How To Make A Filter To Remove Radar Signal Interference - Honeywell SmartLine RM60 Handbook

OPERATION
6

6.4.7 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 item A.1.3) 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 6-7: 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 location
5 Silo bottom signal
6 Support beam signals (interference signals) before the device does the empty spectrum scan
7 Bad quality (mixed) signals of the solid and the support beam 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.
• Get access to the Main Menu
i For more data, refer to
• Go to Main Menu > Quick Setup > Setup Mode > Empty Spectrum Main Menu > Quick Setup > Setup Mode > Empty Spectrum Main Menu > Quick Setup > Setup Mode > Empty Spectrum. Main Menu > Quick Setup > Setup Mode > Empty Spectrum
• Is the tank completely full? Select Yes
i If you select Yes
the procedure.
• Are all the moving parts switched on? Select Yes
• Is your tank partially filled or completely empty? Select Partially filled
[^ ^ ^ ^ ].
• Do you want to use the average value or the maximum value? Select Average
then push [^ ^ ^ ^ ].
i Use the maximum for tanks that have moving parts. Use the average value for tanks that do
not have moving parts. The device will do an empty spectrum scan and then display the
results on the signal screen.
• Push [^ ^ ^ ^ ]. Do you want to save the spectrum. Select Yes
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Main Menu of the supervisor mode. Main Menu Main Menu
How to get access to the supervisor mode
Yes or No Yes Yes
Yes, the device will not do the empty spectrum scan. Empty the tank and repeat Yes Yes
www.honeywell.com/ps
No and then push [^ ^ ^ ^ ]. No No
Yes or No No and then push [^ ^ ^ ^ ].
Yes Yes No No
Partially filled or Empty
Partially filled Partially filled
Yes or No No and then push [^ ^ ^ ^ ].
Yes Yes No No
SMARTLINE® RM60 (FMCW)
on page 47.
Empty and then push
Empty Empty
Average or Maximum Average Average Maximum and Maximum Maximum
34-VF-25-31 iss.4 GLO December 15 US