KROHNE OPTIFLEX 8200 C Handbook page 111

OPTIFLEX 8200 C/F/S
Figure 6-9: How to use thresholds (level signal and threshold data shown in this example)
1 Signal amplitude
2 Threshold
3 Push [ ] to change the threshold value. Push [> > > > ] to change the position of the cursor and then push [ ] and [ ] to
change the value of each digit. Push [^ ^ ^ ^ ] to set the value and go back to the first screen.
4 Push [^ ^ ^ ^ ] to go back to the sub-menu level.
5 The signal amplitude and the threshold are correct. The device can find the level signal.
6 The signal amplitude and the threshold are incorrect. The device cannot find the level signal.
Figure 6-10: Signal intensity/distance graph: thresholds
1 Signal intensity given as a fraction of the reference pulse (measured in thousandths)
2 Distance from the process connection
3 Interference signal. A signal from a level switch that is in the limits of the electromagnetic field around the probe.
4 Level signal of the liquid products
5 The level threshold is correct. The device ignores the interference signal and measures level correctly.
6 The level threshold is too low. The device can use the interference signal as the level signal. Do the Auto Setup proce-
dure to make sure that the device ignores the interference signal.
We recommend that you do the procedure in menu item 1.4.0 Application Setup to find the level
signal:
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