PPC2+™ Operation and Maintenance Manual
Page 21
©2001 DH Instruments, Inc.
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Figure 5. Static Pressure Control Operation
Dynamic Control
Dynamic control mode is designed to set the pressure to the target value and control
continuously to keep pressure within the hold limit and as close to the target value
as possible. The advantage of this control mode is that the final pressure achieved
will be the same as the target value. However, unlike static control, in dynamic control
a control error will be included in the pressure achieved. The maximum value of the
control error is equal to the hold limit. The average value of the control error is
generally well inside the hold limit.
During dynamic pressure control, the hold limit is active. If the pressure goes outside
of the hold limit, a Not Ready (<
↑
> or <
↓
>) condition will occur. See Sections 3.1.2.4
and 3.2.3 for default hold limit values. See Section 3.2.6 for setting the hold limit.
Summary of Contents for PPC2+
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