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Safety Manual
00809-0200-5100, Rev GB
Installation and Configuration
February 2017
Installation and Configuration
4.2.7 How to filter out LPG Verification Pin or Reference Reflector
In LPG tanks, a verification pin is mounted in the still-pipe in order to allow verification of level
measurements in a pressurized tank. At a certain stage of the Safety Alarm Setup you should
temporarily filter out the verification pin in order to let the 5900 detect the product surface.
The same principle is applicable in case a reference reflector for proof testing is installed in the
tank. Just as the LPG verification pin, the reference reflector needs to be filtered out to ensure
that the 5900 tracks the actual product surface.
If the 5900 gauge has locked on the pin/reflector, the distance to it is presented as the
SIL Surface Distance since the gauge interprets the pin/reflector as the product surface. For the
same reason, the amplitude of the radar echo from the pin/reflector is presented as the SIL
Surface Amplitude.
The two parameters SIL Ref. Refl./LPG Pin Distance and SIL Ref. Refl./LPG Pin Amplitude are used to
filter out the radar echo caused by the verification pin/reference reflector:
1. Ensure that the Change Safety Alarm Parameters window is open.
2. Set the SIL Ref. Refl./LPG Pin Distance = SIL Surface Distance.
3. Set the SIL Ref. Refl./LPG Pin Amplitude to 10% above the SIL Surface Amplitude.
4. In the Change Safety Alarm Parameters window, click the Apply button and wait until the
SIL Bock Update symbol indicates that the gauge has processed the updated
parameters.
5. Again, check SIL Surface Distance to verify that the 5900 detects the actual product
surface. Note that at this stage the SIL Reference Reflector/LPG Pin may appear as a
disturbing object in the Measurement Information pane. The position will be the same
as the position of the SIL Reference Reflector/LPG Pin within a few millimeter given by the
instrument accuracy.
6. Verify that correct SIL Radar Sweep Mode is used. You can, for example, check the
model code and ensure that Level Measurement Method complies with SIL Radar
Sweep Mode. ETSI is the standard choice for most countries. Use FCC in the USA and for
antenna type LPG.
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