CSZ EZT-570S, Руководство пользователя

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EZT-570S User Manual
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5.12 Tuning
The Tuning screen allows for both manual and automatic tuning of the EZT-570S control loops. All
CSZ chambers are factory tuned; however, the chambers are typically empty and under no load.
Unless specific performance tests were performed at the factory for your particular needs, the base-
line performance may not be accurate once your product is placed inside the chamber.
Tuning parameters should only be adjusted by skilled users familiar with proportional control.
Improper settings can result in control loop instability and equipment damage. All of the EZT-570S
control loops feature an automatic tune function which is the recommended method of loop tuning. If
the control response achieved after performing an auto tune does not provide the desired control
response, then minor adjustment of the tuning parameters may be done to obtain the desired
response.
Figure 5-17 Tuning
The tune screen also provides a live real time chart for monitoring the control response of the control
loop while adjusting tuning parameters. The chart is fixed at a 10 minute time period and updates
once per second.
The
left and right arrow buttons at the top right corner of the screen will cycle through each loop
available. By pressing either button, the previous or next loop will appear in sequential order. When
the first or last loop is reached, the EZT-570S will automatically wrap around to the beginning or end
of the list to show the next loop. If the system has only one loop, the arrow buttons will not be shown.
The
Set button allows the user to adjust the loop set point without having to leave the tuning screen in
order to observe the control response.
The
AT button is provided to activate the automatic tune function of the control loop. During the auto
tune procedure, the button indicator will be on to show the tune is in progress. When the tune is
complete, the button’s indicator will automatically turn off to indicate the tune is complete. If at any
time during the tune process, you want to cancel the auto tune, press the button to cancel the tune.
It is recommended that only one loop be tuned at a time. Temperature for example, affects humidity.
If the EZT-570S is currently tuning temperature and auto tune were activated on the humidity loop as
well, any fluctuation in air temperature during its tuning process can affect the tuning process of the
humidity loop. By tuning chamber temperature first and allowing it to stabilize prior to activating the
humidity loop tune, it will insure that the humidity control loop gets an accurate base-line performance
reading on the chamber.