DAD 6.1L/DAD 2.1L/MWD 2.1L user manual V6700, version 3.2
Maintenance and Care
41
Next Steps
Select a storage location according to the requirements, which are listed in
the according chapter of this manual.
Storage
Pay attention that all hoses and capillaries have been emptied or filled with
flushing solution (e. g. isopropanol) before storage. To prevent algae forma-
tion, do not use pure water. Close all inputs and outputs with cap fittings.
Pay attention to the ambient conditions for storage’Technical Data’ on
page 46..
Disconnecting the Power Supply
Prerequisites
The device has been switched off.
1. Pull the power plug out of the socket and afterwards out of the device.
2. Pack the power cable together with the device.
Next Steps
Disconnect further electrical connections. Remove the flow cell and pack the
device for transport or storage.
Cleaning the Flow Cell
Increased noise of the baseline and reduced sensitivity can be a Increased
noise of the baseline and reduced sensitivity can be a result of a dirty flow
cell. Often it is sufficient to rinse the flow cell to restore optimal sensitivity.
Basic Cleaning
The following solvents are recommended for rinsing:
dilute HCl (1 mol/L)
1 mol/L NaOH aq.
Ethanol
Acetone
Tools
Syringe
Performance decrease
Oil drops can contaminate the flow cell.
Do not use compressed air for drying.
Process
1. Fill the syringe with eluent.
2. Inject it into the inlet of the flow cell and allow it to act for 5 minutes.
3. Repeatedly flush with syringe and water.
4. Remove the flow cell from the detector and use a nitrogen stream to dry
it.
Next Steps
Check if the baseline noise has disappeared.
Process
Process
1. Unscrew the eluent supply lines and close the open connectors with
hole plugs.
2. Disconnect the detector from the system and close the open connec-
tor of the flow cell with a hole plug.
Process
Process
1. Pull the power plug out of the socket and afterwards out of the device.
2. Pack the power cable together with the device.
