Setup And Operation - Branson Digital Sonifier 250 User Manual

Operation

6.1 Setup and Operation

WARNING
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Do NOT touch the vibrating horn, or place the vibrating horn against solid objects such as
beakers and crucibles. Touching or holding the horn can result in burns or injury, and contact-
ing solid materials with the vibrating horn or tip can cause breakage.
CAUTION
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DO NOT run the microtip above an Amplitude setting of 70%. Doing so can cause damage
to the microtip assembly.
System Modes
Y o u c a n c o n t r o l t h e w a y i n w h i c h u l t r a s o n i c s a r e a p p l i e d t o y o u r s a m p l e b y s e t t i n g t h e u n i t t o o p e r a t e i n o n e o f
s e v e r a l d i f f e r e n t m o d e s . Y o u d e t e r m i n e t h e m o d e i n w h i c h t o o p e r a t e b y s p e c i f y i n g p a r a m e t e r s f o r y o u r e x p e r -
i m e n t . T h e r e a r e f i v e s y s t e m m o d e s , a s d e s c r i b e d b e l o w :
• Continuous Mode: Ultrasonics are applied to the sample until you Stop or Pause the experiment.
• Timed Mode: Ultrasonics are applied to the sample for a period of time that you specify by setting the
Time parameter.
• Pulse Mode: Ultrasonics are turned on and off repeatedly during the experiment. You specify the length
of the intervals in which ultrasonics are on and off. For example, you can specify 0.5 seconds for the
Pulse On parameter and 2.1 seconds for the Pulse Off parameter. You can also specify a time limit using
the Time parameter, and/or a temperature limit using the Temperature parameter.
• Temperature Mode: Ultrasonics are applied until the sample reaches a temperature that you specify by
setting the Temperature parameter. The Temperature Mode requires the optional Temperature Probe,
and operates as follows:
• when no TIME or PULSE TEMP parameter is entered, the experiment stops when the MAX
TEMP value has been reached.
• When a TIME and MAX TEMP value have been entered, the experiment runs until the TIME has
elapsed. If the MAX TEMP is reached before the TIME parameter has elapsed, ultrasonic vibra-
tions will temporarily stop (and the timer will stop counting) until the Probe Temperature has
dropped by 3 degrees below the MAX TEMP setting, at which point the timer and the ultrasonic
vibrations resume. The front panel display shows the proper ultrasonics active displays.
• Pulse/Pause Mode: Used for holding an experiment within a desired temperature range. Ultrasonics are
applied to the sample while keeping the sample's temperature between the Pulse Temperature value
and the Maximum Temperature values that you specify. This allows you to limit temperature buildup in
the sample while continuing ultrasonic treatment until you obtain the process results that you want.
6-2 100-214-239 Rev. A