Next Advance SP1800 - Manual (Page 18)

NEXT>>>ADVANCE www.nextadvance.com
SP1600/1800 Programmable Syringe Pump
Publication #1200-02 13 9/15/04
6. 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 keypad, TTL I/O connector, or from RS-232
control. From the keypad, pressing the ‘Start / Stop’ key will start the pump operation.
6.1 Syringe Inside Diameter
The syringe inside diameter can only be set while the Pumping Program is stopped. Use the arrow keys to
set the diameter value. While the diameter value is being set, the ‘mm’ LED will blink. The new
diameter value is stored after pressing any non-arrow key, or after a 2 second delay.
Valid syringe diameters are from 0.1 mm to 50.0 mm. If the diameter is out of this range, the display will
show ‘oor’. Pressing any key restores the diameter display to its previous value. Changing the syringe
diameter will not zero any current settings. Section 11.1, Syringe Diameters and Rate Limits, is a
representative list, for reference, of syringe diameters for various syringe manufacturers and syringe sizes.
6.1.1 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: Volume units are ‘ l’
From 14.01 to 50.0 mm: Volume units are ‘ml’
6.2 Start/Stop Triggers
The Pumping Program can be started or stopped from any of the three sources. The keypad ‘Start/Stop’
key, RS-232 ‘RUN’ command, or the TTL I/O Operational Trigger input. Each can control the Pumping
Program’s operation.
6.3 Operating the Pump
When the “Start/Stop” key is pressed, the Pumping Program begins to operate, starting with Phase 1. If
the current Program Phase specifies a pumping rate, the pump will begin pumping, and the ‘Pumping’
LED will be lit. The pumping direction will depend on the Phase setup. The display will show the
“Volume Dispensed” with a volume units LED (‘ml’ or ‘
l’) and the ‘Dispensed’ LED lit.
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be complete after the set volume has been infused or withdrawn, measured from the start of the Phase.
Pressing the ‘Volume’ or ‘Diameter’ keys will display the current “Volume to be Dispensed” or the
syringe diameter setting while the key is held..
6.4 Changing the Pumping Rate and Direction While Pumping
Except with some complex Pumping Programs, the pumping rate can be changed while the pump is
operating. To change the pumping rate, momentarily press the ‘Rate’ key. While the pumping rate is
displayed, press the arrow keys to change the rate. The rate units will blink while the rate is being
changed. If the arrow keys are not pressed, the display will return to the “Volume Dispensed” display
after a 2 second delay. Rate units can not be changed while pumping.
The new rate is stored after a 2 second delay or by pressing a non-arrow key. If the new rate is within the
operating range of the pump, the display will blink and the new rate will be stored in the current Program
Phase and the pump begins pumping at the new rate. If the new rate is out of the operating range of the
pump, the display will show
nn
. Pressing any key clears the error message.
The pumping direction can be changed while pumping if the “Volume to be Dispensed” is 0.0 (off).
Pressing the direction key will immediately change the pumping direction and store the pumping direction