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Model 3480 Electrospray Aerosol Generator
AC Power Connector........................................................... 3-5
Filtered Air Inlet ................................................................. 3-5
CO
2
Inlet ............................................................................ 3-5
Internal Components ............................................................ 3-6
Capillary ............................................................................ 3-6
Electrospray Chamber........................................................ 3-6
High-Voltage Fitting and Shield .......................................... 3-6
Power Supply ..................................................................... 3-7
Main PCB ........................................................................... 3-7
High-Voltage Supply Module .............................................. 3-7
Interlock Switch ................................................................. 3-8
Filters ................................................................................ 3-8
CHAPTER 4 Operating the Electrospray ............................... 4-1
Preparing Samples ................................................................ 4-1
Preparing a Buffer Solution ................................................ 4-2
Measuring and Adjusting Conductivity............................... 4-2
Measuring and Adjusting pH .............................................. 4-3
Typical Solutes ................................................................... 4-3
Starting Up the Electrospray ................................................. 4-5
Generating Aerosols .............................................................. 4-6
Changing Samples ................................................................ 4-8
Shutting Down the Electrospray............................................ 4-8
CHAPTER 5 Maintenance..................................................... 5-1
Periodic Maintenance ............................................................ 5-1
Purging the Capillary.......................................................... 5-1
Cleaning the Orifice Plate ................................................... 5-3
Cleaning the Aerosol Exit Port ............................................ 5-4
Cleaning the Viewing Window Lens .................................... 5-4
Replacing the Ionizer .......................................................... 5-5
Cleaning the Electrospray Chamber ................................... 5-6
Performing an Air Leak Test ............................................... 5-8
Cleaning the Pressure Chamber ....................................... 5-10
Special Maintenance ........................................................... 5-12
Removing the Capillary .................................................... 5-12
Cleaning the Capillary Tip ................................................ 5-14
Installing the Capillary ..................................................... 5-14
Adjusting the Position of the Capillary Tip ........................ 5-15
Adjusting the Position of the Capillary and the
Platinum Wire in the Pressure Chamber........................ 5-15
Reversing the High-Voltage Polarity .................................. 5-16
Cleaning the Pressure Regulator ...................................... 5-19
Cleaning the Rotameters .................................................. 5-19
Replacing the Filters......................................................... 5-19
Replacement Parts .............................................................. 5-19
CHAPTER 6 Troubleshooting................................................ 6-1
Electrospray Operation is Unstable ....................................... 6-1
Unplugging the Capillary....................................................... 6-3
Applying Back Pressure to the Capillary ............................. 6-3
CHAPTER 7 Contacting Customer Service............................ 7-1
Technical Contacts................................................................ 7-1
Returning the Electrospray for Service .................................. 7-1
