Operating instructions

Charged Aerosol Detectors
Corona Veo and Corona Veo RS
Operating Instructions Page 61
5. Select Setpoint and set the pressure set point to the desired value.
6. Select the Save soft key and then the Exit soft key to return to the Main Menu.
7. Wait until the gas pressure has stabilized and reached the set point. Monitor the gas
pressure (→ see below).
Monitoring the Gas Pressure
To monitor the gas pressure on the detector display:
1. From the Main Menu, select the Run Mode soft key.
2. In the Run Mode Menu, select the Diagnostics soft key.
3. On the Diagnostics screen, monitor the Gas Pressure reading.
5.4.2 Preparing the System
Before using the detector, flush the LC system thoroughly prior to sample analysis.
1. Remove any analytical column from the system.
2. Flush the system with a starting solution of 80 % water and 20 % methanol without the
detector until the system is free of any other liquid composition.
Tip: When you use an online degasser in your system, make sure that you flush
each channel of the online degasser before you use them for sample
analysis with the detector.
3. Pre-program all temperature-controlled devices, such as the column oven, to the
temperature required for the application.
4. Switch the solvent to the mobile phase required for your application
5. Flush the system without the detector with the mobile phase for your application until
the system is free of the starting solution (80 % water/20 % methanol).
6. Re-install the analytical column.
7. Flush the system without the detector until the internal column volume has been
replaced with fresh mobile phase.
8. Monitor the pump pressure. Verify that the reading is correct for the application and is
stable.