31
Reference Manual
00809-0100-4840, Rev CB
Section 4: Starting up
February 2015
Starting up
4.3.6 Selecting the Lost Echo action (on the 3101)
Screen display: AL
Default: Hold
The transmitter signals an alarm condition if the target echo is lost for more than 10 seconds.
There are three options for an alarm condition:
Hi The current on the two-wire loop will increase to 21 mA and remain
there until a correct target echo is recovered. The display flashes
alternately “LE” and the alarm action.
Hold The current will freeze at the value it was last reading and remain there
until a correct target echo is recovered. The display flashes alternately
“LE” and the last valid reading.
Lo The current on the two wire loop will decrease to 3.6 mA and remain
there until a correct target echo is recovered. The display flashes
alternately “LE” and the alarm action.
Note
See Figure C-1 on page 102 for a map of the programming menu structure and how to access all
the menu options.
To select a different action
1. If entering the menu system from the PV display, press the green button repeatedly
until the “AL” menu option is indicated (see the above note).
2. Press the blue button
to enter the menu “AL”. The display indicates the present
action setting.
3. If this action is correct, press the red button
and then the green button to get to the
next menu option. Otherwise, continue with step (4).
4. Press the blue button
to start editing. The action flashes to indicate it can be edited.
5. Press the green button
repeatedly to scroll through the actions.
6. Press the blue button
to confirm an action. The flashing then stops.
7. Press the red button
to save if the new action is correct, or press the blue button to
not save. Afterwards, depending on the button pressed, either the “AL” menu or the
next menu appears.
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