BUCHI Ultrasonic Package - Manual (Page 31)

BÜCHI Labortechnik AG Operation | 6
Ultrasonic Controller 31/46
6 Operation
NOTICE
Risk of liquids leaking into the housing or electrical components.
Device damage by liquids and detergents and corrosion.
1. Do not spill liquids over the device.
2. Wipe off any liquids instantly.
3. Place the distilled water onto the designated reservoir­plate on top of the
B­290.
6.1 Stall point, determination
1. Switch on the ultrasonic controller.
2. Turn the adjusting knob counterclockwise until the display shows 0 Watt.
3. Turn the adjusting knob clockwise until the display shows 7 Watt.
4. Switch on the peristaltic pump.
• Use a rate consistent with the anticipated flow rate for the application.
5. Turn the power level down until the nozzle has stalled (atomization
ceases).
• Note the value (Watt) on the display when the atomization has ceased.
6. Switch off the peristaltic pump.
7. Increase the power until the atomizing surface has cleared itself of liquid.
8. Switch on the peristaltic pump.
9. Set the power 1 Watt above the previously noted stall point.
• If the stall point is less than 1.5 Watt, increase the power level to
0.5 Watt above the stall point value.
Note
Power settings are also related to flow rate. If you intend to use flow rates
higher than chosen in step 4, it may require that the power be increased beyond
the level determined in steps 5–9 above.