Tidal Engineering Synergy Series Technical Manual page 217

16.2.2.2 Select Cascade PIDs
16.2.2.3 Select Air Temperature Limits
Warning!
The ranges set for Cascade High Limit and Cascade Low Limit must be within the range of the
sensor used, which is described in the Select Cascade Sensor section. RTDs have a greater
temperature range than the Synergy Controller's UUT thermocouple sensor. The UUT module Type
T thermocouple range is as follows: Low Value = -100 deg. C and High Value = +400 deg. C.
Synergy Controller Technical Manual, Revision H
Cascade Setup Folder
♦
PID Folder: Cascade PID loop settings.
(Sect. 3.2)
♦
Settings Folder: High and Low Air
Temperature Limits and the Sensor
Selection.
♦
Enabled Folder: Enable and disable the
cascade feature.
Open the PIDs folder in the screen above to view
the screen shown on the left. Use this screen to
view and change the Proportional Band and
Reset settings.
Note: Rate and Rate Band settings aren't used.
Select the Settings Folder from the Setup\PID
Settings\Cascade screen. In the Settings screen
shown, 'Cascade Low Limit' and 'Cascade High
Limit' are the minimum and maximum air
temperatures that the controller will use to
achieve the desired product temperature. These
parameters default to -100 C and +200 C,
respectively but should be changed to values
dictated by the chamber and product under test.
The chart below shows a graph of air
temperature setpoint versus PID output for the
default values.
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