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May 2016
Reference Manual
00809-0100-4530, Rev DD
309
Automatic threshold settings are enabled by default. In the
Advanced Configuration
window
the
Interface
,
Reference
,
Probe End
and
Full Tank
thresholds can also be set manually.
Automatic surface threshold
When this check-box is selected, the transmitter automatically sets the Surface threshold to
a constant value based on the configured Dielectric Constant of the product.
Note that by enabling the Automatic Surface threshold setting, the
Amplitude Threshold
Curve
(ATC) is replaced by a constant threshold value. See
“Using the echo curve analyzer”
for more information on how to use the ATC.
The Surface threshold can also be manually set by using the
Set Threshold
function in the
Echo Curve Analyzer/Configuration
Mode window (see
“The configuration mode tab” on
).
Interface threshold
Amplitude threshold for detection of the Interface level peak.
Reference threshold
Amplitude threshold for detection of the Reference pulse.
Probe end threshold
If the Probe End Projection function is used (see
“Probe End Projection” on page 310
), this
threshold may need to be adjusted to make sure the probe end pulse is properly detected.
Full tank threshold offset
Note
By default, the Full Tank Threshold Offset value is 0 (function is not used). Do not use this
function unless you are qualified.
The Full Tank threshold is related to the Reference Threshold, and can be used for detecting
that the tank is full. The given offset value determines the gap between the Reference
threshold and the Full Tank threshold. The transmitter considers the tank full when the
amplitude of the Reference Peak has dropped to a value between the two threshold values.
If the amplitude of the Reference peak is below the Full Tank Threshold (negative amplitude
of the Reference peak), the tank is not considered full.
By default, this value is 0 (function is not used). This is because highly contaminated or
condensed tank-seals, and turbulent or boiling surfaces, which can cause splashing, may
cause function to be triggered.
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