KD Scientific 900 OEM Pump - Manual (Page 7)

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KDS Microliter OEM Module
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Introduction
THEORY OF OPERATION:
The µl OEM Pump Module is designed as a highly precise, single-syringe infu-
sion/withdrawal pump module capable of low back pressure. The module includes a mecha-
nism, hardware, power supply and user interface cable. There is no keypad or display avail-
able for this module, it must interface with a computer.
Typically, the µl OEM Pump Module holds one syringe of most makes, from 0.5 µl to 1ml.
The diameter of the syringe is entered via your PC or other controller, and the internal micro-
processor drives a precision stepper motor to produce accurate fluid flow. This unit is designed
to operate inside an appropriately rated fire/electrical/mechanical enclosure or cabinet.
FEATURES
Volume
A target volume can be entered for infusion and refill independently, and the pump automati-
cally stops when this volume is reached. The pump displays an initial volume of zero and
increases as the dispense proceeds to the target volume. The target volume can be reviewed
or changed as the pump continues to operate.
Modes of Operation
Infusion
• Rate and volume settings: pump infuses to the set volume and stops.
• Rate setting only: pump runs until manually stopped, limit switches are hit, or stalls.
Withdrawal
• Rate and volume settings similar to above.
Infusion/withdrawal
• Infusion automatically followed by withdrawal. Rate and volume settings can be
made independently for infusion and withdrawal, hence the pump can infuse at one
rate and volume and then change to a different withdrawal flow rate and volume setting.
Withdrawal/infusion
• Withdrawal immediately followed by infusion. Separate settings for rate and volume can
be made for withdrawal and infusion.
• Continuous operation
• The pump cycles from infusion to withdrawal continuously. The volume is identical in
infuse and withdrawal directions.
INFUSE and WITHDRAW LIMIT SWITCHES
An infuse limit switch is located on the syringe block and an adjustable actuator is located on the
pusher block. When the pusher block actuator contacts the limit switch, infusing is stopped. Adjust
the actuator appropriately such that the syringe plunger does not bottom out in the syringe barrel.
The withdraw limit switch is located in the pulley cover, which is connected to a movable
guide rod. The guide rod is equipped with an adjustable clamp collar. When the pusher
block comes in contact with the adjustable clamp collar, the withdraw limit switch is actuated
and pusher block movement is halted. Adjust the clamp collar appropriately such that the
syringe plunger does not pull out of the syringe barrel.