Graymills BTU Benchtop Ultrasonic - Manual (Page 3)

795-91322
09/24/08
Graymills Corporation – 3705 N. Lincoln Ave. / Chicago, IL 60613 – Phone: 773.477.4100 Fax: 773.477.8673 – www.graymills.com
2) Refer to the APPLICATIONS section of this manual for guidance as to the required cleaning time for your application. The
cleaning time will be determined after cleaning a few trial loads and evaluating the resulting cleanliness level. Typical cleaning
times will range from 3 to 6 minutes. Severely contaminated parts may require longer cleaning times. When starting out,
NEVER leave parts in the ultrasonic tank unattended longer than 4 or 5 minutes. Painted or polished part surfaces may
become damaged by excessive exposure to the ultrasonics.
3) Placing the lid on the tank will reduce any objectionable noise while cleaning parts. This will also reduce heat losses and the
discharge of odors and vapors into the work environment.
4) Parts in the basket should be arranged so that the cleaning fluid can flow freely around all surfaces of the work and drain
thoroughly after the cleaning process. Avoid over-filling the basket with too many layers of parts.
5) Concave or hollow parts should be placed so that they fill completely while submerged and drain completely after cleaning.
Gentle tumbling while submerged or draining can often facilitate this process.
RINSING AND DRYING
1) The workload may require rinsing to flush away any contaminants that may re-deposit on the parts as they are withdrawn from
the cleaning tank. Also, check cleaning solution instructions to see if they recommend rinsing. The parts may be immersed in a
tank of clean water or held under a running water flow to rinse away any loosened debris. A heated rinse may be required to
completely remove any remaining detergent residues.
2) If dry parts are required after cleaning, the workload may be blown dry or placed in a heated drying chamber to remove any
remaining water. If compressed air is used to blow off the parts, it should be clean, oil-free and filtered to avoid re-
contaminating the cleaned parts. Follow Safety Instructions for use of compressed air blowing.
MAINTENANCE
This machine utilizes dangerous high voltage to operate the ultrasonic transducers. Only qualified trained personnel should
attempt any repairs or servicing of the ultrasonic components. Disconnect all power before servicing the ultrasonic
generators or tank heaters.
If in doubt about any servicing procedures, contact Graymills’ customer service department at (773) 248-6825.
Be sure to unplug the power cord and allow the tank to cool for 15 minutes before draining the fluid. Operating the heaters or
the ultrasonics with a dry tank or with insufficient fluid level will permanently damage the heaters and/or the ultrasonic
transducers.
CLEANING TANK
The cleaning tank should be cleaned periodically to remove accumulated debris from the sides and bottom. This should be done at
least weekly, or more often if soil accumulation is high.
1) Place the HEATER and ULTRASONIC GENERATOR switches in the OFF position.
2) Unplug the power cord from the electrical outlet.
3) Open the drain valve and allow the tank to empty.
4) Using a stiff brush or sponge, wash out the tank interior using a mild detergent solution. Rinse thoroughly and repeat as
needed.
Avoid the use of abrasive materials such as scouring pads, scouring powder, scraping tools, etc. on the tank interior.
Damaging the finish on the tank walls or bottom will shorten the life of the ultrasonic tank and may lead to the
development of pinhole leaks over time.
5) Close the drain valve and re-fill the tank with fresh water and cleaning solution.
6) Re-connect the power cord and resume parts cleaning operations.
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