Hach AS950 Fonctionnement page 8

Option
Application Settings
(US900x)
Advanced Settings
Restore Defaults
Option Description
Basic Settings
AC Frequency Selects the power line frequency to get the best noise rejection. Options: 50 or
60 Hz (default).
Always On Sets the sensor to operate continuously or to only operate during the data logging
interval for the sensor. Options: Enabled (default) or Disabled. Select Disable to
increase the battery life.
Table 5 Configuration options—US900X ultrasonic sensor
Option Description
Basic Settings
Sensor Type Selects the sensor type. Options: Downlooking or In-Pipe.
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.
(optional) Options: –0.61 to 0.61 m (–24.00 to 24.00 in.). Use Level Offset to correct an
offset error without having to do a calibration.
Adjust Level Completes a distance measurement to use for level adjust.
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).
8 English
Description
Configures the sensor settings that are used to control the sensor
operation.
Configures the optional, advanced sensor settings.
Sets the sensor settings and the sensor calibration back to the
factory defaults.
Table 4 Configuration options—pH sensor