PPC2 AF OPERATION AND MAINTENANCE MANUAL
© 1998 DH Instruments, Inc. Page 20
During static pressure control, the hold limit is active. If the pressure goes
outside of the hold limit, a "not ready" condition will occur (see Section 3.1.2.4)
and pressure will be readjusted to the target value (see Section 3.2.3 for default hold
and stability limit values and Section 3.2.6 for setting the hold and stability limits).
Static Pressure Control Operation
3.1.2.3.2 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" condition will occur (see Section 3.1.3.4; see
Section 3.2.3 for default hold limit values and Section 3.2.6 for setting the hold limit).
Dynamic Pressure Control Operation
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