Operation Manual __________________________________Description of Major Components
______________________________________________________________________________________________
4-1
4. DESCRIPTION OF MAJOR COMPONENTS
GENERATOR (POWER SUPPLY)
Includes all operating controls and indicators, detachable three-wire grounded line cord,
fuse, external power control jack and high frequency cable connector.
PROCESS CONTROL FEATURES OF MODEL XL2020
•Microprocessor Controller - allows precise control of output power, elapsed processing
time, and cyclical rates of power pulsing. It encompasses the functions of the Digital
Integrating Timer and the Multi-Range PULSAR™ Cycle Timer.
•Digital Integrating Timer - permits precise timing of ultrasonic energy applied in one
second increments from one second to ten hours. The total desired processing time is set
on a pressure-sensitive keypad. Both the processing time selected and actual total elapsed
processing time is indicated by an LCD readout. A start/stop control initiates or reinitiates
timed sonication. A pause control allows manual pulsing or delay. The total preset time of
active sonication is unaffected by pauses or pulsing, whether by hand or with the Multi-
Range PULSAR™ Cycle Timer.
•Multi-Range PULSAR™ Cycle Timer - permits the application of ultrasonic energy to the
sample on a pulsed basis. Pulse on and off times are adjustable in 0.1 second increments
from 0.1 seconds to 1 hour each. This intermittent operation permits high intensity
sonication while avoiding heat build-up in the processed sample. It also allows particulate
material being processed to settle back under the tip.
•OVERLOAD INDICATOR - under certain extraordinary conditions, the amount of power
supplied to the convertor/horn assembly might endanger the circuitry of the generator to the
point of failure. In order to prevent unnecessary downtime, an overload protection feature
has been built into the generator. When the output power exceeds design specifications,
the overload light will illuminate and the output will be disabled. The following prompt will
appear: "OVERLOAD REFER TO MANUAL". (See 10-1 for instructions)
PROCESS CONTROL FEATURES OF MODEL XL2015
•PULSAR™ Cycle Timer - permits the application of ultrasonic energy to the sample on a
pulsed basis. Energy is automatically set for one pulse per second. Pulse width adjusts
smoothly from 0.05 of a second (5% duty) to 0.95 of a second (95% duty) every second.
This intermittent operation permits high intensity sonication while avoiding heat build-up in
the processed solution. It also allows material being processed to settle back under the tip.
•OVERLOAD INDICATOR - under certain extraordinary conditions, the amount of power
supplied to the convertor/horn assembly might endanger the circuitry of the generator to the
point of failure. In order to prevent unnecessary downtime, an overload protection feature
has been built into the generator. When the output power exceeds design specifications,
the overload light will illuminate and the output will be disabled. (If this should occur, follow
instructions in 10-1)
