Emerson Rosemount Apex, Reference Manual

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Reference Manual
00809-0100-4731, Rev FA
April 2003
APEX
™
and APEX Sentry
™
Radar Gauge
3-35
• False Echoes - minimizes reflection from a false target that is within
the measurement range. Use this when the gauge occasionally locks
on a false target when the level drops below it.
To use this function, the false target must be identified by its bin
number. To learn this, run a tank plot and spectrum (under the
Advanced Tab ) and locate the false target and associated bin number.
Input this value as shown in Figure 3-31. Consult the factory for
assistance.
Figure 3-31. Quick Pick Option -
False Echo
• Bottom of Tank - allows the gauge to track just beyond the LNZ
without alarming. This option prevents the gauge from locking onto the
tank bottom. The Bottom of Tank tab is often used in flat bottom tanks
with low dielectric fluids.
• Noisy Applications - includes applications with high turbulence or
occasional foam where the level target will disappear for short periods
of time. This option increases the amount of time that gauge will look
for a target within the tracking window before alarming.
Figure 3-32. Quick Pick Option -
Noisy Applications
APEX/RCT/APEX_22AA.TIF
APEX/RCT/APEX_20AA.TIF