How To Measure Correctly In Silos With Curved Or Conical Bottoms - Honeywell SmartLine RM60 Handbook

SMARTLINE® RM60 (FMCW)
i If you select Yes
remove radar signal interference.
INFORMATION!
For more data on empty spectrum scans, refer to Function description on page 53
Quick Setup (menu item A.1.3).

6.4.8 How to measure correctly in silos with curved or conical bottoms

It is possible that the device cannot find the bottom of the silo if it is installed in a silo with a dish-
shaped or conical bottom. The form of the silo bottom causes a delayed radar reflection and the
device will display the error message "Measurement is lost in the tank bottom".
You can offset the tank bottom reference point to find the delayed radar reflection. Obey the
instructions that follow:
• Empty the silo.
• Increase the tank height in menu C.1.2.
• Go to the signal screen
You will see a graph of reflections.
i
• Push [> > > > ] to move the cursor to the reflection with the largest amplitude (given in dB).
• Make a note of the distance of the reflection measured by the device.
The distance to the reflection will be the new silo height.
i
• Subtract the distance to the reflection from the true silo height.
• Go to Supervisor > Advanced Setup > Installation Setup > Tank Bottom Offset Supervisor > Advanced Setup > Installation Setup > Tank Bottom Offset.
Supervisor > Advanced Setup > Installation Setup > Tank Bottom Offset Supervisor > Advanced Setup > Installation Setup > Tank Bottom Offset
• Type in the difference you calculated as a negative value.
i A negative value will move the reference point above the silo bottom (as given in menu item
C.1.2 Tank height).
• Push [^ ^ ^ ^ ].
• Push [> > > > ] and [ ] (Esc) at the same time to exit to the "save settings" window.
• Select Save Save and push [^ ^ ^ ^ ].
Save Save
i The device will go back to operator mode.
34-VF-25-31 iss.4 GLO December 15 US
Yes, the device will use the empty spectrum scan results to make a filter to Yes Yes
signal screen in operator mode.
signal screen signal screen
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OPERATION
6
– table A.
69