D Series Syringe Pumps
Section 3 Basic Programming and Operation
3-19
3.12.2 Preparation Before programming the controller to accept the analog signal,
you must know the maximum flow rate (constant flow) or the
maximum pressure (constant pressure).
Note
The high and low limits you enter cannot exceed the pump
specifications: Normal input = 10V.
Note
For the 4-20ma input option the negative output wire con-
nects to DIGITAL GROUND. The positive output wire connects
to ANALOG INPUT 1-4.
To determine the analog voltage range, use the formula
explained below:
where:
FS = Maximum flow rate or Maximum pressure
(Full Scale): This is the same value entered when setting LIMITS,
as described in Section 3 of your user manual, for MAX PRESS or
MAX FLOW.
V = Volts per unit of flow or pressure
U = Incremental unit of flow or pressure
Vmax = Maximum input voltage
Note
For the 4-20ma input option The maximum flow or pressure
sets the limit at 20ma. No other formula applies.
3.12.3 External Control for
Refill
The refill option allows you to set the refill rate, or set the pump
to automatically refill when a certain volume is reached. From
Menu 2, the system can be programmed to automatically refill a
pump based on an external analog signal, with a range of
0 to 11.5 volts.
To access this feature, press MENU > MORE (A) > EXTERNAL (3).
FS
V
U
----
Vmax=
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