DAD 6.1L/DAD 2.1L/MWD 2.1L user manual V6700, version 3.2
Maintenance and Care
43
Result
The flow cell performance and stability improve noticeably.
Next steps
Flush the flow cell with the solution that is going to be used in your next
application. Afterwards you can start your application.
Replacing the Flow Cell
UV light will cause the flow cells to become blind with time (solarization),
making them no longer suitable for use. The manufacturer recommends
replacing the flow cell after about 6000 operating hours.
Prerequisites
The capillaries are disconnected.
The device is switched off.
Eye injury
Irritation of retina through UV light. Concentrated UV light can leak out
from the flow cell or the fiber optic connectors.
Switch off the device or the lamps.
Performance decrease
Any components in the light path like fiber optic ends become contami-
nated, if being touched with the fingers.
Avoid touching the ends without gloves.
Use alcohol and a cotton bud for cleaning.
Next Steps
Connect the capillaries.
Replacing the Lamps
Replace the lamp if it malfunctions or its intensity is low.
DAD 6.1L, DAD 2.1L,
MWD 2.1L
The recommended operating time of the deuterium lamp is 2000 hours.
DAD 6.1L
The recommended operating time of the halogen lamp is 1000 hours.
Final Rinsing Process
1. Identify the point where subsequent cleaning cycles no longer
improve the performance of the flow cell.
2. Flush the unit with ultrapure water for a period of at least 15 minutes
to ensure all cleaning solutions have been completely removed and
there are no persistent residues that might affect flow cell performance
or stability.
Process
Steps
Figure
1. Press the release lever
1
down.
2. The flow cell is being released
and can be pulled out.
3. Push in the new flow cell until it
locks into place.
Fig. 30
releasing the flow cell
1
