Rev. 3-11
18
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 ultrasonic processor 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.
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