Metrohm 850 Professional IC Anion MSM-HC - LP-Gradient - Manual (Page 50)

3.12 High pressure pump
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850 Professional IC Anion MSM-HC LP Gradient
5 Fastening screws
For fastening the pump head. 6 Inlet valve holder
7 Pump head input capillary
PEEK capillary at the input of the pump
head. 8 Pressure screw
For connecting a PEEK capillary to the cou-
pling (20-
9 ).
9 Coupling
For the connection of the eluent path at the
input of the high pressure pump. Can be
ordered together with the pressure screw
(20-
8 ) under the number 6.2744.230.
10 Deaerating capillary
For aspirating the eluent when deaerating
the high pressure pump (see Chapter
3.12.3, page 41).
11 Purge valve
For deaerating the high pressure pump.
With rotary knob in the center and pressure
sensor.
12 Connection capillary
For connecting the inline filter (see Chapter
3.13, page 43).
13 Connection capillary
Connects the output of the pump head with
the purge valve.
3.12.2 Connecting low pressure gradient
Note
The eluent aspirating capillary is already installed on the high pressure
pump in the newly delivered instrument. The connector must be modi-
fied in order to use the instrument as a low pressure gradient.
Connecting low pressure gradient
1 Removing the connection tubing eluent degasser – high
pressure pump
￭ Loosen the clamping screw at the output of the eluent degasser
and remove the connection tubing.
￭ Loosen the pressure screw on the inlet valve holder (20-2) and
remove the connection tubing together with the coupling (20-9)
and the pump head input capillary (20-7).
2 Connecting mixing coil for low pressure gradients
￭ Screw the end of the mixing coil for low pressure gradients (21-3)
with the shorter pressure screw (21-2) to the inlet valve holder
(21-1).