Schambeck SDS 9414I, Руководство по эксплуатации

Страница: 9 / 45

SDS 9414i HPLC Pump
Version: 2.2 (July 2007) Page: 9 / 45
While the delivery piston pushed the solvent volume out, the compensation piston, located on
the pressure side, collects half of the volume. During return movement of the delivery piston,
the collected volume is pumped from the compensation. The microprocessor controlled speed
regulation leads to a highly stable speed of the D.C. motor. Contrary to standard regulators,
the microprocessor is able to correct continuously the compressibility of the eluents through a
computerized program. This results in a constant volume delivery throughout the entire
delivery range.
The microprocessor technology also offers the possibility to handle the programming,
application and controlling of an instrument in a simple manner. Through the alphanumeric
display the instrument parameters are shown in clear letters. The user can easily control or
change the data. To simplify operation, the function keys are kept at a minimum.
There is basically the choice between two operation modes. The delivery with “constant flow”
and the delivery with “constant pressure”. According to the individual modes, the following
parameters can be programmed:
§ Constant Flow in ml/min
§ Constant pressure in MPa
§ Min. Pressure Threshold
§ Max. Pressure threshold
§ Maximum Flow
§ Compressibility Factor
§ Max. Run Time
§ Delay Time
§ Programmable Start Delay
§
Programmable Stop Delay
The HPLC pump is equipped with a built-in diagnostic system. This continuously controls the
following parameters:
§ Power Failure
§ Program Memory
§ Max./Min. Pressure
§ Max. Flow
§ Motor Function
Illogical data entered by the operator will be ignored by the processor’s logic control and
signalized by flashing the display.