Arroyo Instruments TECSource 5400 Series, Руководство пользователя

Страница: 39 / 60

5400 Series TECSource User’s Manual · Page 39
To start the AutoTune function, select the AutoTune PID menu entry from the
main menu. Select the desired temperature setpoint. You will want to select
your typical operating point. If you will be operating at two or more set points,
you will usually want to select the set point furthest away from ambient. Once the
temperature test point is selected, press then
Enter . If you wish to perform
AutoTune remotely, see the following section for more information.
The instrument asks for a final confirmation to start the AutoTune process. Press
Enter to start, or Menu to exit.
A
Once the AutoTune process starts, the display will indicate the present
temperature, which step it is performing, and the word “AutoTune” will flash on
the display.
Once the AutoTune process is complete, the output will remain on and the
display will show “AutoTune Successful”. The three PID parameters will also be
displayed. Due to display limitations, only the first 2 places of resolution is
displayed, but additional resolution is available by viewing the PID parameters in
the menu. The
Gain setting will also 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
If 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).