EZT-550 Controller Manual
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4.2 Guaranteed Soak Limits
To access the guaranteed soak limits, select Guaranteed Soak from the profile Views menu. The soak limits
screen allows you to set the control tolerance for soak steps when in profile operation. When the process
variables differ from the setpoints by more than the soak limits, the profile will go into hold and the timer will stop
until the process variables re-enter the soak bands. These limits apply to each step in the profile and only need
to be set once.
To change the limits, touch the limit entry field. Enter the new soak band via the keypad. Note that setting a
band limit too tight, could prevent the profile from operating correctly because the chamber may not be able to
control to such a tight band setting. A typical band setting would be 1°C (1.8°F) for temperature and 4% for
humidity.
The soak limits are saved with the current profile. When changing the soak band settings, be sure to save the
profile in order to update the profile with the new settings. This insures that each time the profile is loaded and
run, it will control to the proper band settings.
Using Guaranteed Soak
To enable the guaranteed soak function, the event must be set for each step that it is operate. The soak can be
enabled on temperature, humidity or both for each step. This is done by checking the appropriate box in the
Step Events window when creating/editing a profile under the Profile Entry screen.
