Owner's manual

NEXT>>>ADVANCE www.nextadvance.com SP500 series OEM Programmable Syringe Pump

NE500 series manual 18 Revision 101101

This example demonstrates a Pumping Program whose control depends on an external sensor. Assuming a

pressure sensor that is configured to detect a high pressure point and a low pressure point, the Pumping

Program individually selects whether it will react to the high or low pressure point.

The “Program Output” pin on the TTL I/O connector (pin 5) is used to select the high or low pressure

point. When low, the low pressure point is selected (PHASE 01), and when high, the high pressure point

is selected (PHASE 05). The Program begins by infusing continuously at 10.0 ml/hr (PHASE 02), while a

background trap is set for the low pressure point (PHASE 03). To create a delay when the pressure sensor

is switched from high pressure to low pressure when the “Program Output” pin is set, a small volume is

pumped (PHASE 02, 06) before the background traps are set.

When the low pressure trap is triggered, the pump sets the high pressure trap (PHASE 07) and begins to

increment the flow rate. The flow rate is incremented in 1.0 ml/hr steps with every 0.25 ml dispensed

(PHASE 08-10). If the high pressure trap hasn’t as yet been triggered, the flow rate will max out at 25.0

ml/hr while waiting for the high pressure trap (PHASE 11). When the high pressure point is reached, the

pump immediately will drop down to 10.0 ml/hr (PHASE 02), and once again wait for the low pressure

point.

Phase Function

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