).
Note
The TEC output can be switched on only if a temperature sensor is connected "TE
OUTPUT" (R5) and the sensor type is selected correctly. If the connected temperature sensor
does not correspond to the selected sensor type, the LED "OPEN" (F6) lights up. In this case
check the connection and the type of the temperature sensor.
·
Select "TSET" to display the set temperature (keys F17 or F18)
·
Set the desired temperature "TSET" using the tuning knob (F10).
·
If a thermistor is used, the instead of temperature (°C) the resistance is set (kW). If an
AD590/AD592 or LM135/LM335 is used as temperature sensor, the set temperature is
entered in °C.
·
Switch on the TEC current output by pressing key "ON" (F9). The LED "ON" (F8) lights up.
Note
The TEC output cannot be switched on as long as the LED "OPEN" (F6) lights up. In such case
check the connection of the temperature sensor and the selected sensor type.
During operation between the displayed values for "T
SET
", "T
ACT
", "I
LIM
"
or "I
TEC
" can be
switched at any time by pressing (F17) or (F18).
3.2.1 Setting the TEC current limit
The Temperature Controller TED200C delivers a maximum TEC current of 2 A. Prior to switch
on the TEC output, an appropriate TEC current limit "ILIM" should be set using the
potentiometer "LIM I" in order to avoid damage of the TEC element.
A limitation of the maximum TEC current can be helpful to optimize the settling time in case of
a low thermal load (laser with low output power, set temperature close to environmental
temperature etc.)
Select the display parameter "I
LIM
" with the key (F17) or (F18).
Use a screwdriver to set the desired TEC current limit "I
LIM
" with the 12-turn potentiometer "LIM
I" (F12).
Note
The current limit can be displayed at any time by selecting the parameter "I
LIM
".
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