Sonics VCX134 - Manual (Page 13)

NOTE
The probe is tuned to vibrate at a specific frequency. If the resonant frequency of
the probe has changed, due to cavitation erosion or fracturing, a minimum reading
will not be obtained. If an overload condition exits, or if minimum reading cannot
be obtained (less than 20%) with the probe out of the sample, check the
instrument without the probe to determine which component might be defective.
If minimum reading is obtained using the converter without the probe, the probe
is defective and should be replaced with a new one.
A loose probe will usually generate a loud piercing sound.
Refer to Section III if an overload condition exists.
Immerse the microtip half way into the sample. If the probe is immersed to an insufficient
depth, air will be injected into the sample, causing the sample to foam.
Since the amplitude required is application dependent and subject to the volume and
composition of the sample, it is recommended that the amplitude be selected empirically,
by increasing or decreasing the level of intensity as required as the sample is being
processed.
TIMER:
In the pulsed mode the processing time will be different from the
elapsed time because the processing time function monitors and controls only the
ON portion of the duty cycle. For example, for 1 hour processing time, the
elapsed time will be 2 hours if the ON and OFF cycle are set for 1 second. To set
the processing time, press the
TIMER key.
The screen will display:
Time Setting
Hrs: - Min: -- Sec: --
Using the numeric keys, set the processing time as required:
Time Setting
Hrs: 0 Min: 30 Sec: 00
e.g.
Press the ENTER/REVIEW key. The screen will display:
Time 0:30:00
Pulse
-- -- Ampl 40 %
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