Alpes Lasers . TC-3 Manual de usuario descargar pdf (Pagina 32)

Page 32 · TC-3 Temperature Controller User’s Manual

of resolution is displayed, but additional resolution is available by

viewing the PID parameters in the menu. The Gain setting will be

changed to PID.

If the AutoTune process fails, the instrument will display an E-436

AutoTune Failed error message and turn the output off. Any of the

following can cause the AutoTune to fail:

• Noisy temperature measurements, which make it difficult to

accurately measure oscillations

• Any condition that causes the output to turn off (temperature

limits, sensor limits, etc.)

• Systems with very low P or I terms

In the Auto-Tune fails due to thermal system limitations, you will need

to manually modify the PID parameters as described in the section

above or select factory gain setting.

You can turn the output off at any time to cancel the AutoTune

process, and the PID parameters will remain unchanged (an E-436 will

also be displayed).

Using the AutoTune Function Remotely

The AutoTune function can be done remotely, and works essentially

the same as local operation. The TEC:AUTOTUNE command starts the

process, and requires one parameter, which is the AutoTune

temperature test point.

The command will immediately put the instrument into AutoTune

mode, and the display will indicate progress in the same way as local

operation. The TEC:AUTOTUNE? query can be used to monitor the

process of AutoTune. A response of 1 indicates AutoTune is in

progress. Once complete, the instrument will respond with a 2 if

AutoTune failed or a 3 if AutoTune succeeded. A response of 0 is

returned if the instrument has never started an AutoTune process.

Turning the output off remotely will cancel the AutoTune process and

generate an E-436 error.

More details on the use of the command can be found in the Computer

Interfacing Manual.

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Alpes Lasers . TC-3 Manual de usuario Pagina 32