Waters 2414, Обзор и руководство по обслуживанию

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June 11, 2015, 715004754 Rev. A
Page 87
Figure 5–16: Set the pulse period or signal width using the switch
5.5.6 Setting display contrast
Use the Contrast function to adjust the contrast of the detector display screen. When
you press the Contrast key (Shift 6), the Display Contrast screen appears.
Figure 5–17: Display contrast screen
Use the
s
and
t
keys to adjust the contrast of the display.
5.5.7 Displaying system information
The System Info key (Shift 4) displays information about the detector, including the
serial number, the software version number, and the IEEE address, if applicable.
5.6 Optimizing performance
You can adjust the noise level, peak height, peak direction, and the temperatures of
the internal oven and column heaters to optimize the performance of the detector.
5.6.1 Attenuation and sensitivity guidelines
Attenuation/sensitivity affects the magnitude of the output signal to an integrator.
Increasing the attenuation/sensitivity setting increases the resultant peak areas, but
it also increases baseline noise and the response to environmental fluctuations. In
addition, an increase in attenuation/sensitivity reduces the dynamic range over which
the refractometer output is useful. The following figures show examples of the effects
of varying the attenuation/sensitivity setting on a chromatogram and of the effects of
varying the filter time setting on a chromatogram.
Single pulse
Rectangular wave
n
seconds
n
seconds