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4 Operation and maintenance
2.945.0010 945 Professional Detector Vario – Conductometry
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19
4.1.4
Shutting down
If the instrument is shut down for a longer period of time, the entire IC
system must be rinsed as follows to rid it of salts in order to prevent eluent
salts from forming crystals which may cause subsequent damage.
￭
Rinse all capillaries and the Dosino (if present) with methanol/ultrapure
water (1:4).
￭
Rinse all pump tubings of the peristaltic pump with ultrapure water.
4.2
Conductivity detector
4.2.1
Maintenance
CAUTION
The conductivity detector must not be opened!
WARNING
When
rinsing the detector without column
, the pressure must not
exceed
5 MPa
.
In order to ensure this, set the maximum pressure of the high-pressure
pump to
5 MPa
in MagIC Net.
4.2.2
Remedying blockage
The conductivity detector can become blocked if the ends of the detector
inlet capillary or the detector outlet capillary are pressed together too
tightly.
If this is the case, detach and shorten the detector inlet capillary or the
detector outlet capillary by a few millimeters.
If the conductivity detector is still blocked even if the capillary ends are
free then it can be rinsed in the direction opposite the normal flow direc-
tion. Proceed as follows:
1
Detach the detector inlet capillary or the detector outlet capillary
from the system.
2
Connect the detector outlet capillary directly to the outlet of the
high-pressure pump.