Amersham Pharmacia Biotech AKTA P-920, Руководство пользователя

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In stand-alone applications, all connections except
IN
and
OUT
are
fitted at the factory. When used in ÄKTA
FPLC
chromatography
systems, the
IN
and
OUT
connections are also connected at the
factory.
A.5 Pressure monitoring
The pressure generated by the pump is continuously monitored by a
pressure transducer housed in an outlet manifold block. The pressure
transducer generates a signal which is proportional to pump
pressure. This signal is read by UNICORN via the UniNet 1
connection, and is also displayed on the front panel display. It is also
fed to the rear panel connector
Pressure analogue out 0-1 V
, where
0.1 V corresponds to 1 MPa.
The pressure transducer has two main functions:
• to continuously measure the operating pressure
• to sense excessive pressure that could damage the columns
If the pressure builds up to the set limit, the pump automatically
shuts down and an alarm is given.
A.6 Protective covers
Pump P-920 is equipped with covers to protect both the user and the
pump from accidental damage.
A perspex cover is fitted over the fluid delivery side of the pump.
The perspex cover is fixed with screws.
Metal covers are located over the moving part of the piston rods out
side the glass cylinders. These covers are held in position by spring
action.
A.7 Using an external chart recorder
The facility for recording the actual pressure at the pump outlet can
be used for recording the pressure during an overnight run and for
checking the pump function for any abnormality.
The external chart recorder output for pressure is 0–1 V, where
0.1 V corresponds to 1 MPa.
WARNING! All protective covers over internal capillaries, piston
rods and glass cylinders must be in place when running the pump.
Pump P-920
User Manual 18-1125-54 Edition AB
30
A
Reference information
18-1125-54_ab.qxd 1998-10-22 12:49 Sida 30 (1,1)