How To Make A Filter To Remove Radar Signal Interference - Ametek DR6500 Handbook

OPERATION
6

6.4.8 How to make a filter to remove radar signal interference

If the device measures level in a silo that contains obstructions (ladder, supports etc.), these
objects can cause radar signal interference (parasitic signals). You can use the empty spectrum
function (menu A4.2) in the Quick Setup menu to make a filter to remove radar signal
interference.
INFORMATION!
We recommend that you do an empty spectrum scan when the silo is empty and all the moving
parts are in operation.
Figure 6-10: How to make a filter to remove radar signal interference
1 Empty silo before the device uses the empty spectrum scan (with a graph of reflections shown)
2 Partially filled silo before the device uses the empty spectrum scan (with a graph of reflections shown)
3 Partially filled silo after the device uses the empty spectrum scan (with a graph of reflections shown)
4 Support beam locationLadder
5 Silo bottom signal
6 Support beam signals (interference signals) before the device does the empty spectrum scan
7 Signal of the solid before the device does the empty spectrum scan
8 Reflected signal if the device uses the data from the empty spectrum scan. The device only uses the reflection on the
surface of the solid to measure distance.
• After you enter Program mode, set the access level to "Expert". For more data about the
procedure, refer to
• Push [ ], [> > > > ], [ ] and [> > > > ] to go to the menu item A4.2 Empty Spectrum.
• Push [> > > > ] to start the empty spectrum recording procedure. For more data, refer to
spectrum recording
to the next step.
CAUTION!
If the "partial distance" value is more than the distance to the product surface, then the device
will put the level signal through the filter and the device will not measure the level of the product
correctly.
INFORMATION!
For more data on empty spectrum scans, refer to Function description on page 71
Quick Setup menu (menu item A4.2).
104
Protection of the device settings (access levels)
on page 93. Push [^ ^ ^ ^ ] at the end of each step of the procedure to continue
www.drexelbrook.com
DR6500
on page 59.
Empty
table A.
–
DR6500-PM-English-Issue 1