Covaris
LE220 (-plus, R-plus, and Rsc) Setup & Instruction Manual
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Part Number: 010398 Rev H | November 2019
Figure 4.3 Add a Treatment
Add a Treatment: Treatment parameters are chosen by directly editing the Value box. The treatment parameters are:
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Peak Incident Power (PIP)
: This parameter measures the peak electrical power used to drive the ultrasound transducer. In your
system, the adjustable range of Peak Incident Power is 0.1 to 500 Watts.
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Duty Factor
: This parameter defines the ratio between the on-time of the transducer and total operation time and is expressed as a
percentage. For a given Peak Incident Power, a larger Duty Factor results in more acoustic energy generated from the transducer.
Users can define the Duty Factor from 0.1% to 50%.
The product of the Peak Power and Duty Factor gives the approximate Average Incident Power (AIP) generated from transducer.
For example, if Peak Incident Power is set to 10 Watts and Duty Factor is set to 15%, the Average Incident Power will be
approximately 1.5 Watts. However, the real average incident power from the transducer may vary due to factors such as sample
tube type, water level, and water temperature.
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Cycles per Burst
: This parameter indicates the number of electrical signals used in each acoustic “burst” of the transducer. On your
system, you may define Cycles per Burst (cycles/burst) from 50 to 1000 for different applications. Advanced users may use this
parameter to fine tune their experiments.
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Duration
: This parameter defines the amount of time for which the sample is under a treatment. The measurement of the Duration
is in seconds. The maximum time for any treatment is 3600 seconds. Should a longer treatment be necessary, “Duplicate Steps” can
be used to extend the treatment. SonoLab displays the Average Incident Power, calculated from the Peak Incident Power and
Duty Factor, adjacent to the treatment parameters in the treatment step bar. In the LE220- plus, the maximum Average Incident
Power is 250 Watts (500 watts Peak Incident Power and 50% Duty Factor).