GE AKTA avant User Manual page 79

Function of system and sample
pump pressure monitors
The pressure monitor of the System pumps measures the system pressure after these
pumps, called System pressure in UNICORN. The pressure monitor of the Sample pump
measures the system pressure after this pump, called Sample pressure in UNICORN.
For instructions on how to calibrate the pressure monitors, see Section 7.7.2 Calibrate
the pressure monitors, on page 323.
Function of pressure monitors
integrated in the Column valve
The pressure monitors integrated in the inlet and outlet ports
of the Column valves V9-C and V9H-C measure the pressure
just before the column, pre-column pressure (A), and the pres-
sure just after the column, post-column pressure (B).
The delta-column pressure (C), which is the pressure drop over
the column, is calculated as the difference between the pre-
column pressure and the post-column pressure.
Pressure alarms can be set for both the pre-column pressure
and the delta-column pressure. Pressure control of the flow
may be based on either the pre-column pressure or the delta-
column pressure.
For instructions on how to calibrate the pressure monitors, see
Section 7.7.2 Calibrate the pressure monitors, on page 323.
ÄKTA avant User Manual 29035184 AE
3 Standard instrument modules
3.8 Pressure monitors
PreC
P
PostC
P
A
C
(= A-B)
B
79