Xylem YSI ProDSS, Руководство пользователя

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27
Operation
Averaging
→
Averaging ( Figure 32 )
The averaging mode determines how the ProDSS will filter data. A
smaller time frame for the rolling average window allows changes in
the sensor’s measurements to be more quickly observed, while a larger
rolling window provides more stable measurement readings and a
smooth result. Each averaging mode will decrease the time span of the
rolling window if a large change in the sensor measurement is detected,
allowing the ProDSS to adapt when an event occurs.
The Default mode provides optimum averaging for all sensors. This
mode has up to 40 seconds of averaging on the sensors.
In Accelerated mode, changes in sensor measurements are more
quickly observed than default (5-10 seconds of averaging). This mode is
recommended when the sensors are moving through the water, such as
profiling studies and most spot sampling applications.
NOTE: For profiling applications, enable Vertical Position under
Depth Display to view unfiltered depth measurements. This
helps to ensure the depth sensor is lowered to the desired
depth without waiting for the averaged measurement.
In
Rapid
mode, sensor response is very fast (2-3 seconds of averaging),
but the instrument will never settle on a single steady number. This mode
is recommended when the sensors are moving quickly through the water,
such as rapid profiling and towed applications.
Salinity
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Salinity
Salinity is determined by calculations derived from the conductivity and
temperature sensors.
When a conductivity sensor is installed, the instrument will automatically
use the salinity measurement for DO and “As Measured” will be
displayed. If no conductivity sensor is installed (e.g. ProODO cable
assembly used), the salinity value will be user-selectable.
Because salinity is an important factor in determining dissolved oxygen,
YSI does not recommend calibrating or taking dissolved oxygen
measurements without conductivity and temperature sensors.
Figure 32 Averaging