45
XCell
TM
ATF System with C410:V3 Controller
User Guide
On User logoff, the controller continues to operate normally. A user must log back on to
make changes to setting.
6.2
Control Overview
To assure optimum results with the XCell
TM
ATF System, one should keep in mind the
following two general rules:
1.
The diaphragm motion must be a
continuous
one between the Pressure cycle
and the Exhaust cycle and vice versa (i.e. no dwell time).
2.
Ideally
,
the stroke travel of the diaphragm must be reversibly between fully
Pressurized and fully Exhausted extremes.
There should be no dwell time for the diaphragm at any point of the cycle.
The continuous movement of the diaphragm assures continuous tangential flow
through the filter. The maximum stroke of the diaphragm assures maximum mixing
and minimizing “dead space” retention within the system.
The C410:V3 controller control of the XCell
TM
ATF System is based on the above
two rules.
The XCell
TM
ATF System, having a constant pump volume, allows the controller to
calculate the Diaphragm Pump cycle time based on a user’s flow rate selection,
according to the following relationship:
𝑷𝑷𝑷𝑷𝑷𝑷𝑷𝑷
𝒅𝒅𝒅𝒅𝒅𝒅𝑷𝑷𝒅𝒅𝒅𝒅𝒅𝒅𝒅𝒅𝑷𝑷𝒅𝒅𝒅𝒅𝒅𝒅
𝒗𝒗𝒗𝒗𝒅𝒅𝑷𝑷𝑷𝑷𝒅𝒅
(
𝑳𝑳
) ÷ [
𝑪𝑪𝑪𝑪𝒅𝒅𝒅𝒅𝒅𝒅
𝒅𝒅𝒅𝒅𝑷𝑷𝒅𝒅
(
𝒅𝒅𝒅𝒅𝒅𝒅
)
𝟔𝟔𝟔𝟔
] =
𝑭𝑭𝒅𝒅𝒗𝒗𝑭𝑭
𝒓𝒓𝒅𝒅𝒅𝒅𝒅𝒅
(
𝑳𝑳𝑷𝑷𝑳𝑳
)
The pump displacement volumes, with no pressure difference across the diaphragm, are:
XCell
TM
ATF4 System
0.44L
XCell
TM
ATF6 System
1.2L
XCell
TM
ATF10 Lgcy System
5.1L
XCell
TM
ATF10 System
6.0-6.7L
See also Appendix 1. Cycle time vs. Flow rate
Therefore, selection of a
Flow Rate (L/min)
by a user, using an XCell™ ATF System with a
known
Pump Displacement Volume (L),
it is possible for the C410:V3 controller to
calculate the
Pump’s Cycle Time, Calculated CT.
At the end of each pump cycle, the Actual Cycle Time,
Actual CT,
is compared to the
Calculated CT.
The controller then uses the error between the two values to correct
Actual CT
to equal
Calculated CT.
Similarly, the C410:V3 controller also allows the user to enter XCell™ ATF System cycle
time (sec) directly to control flow rate; again, at the end of each pump cycle, the Actual
CT is compared to the Calculated CT. The C410:V3 controller is designed to maintain the
set flow rate automatically during the Pressure and Exhaust pump cycles. Based on an
entered set point in either Liters per minute, LPM, or Time, in seconds, the C410:V3
H.
LOGOFF.
