Sonics VC40 40-watt (1988) - Manual (Page 9)

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1. Ensure that the power supply is properly tuned.
2. Immerse the probe ½” (1 cm) into the liquid.
3. Set POWER SUPPLY to ON, if footswitch is used, depress footswitch. To use the
TIMER, select the time sequence desired, set TIMER ON/OFF switch to ON, and
depress TIMER START BUTTON. To energize the PULSER, select the pulse
duration desired.
4. Using OUTPUT CONTROL increase or decrease intensity as required.
CAUTION
D o not operate the power supply unless it is connected to the converter.
N ever allow a microtip to vibrate in air for more than 10 seconds.
D o not allow the vibrating probe to come in contact with anything but the sample.
IMPORTANT
Proper care of the probe is essential for dependable operation. The intense cavitation will,
after a prolonged period of time, cause the tip to erode, and the power output to decrease
without showing up on the wattmeter. The smoother and shinie r the tip, the more power will
be transmitted into the sample. Any erosion of the probe tip will increase the rate of future
erosion. For that reason it is recommended that after every 5 or 6 hours of use the tip be
examined, and if necessary, polished with emery cloth or an abrasive wheel. Since the probe
is tuned to vibrate at a specific frequency, it is most important that only the contaminated
surface be removed. This procedure can be repeated as long as the wattmeter reads less than
20 watts with the p robe out of the sample, when the AMPLITUDE control is set at 100. If
the wattmeter reads over 20 watts the probe or replaceable tip should be changed.