Emerson Rosemount 3100 Series - Setting the Dead Band (the 3102;3105)

Reference Manual
00809-0100-4840, Rev. BA
July 2008
Rosemount 3100 Series
5-8
d) Press the blue button → to start the editing mode. The first digit flashes to
indicate it can now be edited.
e) Press the green button
↓ repeatedly to edit the flashing digit.
f) Press the blue button
→ to move to the next digit. The digit flashes to
indicate it can be edited.
g) Repeat steps (e) and (f) until the last digit is flashing, and edited as
required.
h) Press the blue button
→ to confirm the new value. (The flashing stops.)
i) If the new value is correct, press the red button
↵ to save. The display
changes to the next menu option.
j) If the new value is incorrect, press the blue button
→ to exit to the menu.
The “LE” re-appears; re-start at step (b) or press
↓ for the next menu.
Setting the Dead Band
(The 3102/3105)
Screen display: dEAd
Factory default value: 0.3 (m)
The dead band is a region below the transmitter face in where no
measurements can be made. This is also known as the Blanking or Blocking
zone, and is a feature common to all ultrasonic level transmitters, with a value
dependent upon certain intrinsic properties of the transmitter.
The dead band should not be lower than the factory default minimum value
unless advised by the manufacturer. A higher value may be entered to stop
the processing of echoes from false targets, but real echoes in the dead band
will also now be ignored.
NOTE:
This menu option is in the engineering menu “Eng”. See “Accessing the
Engineering Menu (The 3102/3105)” on page 5-6 or see Figure C-4 on
page C-5 for a map of the menu structure.
To change the dead band:
a) After entering the “Eng” menu (see the note above), press the green
button
↓ repeatedly until “dEAd” is indicated.
b) Press the blue button
→ to enter the dead band menu. The display
indicates the present dead band value.
c) If this dead band is correct, press the red button
↵ to exit to the menu.
(The menu option “dEAd” re-appears. To get to the next menu, press
↓.)
d) Press the blue button
→ to start the editing mode. The first digit flashes to
indicate it can now be edited.
e) Press the green button
↓ repeatedly to edit the flashing digit.
f) Press the blue button
→ to move to the next digit. The digit flashes to
indicate it can be edited.
g) Repeat steps (e) and (f) until the last digit is flashing, and edited as
required.
h) Press the blue button
→ to confirm the new value. (The flashing stops.)
i) If the new value is correct, press the red button
↵ to save. The display
changes to the next menu option.