Metrohm 833 IC Liquid Handling Unit - Manual (Page 96)

9 Troubleshooting - maintenance
830 IC Interface / Gebrauchsanweisung 8.830.1001
88
3 Adjust actuator step
• Turn setting screw 12 as shown in Fig. 27 a little in the
required direction so that the rotor comes to rest in a valid
position.
• Activate <STEP> in the software.
• Check the position of the rotor in all 3 possible settings as
shown in Fig. 27.
• Repeat the setting procedure until the rotor is in a valid
position in all of the 3 possible settings. Always wait for at
least 10 s before triggering the next STEP command.
optimal zulässig zulässig unzulässig unzulässig
Fig. 27: Adjusting the actuator step
9.2.7 Dialysis cell
The dialysis membrane is very sensitive to contact and drying out, so
avoid touching it with your fingers and ensure that the membrane never
dries out when inserted in the cell.
The working life of a dialysis membrane is approx. 1 week if used
frequently. It should always be exchanged if there are any indications
that the yield has become reduced or that it is being blocked.
Follow the instructions for the installation of the dialysis cell (Section 7.4
and 7.5), its shut down (Section 9.2.3) and for replacement of the
dialysis membrane (Section 9.2.7.1).