Rev A Nov 2017
Page 22
Chapter 4
Standalone Operation
4.3.5 Adjusting the Temperature Control Loop
By setting the control loop parameters of the PID control loop the
temperature controller TTC001 can be adapted to most different
thermal loads.
Press the Mode button to enter the Setup Menu.
Scroll using the OUTPUT Knob to select the GAInS menu item.
Press the ENTER button to enter the Gain menu.
Use the OUTPUT Knob to move throu gh the menu items and
select the desired parameter.
The Proportional gain (PGAIn) adjusts how rapidly the TTC001
responds to differences in the set te mperature and the actua l
temperature. Increasing this value will speed up the heating or
cooling of the TTC001 and decrease the time for the actual
temperature to reach the set temperature. However, increasing
this value also in creases the ampl itude and number of
overshoots and could make the system unstable if adjusted too
high.
The Integral offset control (IGAIn) minimizes any offset from the
set temperature caused by thermal loads. Increasing this value
will reduce the offset, but like the PGAin, will also increase the
amplitude and number of overshoots.
The Derivative gain control (DGain), decreases the amplitude
and number of overshoots but also slows down the rate that the
actual temperature approaches the set temperature.
The control loop parameters can be set automatically by
selecting the menu item ‘Auto’. This procedure takes about 10
minutes to complete. While it is running the display shows the
progress by displaying the current step number that is running in
the procedure, from step 1 ("S1") through step 4 ("S4"). Once the
three control parameters have been automatically set, they can
be manually adjusted slightly to further improve the performance
of the system.
