L&R Quantrex Q90, Owner'S/Operator'S Manual

Page: 23 / 28

23
Foil Test
An aluminum foil test is a method to evaluate the general
cleaning intensity and soundwave coverage throughout the
tank. Perform this test as follows:

Obtain any regular grade (not heavy duty) aluminum foil
sold in a supermarket (less than 0.001 in. thick). Cut a
piece large enough to cover ½ to ¾ of your tank bottom.

Fill the tank as usual with room temperature L&R
General Purpose Cleaner Concentrate (L&R 012) or
L&R Jewelry Cleaner Concentrate, diluted as specified.

Run the machine for 10 minutes without a basket and
with heat off, to de-gas the solution.

Lower the foil into the operating tank vertically and
centered to the bottom.

Continue to hold the foil and let the machine run for one
minute.

Turn the machine off and remove the foil.

Examine your piece of foil. There should be a peening
effect and/or some perforations on the foil. The location
and size of those peening or perforation patterns
indicate the cleaning intensity and uniformity of the
ultrasonic sound waves in the tank.