Metrohm 788 IC Filtration Sample Processor User Manual
Page 148
6 Appendix
788 IC Filtration Sample Processor
140
Do not connect the dialysis cell with anything other than the
6.2744.000 PVDF compression fittings supplied. If 6.2744.010
PEEK compression fittings are used, stress cracks may appear in the
ultra-filtration cell !
4 Close ultra-filtration cell
x Insert sealing ring in the appropriate recess in top part 43
43
43
43.
x Place top part on bottom part 45
45
45
45 so that both parts lie flush.
x Using the 6.2621.070 Allen key, screw the 5 screws 46
46
46
46 right
in and tighten up.
5 Attach ultra-filtration cell
x Insert the assembled ultra-filtration cell in the cell holder 26
26
26
26
according to Fig. 1 or Fig. 11. The heads of the five screws
46
46
46
46 fit to the small holes of the cell holder.
x Connect all three tubings according to step 3 to 5 in section
2.3.9 to the corresponding inlet and outlet openings of the ul-
tra-filtration cell by using PVDF compression fittings 22
22
22
22.
6 Rinse ultra-filtration cell
x Every time the filtration membrane is changed, the remaining
air in the cell and tubings has to be removed. This can be
done by rinsing with ultrapure water.
x A completely installed 788 IC Filtration Sample Processor with
ultra-filtration cell is required for processing the following
steps. The rinsing solution (e.g. ultrapure water) is stored in a
300 mL PE bottle on the special beaker position 1. The 788 IC
Filtration Sample Processor is online and in normal state. The
pump is switched of (display: 'PUMP–') and the 788 is ready
for use (display: 'ready').
x Turn the sample rack to position the beaker with the rinsing
solution under the needle by pressing <MOVE> followed by
choosing 'spec.1' with <SELECT>.
x Lower the lift into rinse position with <LIFT> and <SELECT>
'rinse'
x Turn on the pump by pressing <PUMP>. All connected tub-
ings and the ultra-filtration cell will be rinsed.
x After adequate time (e.g. 5 min.), switch off the Pump
(<PUMP>) and raise the lift to its rest position by pressing
<HOME>.