Chapter 4: Running Samples 119
Setting Up the Breakoff
Establishing a stable drop pattern in the breakoff window is an important step in
getting optimal results from the system. See Breakoff Window on page 62 for
more information on the parameters and controls in the breakoff window.
1 Adjust the Ampl slider until the drop breakoff is approximately in the top
third of the Breakoff window.
Do not exceed 70 volts. If you cannot achieve a drop breakoff at <70 volts,
do the following:
•Check the flow cell for air bubbles. If you see bubbles, turn the stream
off and back on.
• Make sure the sheath pressure and drop drive frequency are
appropriate. See Table 3-2 on page 102 for starting values.
•If the amplitude is <10 volts, turn on Attenuation in the Side Stream
window.
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