Emerson Rosemount 3100 Series, Справочное руководство, Страница: 41 / 144

Reference Manual
00809-0100-4840, Rev. BA
July 2008
4-11
Rosemount 3100 Series
NOTE:
When a false echo is stored, the transmitter sets up a 'window' around the
false target and ignores any echo from that window, unless the echo received
from the liquid surface is larger than the stored false echo. There may be no
change in the transmitter output current while the liquid level moves through
this window, which is equivalent to a distance of 8 in. (20 cm).
NOTE:
See Figure C-1 on page C-2 for a map of the programming menu structure
and how to access all the menu options.
To clear all the stored false echoes:
a) If entering the menu system from the PV display, press the green button
↓
repeatedly until the “
Lrn
” menu option is indicated (see above note.)
b) Press the blue button
→
to enter the “
Lrn
” menu.
c) With the display indicating “
LrnX
”, press and hold the green button
↓
for
ten seconds to clear the memory. The display then indicates “
Lrn0
”.
d) Press the red button
↵
to exit to the menu.
e) Press the green button
↓
to exit the menu system and change to the
PV display.
Changing to Distance
Mode (The 3101)
If the transmitter will be measuring distance instead of level, the display can
be changed accordingly. With the PV display indicating the level reading,
press the blue button
→
, and the display will alternate between “
Dist
” and
the distance-to-target.
NOTE:
The display will continue to alternate between “
Dist
” and distance-to-target
until the red button
↵
is pressed to resume the level reading PV display.