Buchi 11069891, Руководство по эксплуатации

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6 | Operation BÜCHI Labortechnik AG
26/34 Operation Manual Ultrasonic Package
u Tap the button main switch aspirator.
ð
Drying gas is flowing in the drying circuit.
u Wait until the oxygen level has reached < 6%.
u Wait until the signal lamp OXYGEN HIGH switch off.
u Wait until the signal lamp PRESSURE LOW switch off.
u Select the inlet temperature.
u Tap the button main switch heater.
ð
The drying gas heats up.
u Wait until the system is in steady conditions.
6.4.3 Starting a spray drying process in closed mode
Precondition:
R
The instrument is prepared. See Chapter 6.4.2 "Preparing the instrument for
closed mode", page 25
u Immerse the tube in the pure solvent.
u Set the peristaltic pump between 3 - 30 %.
u Tap the button main switch peristaltic pump.
ð
Pure solvent flows to the ultrasonic nozzle.
u Wait until the solvent reach the atomizing surface of the ultrasonic nozzle.
u Switch the On/Off master switch of the ultrasonic controller to On.
u Select the output leveling mode. See Chapter 6.1.3 "Selecting the operation
mode", page 22
ð
The ultrasonic nozzle vibrates at the set power level.
u Adjust the spray cone. See Chapter 6.2 "Finding the optimal spray cone", page 23
6.4.4 Tasks during spray drying
Precondition:
R
The instrument is in operating conditions. See Chapter 6.3.3 "Starting a spray dry-
ing process in open mode", page 24
u Change the feed tube from the pure solvent to the sample.
ð
The sample flows though the feed tube to the nozzle.
u Turn the navigation control a small distance clockwise.
ð
Spray cone is established.
6.4.5 Ending a spray drying process in closed mode
Precondition:
R
The sample beaker is empty.
u
Change the feed tube from the sample to the pure solvent.
u
Decrease the pump rate.
u
Wait 2 -3 minutes.
ð
The solvent flushes the remainings from the ultrasonic nozzle.
u
Tap the button main switch peristaltic pump.
u
Switch the On/Off master switch of the ultrasonic controller to Off.
u
Tap the button main switch heater.
u
Wait until the glassware cooled down.
u
Tap the button main switch aspirator.
u
Set the air flow on the rotameter to 0.
u
Remove the product from the product collection vessel.