70
Reference Manual
00809-0100-4840, Rev CB
Section 5: Service and Troubleshooting
February 2015
To store a false target echo
1.
After entering the “Eng” menu (see the note above), press the green button
repeatedly until “Lrn” is indicated.
2.
Press the blue button
to enter the “Lrn” menu. The display indicates “LrnX” where
“X” (0 to 4) is the number of stored false target echoes.
3.
To store a new false echo, press and hold the blue button
for five seconds.
4.
The display alternately flashes “Lrn” and the false target position. After four seconds,
the false target position is stored and the display re-indicates “LrnX”.
5.
Press the red button
to save this false echo and exit to the menu. If this false echo
shouldn't be saved, press the blue button
to exit the menu.
6.
To store another false target echo, re-start at step (
).
7.
To get to the next menu option, press the green button
.
Note
If there are four false echoes stored (“Lrn4”), the transmitter will not allow another echo to be
stored until the memory is cleared (see procedure below).
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 20 cm.
To clear all the stored false echoes
1.
After entering the “Eng” menu (see the note above), press the green button
repeatedly until “Lrn” is indicated.
2.
Press the blue button
to enter the “Lrn” menu.
3.
With the display indicating “LrnX”, press and hold the green button
for ten seconds to
clear the memory. The display then indicates “Lrn0”.
4.
To exit to the menu system press the red button
. The menu option “Lrn” re-appears.
5.
See the previous procedure for how to store new false echoes or press the green button
to get to the next menu option.
Summary of Contents for Rosemount 3101
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Page 68: ...56 Reference Manual 00809 0100 4840 Rev CB Section 4 Starting up February 2015 Starting up ...
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