Omni Q55 Ultrasonic User Manual Download Page 17

The probe should be submerged approximately halfway into the liquid but there are 
exceptions.  Before processing actual samples, it is recommended to test the probe in 
a vessel filled with water to observe the ultrasonic energy and the flow pattern of the 
liquid.  During this test you can adjust the probe’s depth until you see adequate mixing 
and movement of the water. 
 

Power vs. intensity

 

Power is the measure of the electrical energy that is being delivered to the 
converter. It is measured in watts and displayed on the sonicators screen.  At the 
converter, the electrical energy is transformed into mechanical energy. It does this by 
exciting the piezoelectric crystals causing them to move in the longitudinal direction 
within the convertor. This change from electrical into mechanical energy causes a 
motion that travels through the horn/probe causing the tip to move up and down. 

The distance of one movement up and down is called its amplitude. The amplitude is 
adjustable. Each probe has a maximum amplitude value.  For example, with a 1/8” 
diameter probe at setting 100%, the probe will achieve an amplitude of approximately 
180μm. At setting 50% the amplitude is approximately 90μm.  Note: this is approximate 
and not perfectly linear.  We measure the amplitude of each probe at 100% and these 
values are published in the brochure. 

Amplitude and intensity have a direct relationship. If you operate at a low amplitude 
setting, you will deliver low intensity sonication. If you operate at a high amplitude set-
ting, you will have high intensity sonication. In order to be able to reproduce results, the 
amplitude setting, temperature, viscosity and volume of the sample are all parameters 
that need to remain consistent. The amplitude, not the power, is most critical when 
trying to reproduce sonication results. 

Power has a variable relationship with amplitude/intensity. For example, sonicating 
water requires less wattage when compared to a viscous sample (such as oil). While 
sonicating both samples at the same amplitude setting the power/wattage will differ 
because the viscous sample will require more watts in order to drive the horn. The 
viscous sample puts a heavier load on the probe so they system must work harder to 
vibrate up and down at the same amplitude setting.  The oil may draw double the watts 
when operated at the same amplitude as the water sample. 

Small fluctuation in the wattage during sonication is normal.  Major swings in wattage 
(+/- 20 watts) may indicate a problem with the sample, setup or the sonicator itself. 

Viscosity Limitations 

   

Viscous solutions and highly concentrated liquids can be difficult to sonicate.  If the 
liquid is so thick that it cannot be easily poured out of a vessel it is likely too viscous to 
be sonicated.

Keeping Samples Cool

 

Ultrasonic processing causes the liquid temperature to elevate especially with small vol-
umes. Pulsed sonication is always recommended.  The addition of an ice bath or recircu-
lating chiller to cool the sample vessel is strongly suggested.

Summary of Contents for Q55 Ultrasonic

Page 1: ...Q55 Ultrasonic Homogenizer User Manual...

Page 2: ...ty of either merchantability or fitness for a particular pur pose No person or company is authorized to change modify or amend the terms of this warranty in any manner or fashion whatsoever Under no c...

Page 3: ...R immerse the converter in liquids of any kind or let condensed moisture or liquid drip into the converter NEVER grasp an activated horn or touch the tip of a vibrating probe It can cause severe burns...

Page 4: ...ensions W 8 20 0 cm D 7 5 19 0 cm H 5 75 14 6 cm Output Voltage 250 VRMS Output Frequency 20 KHz AC Adapter Input Voltage 90 to 264 VAC 50 60 Hz 1 5A Output Voltage 24V DC 3 75A Rated Power 90 Watts C...

Page 5: ...er cord or adapter Trans formers are not recommended Environmental Pollution Degree 2 Installation Category II Operating Limits Shipping Storage Temperature 41 104 F 5 40 C Relative Humidity 10 95 Non...

Page 6: ...iquid the rapid vibration of the tip causes cavitation the formation and violent col lapse of microscopic bubbles The collapse of thousands of cavitation bubbles releases tremendous energy in the cavi...

Page 7: ...RIPTIONS OF COMPONENTS FUNCTIONS OF CONTROLS 5 1 Q55 FRONT PANEL 5 2 Q55 REAR PANEL Power Supply Convertor Cable Convertor Probe Lab Stand with Clamp Convertor Cable Connector Footswitch Jack DC Power...

Page 8: ...itch Continuous Position Probe tip is energized when the amplitude is set above the red area on the Amplitude Control Knob Thumb switch Position Probe tip is energized once the thumb switch or footswi...

Page 9: ...4 CONVERTER CLAMPING Improper clamping can damage the system and void the warranty Using a sound en closure part 060 12 or stand part 060 10 will ensure a proper fit Proper Clamping Improper Clamping...

Page 10: ...ersal 98 264 V 47 63Hz AC to DC switch mode power supply capable of delivering 24 volts at 3 75 amperes is supplied with your system If it is necessary to convert the unit for different voltage operat...

Page 11: ...electrical outlet 3 If the optional foot switch is used insert the plug into the jack located on the rear panel Do not insert footswitch plug while the system is powered on 4 Probes must be properly t...

Page 12: ...mode 1 Ensure that the amplitude control knob is set to 0 2 Set the switch on the front panel to thumb switch 3 If needed connect the foot switch cable to the designated jack on the back of the power...

Page 13: ...NTENANCE Ultrasonic homogenizers create high intensity vibration which puts stress on the con verter and horn assembly The sides and end of the probe must never be allowed to come in contact with anyt...

Page 14: ...debris on the threading of the connecting stud Allow the alcohol to dry completely 3 Clean threading in converter Use alcohol and a cotton swab to remove any debris on the threading Do not allow liqu...

Page 15: ...turn the power on for a few seconds to remove residue The tip also can be sterilized using alco hol with the power on 9 TROUBLESHOOTING The most probable causes for malfunction are listed below and sh...

Page 16: ...volumes are application specific Tip Diameter Processing Volume Range 5 64 1 6 mm 200 L to 5 mL 1 8 3 2 mm 500 L to 15 mL 1 4 6 4 mm 10 mL to 50 mL Vessel shape and size A narrow vessel is preferable...

Page 17: ...low amplitude setting you will deliver low intensity sonication If you operate at a high amplitude set ting you will have high intensity sonication In order to be able to reproduce results the amplit...

Page 18: ...935 Cobb Place Blvd Kennesaw GA 30144 800 776 4431 770 421 0058 www omni inc com PN 03 2021 55 Rev A...

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