Agilent Technologies Quaternary Pump 1100 Series - Manual (Page 212)

212
Introduction to the Quaternary Pump
The Low-Pressure Pump Main Board (LPM)
Figure 45 Block Diagram Low Pressure Main Board (LPM)
1
MCGV
Active inlet
valve
Valve drive
4 valve drives
Current control
Drive
Pump head Motor
Encoder
Damper
Pressure
sensor
Filter &
amplifier
A/D converter
Multiplexer
Integrator Analog output
Offset
correction
Leak sensor
Fan
Sensor
Drive
Amplifier &
ϑ
ambient measurement
pressure converter
Motor drive
Motor
control
ASIC
Data/
address
Control
ϑ
1
Pr
oces
sor
1
1