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Safety Manual
00809-0200-5100, Rev GB
Installation and Configuration
February 2017
Installation and Configuration
Table 4-13. Safety Alarm Parameters
Safety Alarm
Parameter
Description
SIL High Alarm Limit Set the desired SIL High Alarm Limit; see “Setting the SIL High Alarm Limit” on page 27.
The SIL High Alarm Limit can be disabled, see Appendix E: Disabling the SIL High Alarm for
further information.
SIL Surface Track Control The following options are available for this safety alarm parameter:
65535: no alarm will be triggered if the 5900 gauge loses track of the product surface
65534: triggers an alarm in case the 5900 gauge loses track of the product surface
0-30000: SIL Low Alarm Limit is enabled by entering the desired alarm limit (0-30000 mm).
Note that the SIL Surface Track Control field is changed to SIL Low Alarm Limit.
SIL Low Alarm Limit Set the desired SIL Low Alarm Limit; see “Setting the SIL Low Alarm Limit” on page 29.
See “How to enable SIL Low Alarm Limit” on page 49 for information on how to enable SIL Low
Alarm Limit.
SIL Antenna Type Ensure that Antenna Type matches the antenna that is mounted on the level gauge (found on
antenna label). See Appendix B: Supported Antennas.
SIL Antenna Type No. Verify that the SIL Antenna Type No. for the selected antenna is presented. Check Table B-1 on
page 69 that the Type No. matches the selected SIL Antenna Type.
SIL Antenna Size In case a Still-pipe Array antenna is used, ensure that SIL Antenna Size matches the antenna that
is mounted on the 5900 Radar Level Gauge.
SIL Antenna Size No. Verify that the SIL Antenna Size No. for the selected antenna is presented. Check Table B-1 on
page 69 that the Size No. matches the selected SIL Antenna Size.
SIL Pipe Diameter Enter the Still Pipe Diameter in case the 5900 has an LPG/LNG antenna or a Still-pipe Array
Antenna. The Still Pipe Diameter is also required for the Cone Pipe PTFE/Quartz antenna (see
Appendix F: Cone Pipe Antenna for more information). The diameter is used by the 5900 Radar
Level Gauge to automatically adjust for the influence of the still pipe on the propagation speed
of the measurement signal.
SIL Calibration Distance Use this parameter for fine tuning the 5900 level gauge in case of minor deviations between
actual distance to the product surface, and distance measured by the 5900 level gauge. The SIL
Calibration Distance should only be used for adjustments in the order of a few millimeters.
Start by setting the SIL Calibration Distance equal to zero. It may be adjusted at a later stage of
the configuration procedure.
See Appendix F: Cone Pipe Antenna for more information on the Cone Pipe antennas.
SIL Hold Off Distance
Adjustment
This parameter can be used to increase the SIL Used Hold Off distance in order to filter out
disturbing objects in the vicinity of the nozzle. Start by setting this parameter equal to zero. It
may be adjusted at a later stage of the configuration procedure.
SIL Used Hold Off
Distance
Hold Off is typically used to reduce the measuring range at the top of the tank, in order to
minimize the influence of disturbances from a nozzle or any other object near the antenna.
Each antenna has a default Hold Off value (SIL Antenna Hold Off Distance) which can not be
changed. The Used Hold Off Distance is equal to the sum of the antenna specific default value
and the SIL Hold Off Distance Adjustment as shown in Figure 4-7 on page 20.
SIL Amplitude Threshold
(Hold Off)
This amplitude threshold is used to filter out disturbing echoes in the Hold Off region.
Ensure that this parameter is equal to 60 000. Normally there is no need to change this value.
SIL Amplitude Threshold This amplitude threshold is used to filter out disturbing echoes and noise.
Start by setting this parameter equal to 400. It will be adjusted at a later stage of the
configuration procedure.
SIL Near Zone Distance
(1)
Set this parameter equal to zero. This parameter is used for advanced configuration and
normally there is no need to change this value.
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