5.2 Maintenance and servicing
792 Basic IC
151
x
Set the flow at the high-pressure pump to 0.5 mL/min and
rinse the suppressor unit with 1 mol/L H
2
SO
4
for 5 to 10 min.
x
As the pressure falls, slowly increase the flow at the high-
pressure pump to 2 mL/min. Do not exceed a maximum
pressure of 2 MPa (20 bar).
x
Switch off high-pressure pump.
x
Switch suppressor to the next position using the
button.
x
Connect the inlet capillary
77
77
77
77
marked "H
2
O" to the inlet capil-
lary
18
18
18
18
using coupling
26
26
26
26
(see
Fig. 9
and
Fig. 14
).
x
Set the flow at the high-pressure pump to 0.5 mL/min and
rinse the suppressor unit with 1 mol/L H
2
SO
4
for 5 to 10 min.
x
As the pressure falls, slowly increase the flow at the high-
pressure pump to 2 mL/min. Do not exceed a maximum
pressure of 2 MPa (20 bar).
x
Switch off high-pressure pump.
3 Connect suppressor to IC system
x
Connect inlet capillaries
77
77
77
77
and
78
78
78
78
to the peristaltic pump
(see
section 2.8.4
).
x
If the pressure problems persist, replace the suppressor rotor
(see
section 5.2.9
).
5.2.8
Cleaning the suppressor
It may be necessary to clean the suppressor in the following cases:
x
High counter pressure on the suppressor connection
tubing
x
Irremediable blockage of the suppressor (the suppres-
sor can no longer deliver solutions)
x
Irremediable obstruction of the suppressor (the sup-
pressor can no longer be switched to next position)
To clean the connection piece and the rotor, proceed as follows (see
Fig. 19
):
1 Disconnect suppressor from IC system
x
Disconnect input capillary
75
75
75
75
of the suppressor module
39
39
39
39
from the separating column
66
66
66
66
(see
Fig. 14
).
x
Disconnect output capillary
76
76
76
76
from inlet capillary
37
37
37
37
.
x
Disconnect inlet capillaries
77
77
77
77
and
78
78
78
78
from the filter units
28
28
28
28
(supply from peristaltic pump).
Summary of Contents for 2.792.0020 Basic IC
Page 53: ...2 Installation 792 Basic IC 44...
Page 197: ...6 Appendix 792 Basic IC 188...
