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6.1.2.1. High Pressure Limit
High pressure limit can be set in the range
1.0-30.0 MPa (150-4350 psi)
. Minimal value of
high pressure limit is 1 MPa (150psi) higher than value of low pressure limits. Default value is
24 MPa (3480 psi).
Example:
If the value of low pressure limit is for example 10 MPa (1450 psi), value of high
pressure limit can be set in the range 11-30 MPa (1600
–4350 psi).
This function is used for column protection. Limit should be set approximately 20% higher
than normal pressure in the column.
6.1.2.2. Low Pressure Limit
Low pressure limit can be set in the range
0.0-29.0 MPa (0-4210 psi)
. Maximal value of low
pressure limit is 1 MPa (150 psi) lower than value of high pressure limit. Default value is 0 MPa
(0 psi). If the value is set on 0 MPa (0 psi), the control of low pressure limit is deactivated.
Example:
If the value of high pressure limit is for example 10 MPa (1450 psi), value of low
pressure limit can be set in the range of 0-9 MPa (0-1310 psi).
This function is used for unattended pump run, to avoid uncontrolled outflow of mobile phase
in case of capillaries disconnection.
6.1.3. Concentration
Concentration of mobile phase can be set for each valve in volume percentages. The value
of concentration is derived for valve
A
. Using arrows left and right moves with cursor, arrows up
and down change value of concentration and pressing
ENTER
confirms set value of concentration.
Default value is 100 % A.
Setting
a
number
of
used
valves
can
be
performed
in
Menu/Preferences/Gradient/Valves used
. Minimal number of used valves is two.
6.1.4. Solvents Volume
Volume (mobile phase) for valves (
A
,
B
C
a
D
) can be set in range
0-10000 ml
. Setting of
warning and volume limit can be done in
Menu/Preferences/Solvents/.
Default value is 0 ml.
6.2. Preferences
Here can be optimized pump functions to satisfy any user needs.
6.2.1. General
In these sub menus can be set pressure units, display brightness, sounds and pump mode.
6.2.1.1. Pressure Units
Pressure unit can be set to
MPa
(megapascal),
psi
(pound-force per sq. inch) and
bar
(bar).
1 MPa=10bar=145psi. Default pressure unit is MPa.
Note:
The
PSI
unit pressure value are automatically rounded to tens (ie. 145 psi
rounding is 150 psi).
