Rev. 4-16a
14
8. Maintenance
It is recommended to periodically inspect the unit, both visually and physically, to insure optimum and
safe performance. This inspection should be scheduled as a routine maintenance procedure, done with
the unit power OFF and with the unit unplugged from the AC power source.
Long exposure to acids or caustics results in corrosion of metal parts or components. Check the
generator, converter, and cables periodically for any signs of rust or discoloration. If discoloration is
found, move the unit away from the source of the contaminant.
Examine the condition of the high voltage cable that attaches the converter to the generator. Inspect
the wire insulation for damage, such as wear, burning from hot plate contact or breakage from extended
use or rough handling. In general use, the cable assembly should not be used to carry the converter or
pull it toward the user. Make certain the cable always has slack and is never tensioned. If necessary,
move the generator or converter assembly closer to one another to accomplish this.
WARNING: Do
not use a cable with broken end connections, exposed wires or frayed insulation. High voltage
is present in the cable and will pose a shock hazard. Do not touch the converter assembly until
the power switch is off and the unit is unplugged.
Microtip/ Probe Maintenance
Ultrasonic processors create high intensity vibration which puts stress on the converter and horn
assembly. The sides and end of the probe must
never
be allowed to come in contact with anything but
the solution. When using a Microtip, the stress resulting at the point of contact with the vessel could
cause the Microtip to fracture.
Proper care of the probe is essential for dependable operation. The intense cavitation will, after usage
for period of time, cause the tip to erode, and the power output to decrease. The smoother and shinier
the tip, the more power will be transmitted into the sample. The vibrations may also cause the probe tip
to loosen over time or the threaded connection to accumulate debris.
Note:
A loose probe will usually
generate a loud piercing or squealing sound.
For that reason,
it is recommended that a preventative maintenance schedule be adopted to
examine the unit at regular intervals.
The schedule should depend on frequency of use. Weekly
maintenance schedules are recommended for units used frequently or monthly for those used
infrequently. The tip must be examined for excessive wear and to ensure that the threaded connection
is clean and attached properly to the convertor. Use a cotton swab and alcohol (i.e. ethanol, isopropyl,
etc.) to clean the threaded mating surfaces.
When excessive wear (corrosion/pitting of the probe tip) is detected the probe should be
replaced with a new one.
WARNING: Never hand tighten probes or horns onto the convertor; properly tighten them with
the appropriate Wrench Set.
