Instrument Type:
Detector
Default:
ON
Related Commands:
Description:
The Average parameter allows you to average signals. Signal averaging is possible for both, digital signals sent to the server PC from the detector, such as the Dionex UVD 170U and UVD 340U detectors, and analog signals.
The Dionex UCI (or A/D converter) records each analog signal with a frequency of 100 Hz. This corresponds to a Step of 0.01 seconds or a Sampling Rate of 100 data points per second. When you increase the step or decrease the sampling rate, fewer data points are stored than theoretically possible.
Function:
When activating the Average signal parameter, the data points between the stored values are considered as well. Chromeleon averages all measured values that are within a step interval. The calculated average is stored in the Raw Data file. This generally improves the Signal-to-Noise Ratio. (Select the Average parameter to smooth chromatograms with an increased noise level.) This parameter does not influence the precision of integration.
Tip:
Averaging is always performed in a 3D field.
For almost all detectors, concentration is proportional to peak-area; that is, it is integral of the signal over time. That is why local (time) signal averaging does not influence quantitative determination.