Next Advance SP570-M - Manual (Page 11)

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SP500 series OEM Programmable Syringe Pump
NE500 series manual 6 Revision 101101
5. Operation
Before the pump can be operated, the pumping data must be setup. At minimum, the
syringe inside diameter and a non-zero pumping rate needs to be set. The operation of the
pump can then be started from the TTL I/O connector, or from RS-232 computer control.
All data that is set will be stored in the pump’s non-volatile memory, meaning that the new
value will not be lost the next time that power is applied to the pump. The only exception is when the
pumping rate is changed while the Pumping Program is operating. In this case the new pumping rate will
not be stored in non-volatile memory.
In general, numeric data are floating point data consisting of up to 4 digits plus 1 decimal point, and is
referred to in the command descriptions as <float> data. For example 123.4 , 12.3 and 12.34 are
acceptable formats for floating point data.
5.1 Syringe Inside Diameter
Set with command: DIA <float>
The syringe inside diameter can only be set while the Pumping Program is stopped.
Valid syringe diameters are from 0.1 mm to 50.0 mm. If the diameter is out of this range, the response will
be ‘?OOR’. Changing the syringe diameter will not zero any current settings. Section 10.1, Syringe
Diameters and Rate Limits, is a representative list, for reference, of syringe diameters for various syringe
manufacturers and syringe sizes.
5.1.1 Default Volume Units
The units of the accumulated infusion and withdrawal volumes and the “Volume to be Dispensed” are set
according to the diameter setting:
From 0.1 to 14.0 mm Syringes smaller than 10 mL: Volume units are ‘ L’
From 14.01 to 50.0 mm Syringes greater than or equal to 10 mL: Volume units are ‘mL’
5.2 Start/Stop Triggers
Start Command: "RUN"
Stop Command: "STP"
The Pumping Program can be started or stopped from any of the different sources. The ‘RUN’ command,
or the TTL I/O Operational Trigger input. Each can control the Pumping Program’s operation.
5.3 Operating the Pump
When a start trigger is given, the Pumping Program begins to operate, starting with Phase 1. If the current
Program Phase specifies a pumping rate, the pump will begin pumping. The pumping direction will
depend on the Phase setup. The volume dispensed can be queried with the 'DIS' command.
While pumping, the pump will pump continuously in the current Program Phase, unless a “Volume to be
Dispensed” is set, or an Event trigger is set. If a “Volume to be Dispensed” is set, the Program Phase will
be complete after the set volume has been infused or withdrawn, measured from the start of the Phase.
5.4 Pumping Rate
Command: "RAT [<float> [<units>]]"
Sets/queries the pumping rate and rate units.
5.4.1 Changing the Pumping Rate and Direction While Pumping
Command: "RAT <float>"