Alpes Lasers . TC-3 Datasheet download pdf (Page 71)

5.1 Temperature Controller TC-3

Once you have made all your adjustments, press the MENU button to exit the menu

(in the future, if you are only changing one value, you do not need to press the knob

— pressing the MENU button while changing a value will save the value and exit).

Next, connect the cable between your housing and the Output connector of the TC-

3. We recommend using our cables as they have been designed to work well with the

TC-3. If using your own cables, ensure they have been properly wired according to

the pin-out of the TECSource and your ﬁxture.

Set the set point to a temperature close to room temperature (typically +15

◦

C) and

press the Output button. The output will turn on and you will see the voltage and

current begin driving the ﬁxture to the set point you have chosen. Depending on the

thermal size of your ﬁxture, it may take seconds or several minutes to reach the set

point.

If you notice the temperature is oscillating around the set point and not stabilizing,

you may need to adjust the Gain setting in the menu. If the temperature is quickly

jumping up and down, the Gain will typically need to be reduced. If the temperature

is slowly moving up and down, try a higher Gain. You may need to experiment with

several gain settings to ﬁnd the ideal value, and for even ﬁner control, you can set the

Gain to PID and directly set the PID control values.

Finally, adjust the set point downwards or upwards to the desired set point. It is

good practice to adjust the set point in steps of 5

◦

C and wait for the actual tempera-

ture to stabilize before changing the set point again, as the HHL and TO3 housing age

prematurely with large temperature swings. The LLH is less sensitive and can with-

stand large temperature swings. The recommended temperature change rates are

given in table 5.3. Using the settings of table 5.2 ensures these rates are respected.

CAUTION:

The TC-3 contains a feature known as AutoTune. Usage of this feature

is NOT RECOMMENDED with the housings of Alpes Lasers. Using

AutoTune risks damaging or reducing the lifetime of the Peltier

elements.

Housing I

lim

HHL (single stage) 3.0 A

HHL (double stage) 2.5 A

LLH 5.0 A

Table 5.1.: Current limits settings

2014 SA 61

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 125 126

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Alpes Lasers . TC-3 Datasheet Page 71