Smartline Autosampler 3900 Manual / Handbuch V 1508 03/2007

Operation 35
General System Settings
Press :
GENERAL
SYSTEM
SETTINGS
Volume of
installed
loop:
Volume of
tubing
needle ->
valve:
Syringe
volume:
Syringe
speed:
Skip missing
vials:
Range
Comment
0-5000 µl The volume of the installed loop.
The AS 3900 uses this value for
calculations of injection volumes.
0-999 µl The volume of the tubing and needle
connected to the injection valve.
The AS 3900 uses this value for
calculations of flush and transport
volumes.
The volume of the installed syringe.
Air segment:
Headspace
pressure:
The aspirating and dispensing
speed are programmable in three
steps:
NORMAL for samples with a
viscosity almost equal to the
viscosity of water.
LOW for samples with a higher
viscosity and HIGH for samples with
a lower viscosity compared to water.
(See Table 4: Syringe speed.).
Define if the AS 3900 has to stop if a
vial is not found or continue with the
next programmed vial.
Program to stop the AS 3900
in case a vial is not found.
Inject a sample with or without an air
segment between the sample and
the wash solvent. If the air segment
is ON (YES) the AS 3900 will draw
an air segment of 5 µl before the
flush volume prior to an injection.
The air segment will not be injected
in the analytical system.
In case of µl pick-up the sample will
be preceded by an air segment,
which will be injected in the
analytical system. (see page 18)
The AS 3900 normally uses
headspace pressure in combination
with the syringe to transport sample
in to the loop. If, for some reason, no
headspace pressure is allowed, it
can be switched OFF (NO). The
compressor will always be used in
the wash position of the AS 3900.
The accuracy and reproducibility of
the AS 3900 can decrease when NO
headspace pressure is used.