DIGISPENSE 3020 CONTROLLER MODULE
Page 3-37
7 April, 2011
IVEK Corp.
P03L011B
If the dispense is stopped before the end of the chamber is reached, another metered dispense may be initiated, as
long as the volume dispensed is less than the Load Threshold.
3.3.1.5 Meter Multichamber
Meter Multichamber is the same as Meter without the volume being restricted to a single chamber. Once initiated, a
metered dispense will occur until the end of the chamber is reached; at which time a reload will automatically
occurred, followed by another dispense. This will continue until stopped.
Due to the multichamber capability of this mode, Drawback is not available. Since a Meter Multichamber operation
does not use a load threshold, LOAD MODE = EMPTY behaves like Manual in this mode.
3.3.1.6 Extra Production Mode Settings
Load Mode -
There are three Load Modes available: Manual, Empty, and Every. The configured Load Mode
determines when a Load is required, and whether a Load automatically occurs at the end of a Production Mode
operation.
NOTE
Load Mode does not affect the load portion of a multichamber operation.
Manual mode disables all automatic loading of the pump chamber. If there is not enough fluid in the pump chamber to
perform the next Production Mode operation, or the Load Threshold is met, a manual initiation of a Load will be
required before the next Production Mode operation may begin. This may be through the front panel, Logic I/O or
serial interfaces.
Empty mode causes an automatic loading of the pump chamber when there is not enough fluid in the pump chamber
to perform the next Production Mode operation or the Load Threshold is met. The loading will only automatically
initiate at the end of a Production Mode operation. If any other condition results in an insufficient pump chamber
volume (for example, Fluidic Setup Mode operation, or a changing of the Dispense Volume), a Load will be required
before the next Production Mode operation, but will not be automatically initiated. In this case, a manual initiation is
required.
Every mode causes an automatic loading of the pump chamber after every Production Mode operation. The loading
will only automatically initiate at the end of a Production Mode operation (i.e., it will not initiate at the end of a Fluidic
Setup Mode operation, or if a parameter changes). In Every mode, the pump must have a full chamber before a
Production Mode operation is allowed. If any other condition results in a non-full pump chamber volume (for example,
Fluidic Setup Mode operation, or a changing of the Dispense Volume), a Load will be required before the next
Production Mode operation, but will not be automatically initiated. In this case, a manual initiation is required.
Auto Retrigger -
Auto Retrigger provides the capability to have the Controller Module automatically repeat the
initiation of one of the three Dispense Mode operations (ignored by Meter Modes or Fluidic Setup Modes). This is
useful for applications such as filling X by Y matrix wells manually.
There are two Auto Retrigger modes available: Count and Infinite. Count provides the ability to auto retrigger a fixed
number of dispense operations as determined by the Auto Retrigger Count parameter. The Auto Retrigger Count
variable should be set to the desired number of total Dispense operations. The first Dispense operation must be
manually triggered. At the end of the first Dispense operation, a configurable Auto Retrigger Dwell time will cause the
unit to remain in idle until the period expires. Upon the expiration of the Auto Retrigger Dwell timer, another Dispense
operation will be automatically initiated. This process will repeat until the Auto Retrigger Count number of operations
have occurred. If using in an X by Y matrix application, the Auto Retrigger Count should be set to the value of X times
Y (i.e., the total number of wells in the matrix).
The Infinite setting provides the same feature, but the Auto Retrigger Count setting is ignored and the unit will
continue the Auto Retrigger sequence until stopped.
