Agilent 1200 Preparative Pump User Manual 151
Configuring the Preparative Pump
9
Preparative Pump Main Board (PPM)
Fan Drive
The revolution of the fan is controlled by the main processor depending on the
internal heat distribution in the preparative pump. The fan provides a PWM
signal which is proportional to the revolution. This fan status signal is used for
diagnostics.
Seal Wash Pump Drive
The drive comprises a current control and full bridge driver for the seal wash
pump.
Pump head ID Module
The pump head ID Module is used to write pump head specific information
onto a tag that is installed in the pump head.
Index Board
The Index board is used to sense the movement and positioning of the pump
drive. It also comprises calibration information of the drive.
Electronic Fuses
The valve circuit is electronically fused on the board. Any error on the board
or shortages of the valve will activate the electronic fuse that will switch OFF
the supply voltage. This prevents the damage of components.
Onboard Battery
An onboard lithium battery buffers the electronic memories when the
preparative pump is turned off.
For safety information on lithium batteries, see “Lithium Batteries
Information” on page 173.
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