KROHNE BM 102 Handbook - Manual (Page 55)

BM 102 55
Procedure (example where the level measured is too low compared to true level)
• read off displayed peak amplitude using the oscilloscope function – F7
• modify level threshold value
Step
Action Data entered/ value
displayed
1 Execute PCSTAR 2. Press F2 to connect to gauge. n/a
2 Press F11 to open F11-Dynamic configuration
window. n/a
3 The top of the window gives the distance, peak
amplitude in volts and gain. 21000 mm
650 mV
Gain 3
4 The configured level threshold is listed under peak
amplitude in mV. Click on the “Modify” box to activate
the “Threshold” field. n/a
5 Click on the ”Threshold” field and enter the new
value. 500 mV
6 If the approximate level is known, click on the
“Distance” field and then click on the “Search” button -
7 If the value is still too low, try reducing threshold
again by small amounts. If this does not resolve the
problem, contact the KROHNE Service Centre. . A list
of service centres for each country is supplied on the
back page of this handbook. n/a
Note that the threshold drops every 2 metres or 6.5 feet.
Solid application notes
Most dry solid applications except powder or flakes with high dielectric constants, such as coal
powder, are measured with a Gain of 3. If it is difficult to measure level at a certain point with the
gauge using a Gain from 0 to 2, then an internal tank structure (exposed girder, etc.) is most likely
to be within the electromagnetic pulse field area: the gauge will detect the largest signal and
assume this is the product level.