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OPERATION
6
97
OPTIFLEX 1300 C
www.krohne.com
01/2008 • 4000172301 - HB OPTIFLEX 1300 R02 en
Interface threshold
When there is more than one liquid in the tank, the instrument uses a second threshold to
measure interface.
The interface threshold identifies:
•
The level signal (the first signal that goes across the level threshold).
•
The interface signal (the next largest signal)
This instrument uses this data to monitor the interface signal. When you change the interface
threshold, refer to How to use thresholds
How to use thresholds
How to use thresholds
How to use thresholds in this section.
For more data about the interface threshold, refer to
C. Advanced setup
on page 77 (menu item
C.1.17).
Probe End threshold
Use this threshold when the instrument operates in tank bottom following mode. The
instrument uses TBF mode to measure the level of products with low dielectic constants. It uses
the probe end as a reference. If the reflection is very weak, change the probe end threshold to
ignore parasites. Refer to the procedure in How to use thresholds
How to use thresholds
How to use thresholds
How to use thresholds to change the probe end
threshold.
For more data about the probe end threshold, refer to
C. Advanced setup
on page 77 (menu item
C.1.18) .
6.4.10 How to use the snapshot function to filter parasite signals that do not move
The thresholds cannot find the level of the tank contents if it is below a large parasite. This
shows the signals as you can see them on an oscilloscope:
NOTE!
If the instrument is set at the factory to measure interface, you can change the interface
threshold.
NOTE!
If the instrument is set at the factory to measure in tank bottom following (TBF) mode or
automatic mode, you can change the probe end threshold.
HB_OPTIFLEX1300_EN_D4_080428.book Page 97 Tuesday, April 29, 2008 2:47 PM