Geolux LX-80-15, Руководство пользователя

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LX-80-15 10 Hz User Manual
17 LX-80-15 10 Hz Oceanographic Radar Sensor
4 – 20 mA Parameters
4 – 20 mA min. - To configure the 4 – 20 mA output range, the minimum measured value which
will correspond to 4 mA analog output needs to be set. The value is set in the currently configured
measurement unit. Example: if values measured by the instrument are expected to be within the range
of 700 mm to 5000 mm, it is recommended to configure the minimum value to slightly below 700 mm
(for example 500 mm). Alternatively, if the resolution is not critical, then minimum value for 4 – 20 mA
output can be left to the instrument minimum of 0 mm.
4 – 20 mA max. – To configure the 4 – 20 mA output range, the maximum measured value which
will correspond to 20 mA analog output needs to be set. The value is set in the currently configured
measurement unit. Example: if values measured by the instrument are expected to be within the range
of 700 mm to 5000 mm, it is recommended to configure the maximum value to slightly above 5000 mm
(for example 6000 mm). Alternatively, if the resolution is not critical, then maximum value for 4 – 20 mA
output can be left to the instrument maximum.
Processing Parameters
Filter Type
Changing the type of filter which is used to smoothen the measured data.
No filter - No filtering is used and the raw measurements are reported.
IIR - Infinite-Impulse Response filter is used to smooth the data. When compared to moving average
filter, IIR filter reacts more quickly to initial change in the data, but it takes longer for the smoothed value
to reach the new measurement. The use of IIR filter is discouraged for general applications. The IIR
constant can be configured separately.
Moving average - The moving average filter calculates the average value of a number of raw
measurements. The length for the moving average filter is configured separately through the Filter length
parameter.
Median - The median filter finds the median value from a number of raw measurements. The length for
the median filter is configured separately through Filter length parameter.
Standard deviation - This type of filter is similar to the moving average filter. It takes a number of raw
measurements (as defined by Filter length parameter), then removes 20% of outliers, and calculates the
average of the remaining 80% of values.
Output value 4-20 mA
20 mA
4 mA
Min. Value Max. Value