Emerson Rosemount 3100 Series - Setting Lost Echo Time (the 3102;3105)

Reference Manual
00809-0100-4840, Rev. BA
July 2008
5-7
Rosemount 3100 Series
b) Press the blue button → to enter the menu for “t.HoLd”.
The display indicates the present threshold value.
c) If the threshold value is correct, press the red button
↵ to exit to the menu.
(The menu option “t.HoLd” re-appears. To get to the next menu option,
press the green button
↓.)
d) Press the blue button
→ to start the editing mode. If the present setting is
“Auto”, press the green button
↓ to change to a three digit number. The
first of the three digits flashes to indicate a number can now be edited.
e) Press the green button
↓ repeatedly to edit the flashing digit.
(To restore the “Auto” setting, scroll past “9” and press the red button
↵ to
save and exit.)
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 “t.HoLd” re-appears; re-start at step (b) or press
↓ for next menu.
Setting Lost Echo Time
(The 3102/3105)
Screen display: LE
Factory default value: 900
The lost echo time is the seconds that the transmitter will wait before taking
the lost echo alarm action (see “Selecting the Alarm Condition Action (The
3102/3105)” on page 4-25.)
A value up to 9999 can be entered. It is recommended that the lost echo time
remains set to 900 seconds to avoid false trips and alarms from a temporary
loss of echo caused by transient poor surface conditions.
A lower lost echo time should only be programmed if it is important that the
lost echo alarm action is taken more quickly (see “Selecting the Alarm
Condition Action (The 3102/3105)” on page 4-25.)
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 lost echo time:
a) After entering the “Eng” menu (see the note above), press the green
button
↓ repeatedly until “LE” is indicated.
b) Press the blue button
→ to enter the menu for “LE”. The display indicates
the present lost echo time value.
c) If this lost echo time is correct, press the red button
↵ to exit to the menu.
(The menu option “LE” re-appears. To get to the next menu, press
↓.)