Sonics VCX600 - Manual (Page 11)

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4. Press the TUNE key, and rotate the TUNER clockwise or counterclockwise until a
minimum (not maximum) reading – usually less than 35 – is displayed on the
POWER MONITOR bar graft. If a reading, of less than “35” cannot be obtained, the
probe, cup horn, tip, microtip, extender or accessory is loose or out of resonance, or
the power supply or converter require servicing. Note: Depressing the
TUNE key
energizes the ultrasonics for only 10 seconds.
5. With a microtip, rotate the AMPLITUDE control for a 40% reading on the LCD
screen – Ampl 40%. With any other probe, rotate the AMPLITUDE control for a
100% reading on the LCD screen – Ampl 100%.
6. Repeat step 4.
7. Since the amplitude required is application dependent and subject to he volume and
composition of the sample, it is recommended that the amplitude be first set at mid-
range, then empirically determined and optimized while the sample is being
processed.
To tune the instrument while processing, proceed as follows:
1. Press the
HOLD key to suspend processing. The red indicator will illuminate,
signaling that the processing cycle has been interrupted.
2. Withdraw the probe from the sample.
3. With a microtip rotate the AMPLITUDE control until the display reads 40% ( 100%
for any other probe).
4. Press the TUNE key (the ultrasonics will be energized for only 10 seconds), and
rotate the TUNER clockwise or counterclockwise until a minimum (not Maximum)
reading – usually less than 35 is displayed on the POWER MONITOR bargraph.
5. Reset the AMPLITUDE control as required.
6. Place the probe back into the sample.
7. Press the
HOLD key to resume processing.
NOTE
1. The probe is tuned to vibrate at a specific frequency – 20 kHz
?
50Hz. If the resonant
frequency of the probe has changed, due to cavitation erosion or fracturing, a minimum reading
will not be obtained. If minimum reading cannot be obtained, check the instrument without the
probe to determine which component might be defective. If proper tuning is obtained using the
converter without the probe, the probe is defective and should be changed.
2. A loose probe will usually generate a loud piercing sound.
3. Since the amplitude required is application dependent, and subject to the volume and
composition of the sample, it is recommended tat the amplitude be first set at mid -range, then
empirically determined and optimized while the sample is being processed.