Threshold auto on, 5 sensor setup menu (continued), Operation – Hach-Lange SONATAX sc User Manual
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Operation
REFLEXLIST
Shows the reflex list. A new measurement can be triggered.
A list is shown of all detected solid bodies that have clearly reflected the ultrasonic
impulse. The measurement depth is shown in m or ft and the strength of the
reflected signal in %, relative to the strongest signal in the list. This list mostly
contains the tank floor. If strong reflections between the water surface and the tank
floor are present (for example due to pipes, plates etc.), it should be checked
whether another installation location offers better conditions.
TANK DEPTH
Entry of the floor depth (refer to
3.4.1.2 Determine measurement location on
Configurable: 1.00 m to 12 m (3.3 ft to 39.4 ft)
PROFILE LIST
A profile is calculated from the ultrasound echo and shown for the corresponding
depths respectively as profile strength. The profile is similar in its curve with the TS
profile of the tank. At an average solid content, the values are in the order of 1. A
new measurement can be triggered (refer to
ADV. SETTINGS
FACTOR
Correction factor for the speed of sound.
Configurable: 0.3 to 3.0, default setting 1.0
A change of the default factor is only required if the local speed of sound in the fluid
deviates from the speed of sound in water:
Factor (fluid) = speed of sound (fluid) / speed of sound (water)
Note: For applications in water, the factor should remain at 1.0.
THRESHOLD AUTO
With the automatic threshold function, the system constantly adapts the
environmental conditions and automatically changes the sensitivity in order to
guarantee maximum accuracy.
Recommendation: 75%
Configurable: 1-95%
LL THRESH. AUTO
LL THRESH. AUTO gives the smallest possible value that the threshold can accept.
Configurable: 0.1 to 1.0, recommendation 0.3
FADE-OUT
If fixed installations or other influences interfere at certain tank depths, then this
range can be faded out —·it is then completely ignored.
Configurable: ON, OFF
BEGIN
Upper limit of the range that should be faded out.
Only active when FADE-OUT = ON.
END
Lower limit of the range that should be faded out.
Only active when FADE-OUT = ON.
SET DEFAULTS
Reset to factory configuration for all probe-specific parameters. This occurs only
after a security prompt.
4.5 SENSOR SETUP menu (Continued)
Select the SONATAX sc (if several sensors are connected)