Flowline LU29-1 EchoSonic II - Manual (Page 11)

23 MAR 11 EchoSonic II 11 of 24
Rev B MN300610
Output at Empty
This feature allows you to select the orientation of the 4 to 20mA output
(4 to 20 mA or 20 to 4 mA). Choose which output setting best fits the
application. Typical installations are set with 4 mA at Bottom. This will
not affect the performance of the sensor other than the output of the
EchoSonic II. WebCal’s factory default is 4mA at bottom and 20mA at
top. When connecting your sensor to a display, you must account for
your output settings.
o 4mA at Bottom - The output current will be 4mA when the
sensor measures an empty tank and 20mA when the sensor
measures a full tank.
o 20mA at Bottom - The output current will be 20mA when the
sensor measures an empty tank and 4mA when the sensor
measures a full tank
Startup Condition
This feature allows the operator to select the output current on initial
startup prior to acquiring a true return signal (level measurement).
This only occurs during the initial powering of EchoSonic II and the
transmitter will revert to the correct level reading when the level is
acquired.
o Empty - Selects the start up current established in Output at
Empty. Example: Select 4 mA at Bottom, the output will
remain at 4 mA until the unit acquires a true return echo.
Select 20 mA at Bottom, the output will remain at 20 mA until
the unit acquires a true return echo.
o Mid Tank - When selected, the startup current will read 12
mA until the unit acquires a true return echo.
o Full Tank - Uses the opposite current that was selected in
Output at Empty. Example: If you select 4 mA at Bottom then
the start up current would be 20 mA. If you select 20 mA at
Bottom then the start up current would be 4 mA.
o Overfill (22mA) - The output at startup would be 22 mA. This
condition will remain until the unit acquires a true return echo.
Note: Right click on any menu that you may have questions on to open the help menu.
Note: To reset, press the Clear Screen button.