Metrohm 850 Professional IC Cation Manual - Manual (Page 81)

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4 Operation and maintenance
850 Professional IC– Cation
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4.9 Sample degasser
4.9.1 Operation
If you are working with sample degassing, the longer "transfer time" (see
Ascertaining the transfer time, page 71) means that it is also necessary to
rinse for longer (with the subsequent sample). The rinsing time should be
at least 3 times the "transfer time" so as to minimize the carry-over
effects. The "transfer time" itself depends on the pump capacity, total
capillary volume and volume of gas removed (i.e. the amount of gas in the
sample).
Note
When using the sample degasser, the rinsing time extends by at least 2
minutes.
4.10 Injection valve
4.10.1 Protection
To prevent contamination of the injection valve, a 6.2821.120 inline filter
(see Chapter 2.11, page 35) should be mounted between the high pres-
sure pump and the pulsation damper.
4.11 Conductivity detector
4.11.1 Maintenance
Caution
The conductivity detector must not be opened!
Warning
When rinsing the detector, the pressure must not exceed 5 MPa. In
order to ensure this, the maximum pressure of the high pressure pump
must be set to 5 MPa in MagIC Net.
If the conductivity detector is blocked, you should first of all check
whether the blockage results from the capillary ends being pressed
together too firmly. In this case, shorten the detector input capillary (26-3)
or the detector output capillary (27-2) by several millimeters.