Sonics VC600 Dual - Manual (Page 11)

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4. Set POWER SWITCH to ON. The switch will illuminate.
5. Momentarily depress TUNE SWITCH and rotate the tuner clockwise or
counterclockwise until a minimum (not maximum) reading (usually less than 20)
is obtained on the POWER MONITOR. If a minimum reading (sometimes
referred to as null) cannot be obtained, the probe, cup horn, tip, microtip, or
accessory is loose or out of resonance, or the power supply or converter require
servicing. A loose probe will usually generate a loud piercing sound.
6. Set OUTPUT CONTROL to “4”.
7. Set POWER SWITCH to OFF.
8. With a dual output 600 watt Ultrasonic Processor, if two converters are going to
be used simultaneously, connect the second converter cable to the top connector.
NOTE
If minimum reading cannot be obtained, check unit without the probe to ascertain whether the
power supply or probe is at fault.