Emerson Rosemount 3100 Series, Reference Manual, Page: 55 / 144

Reference Manual
00809-0100-4840, Rev. BA
July 2008
4-25
Rosemount 3100 Series
Selecting the Alarm
Condition Action
(The 3102/3105)
Screen display:
AL
Factory default value:
Hold
The Rosemount 3102 and Rosemount 3105 can signal an alarm condition if
the target echo is lost for 900 seconds or more. The 900 seconds is factory
set and is changeable in the field.
There are three actions to choose from:
Hi
The current on the two-wire loop increases to 21.75 mA (for the
Rosemount Standard) or 22.5 mA (for NAMUR NE43), depending on
full model code (see page “Ordering Information“ on page A-6).
The current stays at that level until the correct target echo is
recovered. The display flashes alternately “
LE
” and the last PV.
Hold
The current freezes at the last PV value and stays frozen until the
correct target echo is recovered. The display flashes alternately “
LE
”
and the last PV.
Lo
The current on the two-wire loop decreases to 3.75 mA (for
Rosemount Standard) or 3.6 mA (for NAMUR NE43), depending on
full model code (see page “Ordering Information“ on page A-6).
The current stays at that level until the correct target echo is
recovered. The display flashes alternately “
LE
” and the last PV.
NOTE:
This menu option is in the programming menu. See Figure C-2 on page C-3
for a map of the menu structure and how to access the menu options.
To change the selected action:
a) If entering the menu system from the PV display, press the green button
↓
repeatedly until the “
AL
” menu option is indicated (see above note.)
b) Press the blue button
→
to enter the “
AL
” alarm menu and display the
selected action.
c) If the selected action is correct, press the red button
↵
to exit to the menu.
(The menu option “
AL
” re-appears. To get to the next menu, press
↓
.)
d) Press the blue button
→
to start the editing mode. The selected action
flashes to indicate it can now be edited.
e) Press the green button
↓
repeatedly to scroll through the list of actions
(see above.)
f) Press the blue button
→
to confirm the new action. (The flashing stops.)
g) If the new action is correct, press the red button
↵
to save. The display
changes to the next menu option.
h) If the new action is incorrect, press the blue button
→
to exit to the menu.
The menu option “
AL
” re-appears; re-start at step (b) or press
↓
for the
next menu option.