KROHNE OPTIFLEX 8200 C Handbook page 110

OPERATION
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• 2.5.9 Probe End Threshold 2.5.9 Probe End Threshold 2.5.9 Probe End Threshold to set the threshold for the reflection on the end of the probe. If 2.5.9 Probe End Threshold
you must calculate the ε
must be a good probe end signal.
The user can do a check of the signal amplitude after reflection on the surface of the
liquid product or the liquid interface:
2.5.4 Level Threshold. Level threshold is the value that permits the device to find and measure
the level of the tank contents. The level threshold must be set lower than the amplitude of the
level signal. It is measured in thousandths (1...1000) of the reference pulse amplitude (value=
1000). The device measures the distance from the process connection to the level signal, and the
signal amplitude. The signal converter then does a mathematical conversion (that agrees with a
law of signal attenuation) to show the signal amplitude at a standard distance of 1 m / 3.3 ft from
the process connection. This value helps you to set the level threshold in this menu item.
2.5.5 Interface Threshold. Interface threshold is the value that permits the device to find and
measure the interface between two liquid products in the tank. The interface threshold must be
set lower than the amplitude of the interface signal. It is measured in thousandths (1...1000) of
the reference pulse amplitude (value= 1000). The device measures the distance from the process
connection to the interface signal, and the signal amplitude. The signal converter then does a
mathematical conversion (that agrees with a law of signal attenuation) to show the signal
amplitude at a standard distance of 1 m / 3.3 ft from the process connection. This value helps
you to set the interface threshold in this menu item.
2.5.6 Probe End Threshold. Probe end threshold is the value that permits the device to find the
end of the probe. The probe end threshold must be set lower than the amplitude of the probe end
signal. This value is measured in thousandths (1...1000) of the reference pulse amplitude (value=
1000). The device measures the distance from the process connection to the probe end signal,
and the signal amplitude. The signal converter then does a mathematical conversion (that
agrees with a law of signal attenuation) to show the signal amplitude at a standard distance of
1 m / 3.3 ft from the process connection. This value helps you to set the probe end threshold in
this menu item.
INFORMATION!
For more data on menu items, refer to Function description on page 79
How to use thresholds
Although the data that follows refers to the level threshold, it is applicable for the interface
threshold and the probe end threshold.
If there is an interference signal above the level and the threshold is too low, the device can
incorrectly use it as the level signal.
110
of the product or operate the device in AUTOMATIC mode, there
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OPTIFLEX 8200 C/F/S
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06/2018 - 4006448901 - MA OPTIFLEX 8200 R01 en