5–16
Model 3480 Electrospray Aerosol Generator
Obtain a short piece of a non-conductive piece of hollow tubing
or a similar object to place in the bottom half of the pressure
chamber to allow the smaller vial to be placed securely.
Cut the platinum high-voltage wire to length or replace the
platinum high-voltage wire with a new platinum wire of desired
shape and size. To modify or replace the platinum high-voltage
wire, use the instructions earlier in this chapter titled “
” to remove the capillary and the high-
voltage fitting. The platinum high-voltage wire is soldered to the
inside of the brass pin on the bottom of the high-voltage fitting
and can be removed by heating with a soldering iron. Finally,
solder the new platinum wire to the inside of the brass pin and
replace the high-voltage fitting.
Reinstall the capillary using the instructions earlier in this
chapter titled “
.”
Reversing the High-Voltage Polarity
C a u t i o n
The electronic circuits within this instrument are susceptible to
electrostatic discharge (ESD) damage. Use ESD precautions to avoid
damage.
Use only a table top with a grounded conducting surface.
Wear a grounded, static-discharging wrist strap.
W A R N I N G
High voltage is accessible in several locations within this instrument.
Make sure you unplug the power source before removing the cover or
performing maintenance procedures.
Note:
Refer to Figure 5-6 and note the location of the high-voltage
power supply to determine whether a high-voltage module has
a positive or negative polarity. In a positive module (shown),
the high-voltage power supply is located on the exposed side
of the high-voltage PCB. In a negative module, the high-voltage
power supply is located on the opposite side of the high-
voltage PCB.
