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Table 5 Configuration options—US900X ultrasonic sensor (continued)
Option Description
Flow Settings
Device Selects the primary device. Enters the device specifications.
For additional information, refer to the expanded user manual on the manufacturer's
website.
Application Settings
Filter Size Selects the number of readings the sampler does and averages for one data point. Options:
1 to 50 (default: 16).
Reject High Selects the number of the highest values that are discarded. Options: 0 to 49 (default: 4).
For example, if the filter size is 16 and the reject high and reject low values are 4, the
sensor collects 16 measurements and discards the highest 4 and the lowest
4 measurements. The other 8 values are used to calculate the average data point of level.
Reject Low Select the number of the lowest values that are discarded. Options: 1 to 49 (default: 4).
Number of Holds Selects the number of times the last recorded data point is saved to the log if a failed
reading occurs due to echo loss. Options: 0 to 15 (default: 4).
For example, if the number of holds is 5, the last data point replaces the next five
consecutive failed readings or until a successful reading occurs.
Median Filter Selects the number of data points used in the median filter. The sampler takes median of 3,
5, 7, 9 or 11 data points to decrease noise or outliers (default: None). Only the median
values are logged. Raw data values are not logged.
Advanced Settings
Sample Rate Selects the number of measurements done per second. Options: 1 to 10 (default:
4 seconds).
Min Dist Selects the minimum distance from the sensor to the water. Options: 0.13 to 3.96 m
(5.25 to 150.75 in.). Distances less than the minimum distance of the sensor are ignored.
Max Dist Selects the maximum distance from the sensor to the water. Options: 0.13 to 3.96 m
(10.50 to 156.00 in.). Distances more than the maximum distance of the sensor are
ignored.
Profile Do not change this setting without guidance from technical support. This setting is used to
increase the performance of the sampler when the sampler is used in very difficult
conditions. Options: Free Air Low, Free Air Mid (default), Free Air High, Stilling Tube Low,
Stilling Tube Mid or Stilling Tube High.
Transmit Power Do not change this setting without guidance from technical support. This setting is used to
increase the performance of the sampler when the sampler is used in very difficult
conditions. Options: 2 to 30 (default: 10).
Option Description
Basic Settings
Sensor Direction Selects the installation direction of the sensor. Select Reversed if the sensor is installed in the
reverse direction. Options: Normal (default) or Reversed.
Sensor Offset Sets the offset used to adjust the measured level value to the correct value.
Sediment Enters the level of sediment in the bottom of the channel. Options: 0.00 to 0.30 m (0.00 to
12.00 in.).
Level Offset Enters the difference between the measured level and the actual level. Options: –0.61 to
(optional) 0.61 m (–24.00 to 24.00 in.). Use to correct an offset error without having to do a calibration.
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Table 6 Configuration options—AV9000S sensor