Omni Tip™ Plastic Probes; Omni Th Operation - Omni PCR-258 User Manual

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SECTION 3 — OMNI TH OPERATION

3.3 OMNI TIP™ PLASTIC PROBES

An Omni Tip™ Adapter (12-120) is required to use Omni Tip™ Plastic

Probes with the Omni TH. Omni TH Tissue Homogenizers with a black

nose ring will require Omni Tip adapter (A1000SB) to use Omni Tips.

First, insert the smaller end of the Omni Tip Adapter into the Omni TH

as far as possible, turn clockwise, and release. Next, insert an Omni Tip

Plastic Probe into the Omni Tip Adapter as far as possible, turn clock-

wise, and release. The TH is now ready to operate. Omni Tips can be

disposed of after use.

Connect the Omni TH to an appropriate power outlet. Speed of the

Omni TH varies between 5,000 and 35,000 rpm and is set by means of

the blue slider switch. The power switch located above the blue slider

switch turns the motor on and off.

Insert the generator probe into the Omni TH motor (see above). The

depth of the generator probe in the sample vessel can significantly

affect flow patterns within the vessel. This also affects processing

efficiency. As a rule of thumb, the generator probe usually operates

most efficiently at a depth of 1/3 (to 1/2) of the liquid height. Heavy

sediments may require deeper immersion, and this processing depth

can be optimized by observing flow patterns and related processing

results. While processing, liquid can circulate through the two holes

at the bottom of the generator probe. When using a stainless steel

probe, the top hole should not be immersed in the sample. Blocking

the upper hole could result in liquid being drawn into the lower motor

bearing.

Operating at the top speed of 35,000rpm enhances the processing

efficiency of the rotor-stator generator probe. For most samples, three

to four short bursts at top speed should be sufficient for complete

homogenization of the sample.

NOTE:

For optimal sample recovery during processing, reduce the

motor speed and completely remove the generator probe from the

sample. Then turn off the motor drive unit.

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