D Series Syringe Pumps
Section 3 Basic Programming and Operation
3-10
3.8 Front Panel Keys In addition to the menu options, certain functions and modes are
selectable from the front panel keyboard.
3.8.1 CONST PRESS and
CONST FLOW
These keys place the system in constant pressure mode or con-
stant flow mode, respectively. Information for these operating
modes can be found in Section 3.10.
3.8.2 PRGM GRAD This key is used to place the pump system in gradient mode. For
complete information about gradient programming, refer to
Section 4 Gradient Pumping for Pressure, Flow, and Concen-
tration Modes.
3.8.3 HOLD The HOLD key is used while a gradient is running. When HOLD
is pressed, the program clock freezes and current gradient
parameters are maintained.
To continue the gradient, press HOLD or RUN.
3.8.4 RECALL The RECALL key can only be used when the pump(s) are stopped
or when in HOLD mode. The RECALL key is used to recall a pre-
viously programmed gradient. When you select this option, the
controller automatically loads the gradient and switches the
pump to program gradient mode.
1. Press RECALL and use the number keys to enter the num-
ber name of the gradient you wish to recall. Press ENTER.
2. If you enter a number of a gradient that does not exist, the
controller briefly displays the message “FILE NUMBER
DOES NOT EXIST.” It then assumes you will be creating a
new gradient under that number and displays the program
gradient run screen.
3.8.5 STORE The STORE key is operational in the programmed gradient mode.
It is used to save the program gradient parameters and exit the
programming (parameter entry) mode.
3.8.6 REFILL The REFILL key manually places the pump in refill mode.
3.8.7 LIMITS The controller allows the user to set the minimum and maximum
flow rate limits, the minimum and maximum pressure limits,
and the maximum rate the pump will run while controlling the
pressure in constant pressure mode.
• When using a single controller to operate multiple
pumps, you need to select the appropriate pump before
setting any pump parameters. The available pumps will
be displayed above the softkeys. These selections corre-
spond with the connector that the pump control cable is
plugged into on the rear panel of the pump controller. To
select a pump, press the softkey under the pump desig-
nation. The top line of the screen will indicate the
currently selected pump.
• The maximum and minium limits you set cannot exceed
the pump specifications.
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