Agilent Technologies 1200 Series Reference Manual page 217

Pump head
Damper
Integrator
Figure 48 Block Diagram Low Pressure Main Board (LPM)
1200 Series QP Reference Manual
4 valve drives
MCGV
Active inlet
valve
Current
control
Drive
Motor
Encoder
Motor drive
Pressur
e sensor
Analog output
Leak sensor
Amplifier & J ambient measurement
Fan
Sensor
Introduction to the Quaternary Pump
Valve drive
J
Filter &
A/D converter
amplifier
Offset
pressure converter
correction
Drive
ASIC
Motor
control
Data/
address
Control
Multiplexer
1
1
1
7
1
217