Next Advance SP570-M - Manual (Page 12)

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SP500 series OEM Programmable Syringe Pump
NE500 series manual 7 Revision 101101
Except with some complex Pumping Programs, the pumping rate can be changed while the pump is
operating. To change the pumping rate while pumping, use the 'RAT' command to send a new rate. A
new rate set while pumping will not be stored in non-volatile memory. Rate units cannot be changed
while pumping.
If the new rate is valid, it will take affect immediately.
The pumping direction can be changed while pumping if the “Volume to be Dispensed” is 0.0. The
direction command "DIR" will immediately change the pumping direction and store the pumping direction
in the current Program Phase. Also changing the pumping direction changes the accumulated “Volume
Dispensed” according to the new pumping direction.
5.5 Pumping Direction
Command: "DIR [INF | WDR]
Sets the direction of pumping to Infuse (INF) or Withdraw (WDR)
5.6 Dispense Volume Target and Continuous Pumping
Command: "VOL [<float>]
To set a dispense volume, use the "VOL" command. The current Pumping Phase will continue to pump,
infusing, or withdrawing, until the set volume has been pumped.
For continuous pumping, set the volume target to 0: Command "VOL 0".
5.7 Volume Dispensed
Volume is computed based upon the syringe inside diameter setting. The volume is accumulated
separately for infusion and withdrawal. The volume dispensed for infusion and withdrawal can be queried
with the "DIS" command.
The “Volume Dispensed” accumulations, for infusion and withdrawal, are reset to 0 when:
A) The pump is powered on.
B) The syringe diameter is changed.
C) From the RS-232 clear “Volume Dispensed” command (CLD).
D) The accumulated Volume Dispensed rolls over from 9999 to 0.
5.8 Resuming When Paused
If the Pumping Program is stopped before the completion of the Pumping Program, the response prompt
will change to 'P', indicating that the Pumping Program is paused. While paused, starting the pump again
will resume the Pumping Program where it was stopped. This means that the Pumping Program will
continue at the point in the Phase where it was stopped and the ‘Volume to be Dispensed’ will still be
referenced from when the Program Phase first started.
Pause is exited by sending a stop command "STP", or changing any setting. When the Pumping Program
is started again, it will start from the beginning (Phase 1).
5.9 Pump Stalled
Model: SP501 only
When the operation of the motor is impeded due to excessive force needed to drive the syringe, the pump
will stop, pausing the Pumping Program, and a stall alarm will occur.
The buzzer will sound continuously if alarms are enabled. Also, if the RS-232 Safe Mode is enabled, an