Rosemount 5402 - Page 118

Reference Manual
00809-0100-4026, Rev FA
July 2009
Rosemount 5400 Series
7-28
Measured value is locked. May be caused by disturbing object in the
tank
Action:
• Remove disturbing object
• Move the transmitter to another
position
• Use the Echo Tuning function in RRM
to register the false echo causing the
transmitter to lock at the wrong level,
see “Echo Tuning” on page 5-10
• Put an inclined metal plate on top of
the disturbing object
Measured value drops to zero
level.
May be caused by strong echoes from the
tank bottom when product is slightly
transparent.
Action:
• Check the Tank Height
• Make sure that the Bottom Echo
Visible parameter is enabled, see
“Bottom Echo Visible” on page C-4
and C-7
• Try using the Tank Bottom Projection
function if the following conditions are
met:
- The product is transparent
- The tank bottom echo is visible
- The Bottom Echo Visible parameter
is enabled
Measured value drops to zero
level.
(You can verify Empty Tank state
by opening the Tank Display
window in RRM).
If the transmitter loses track of the surface
within the Empty Tank Detection Area, the
tank is considered empty. See section
“Empty Tank Detection Area” on page C-4
and C-8.
Action:
If possible, try another mounting position.
Measured level jumps to a lower
value.
May be caused by:
• Two products layered in the tank
Action:
• Enable the Double Surface function,
see “Surface Echo Tracking” on
page C-5
RRM: Setup > Advanced