Analog Output; Current Output Function (2.5.1.) - Siemens SITRANS L 7ML5400 Operating Instructions Manual

Note
Damping Filter can be set to 0 in order to display measurement readings as fast as fill/empty
rates permit. Fill Rate per Minute, and Empty Rate per Minute work in conjunction with
Damping Filter, therefore, if readings are slow to respond to changes, check that Fill and
Empty Rates are set to values greater than or equal to the desired Response Rate.
A.3

Analog Output

The mA output (current output) is proportional to material level in the range 4 to 20 mA. 0%
and 100% are percentages of the full-scale reading (m, cm, mm, ft, in). Typically mA output is
set so that 4 mA equals 0% and 20 mA equals 100%.
A.3.1

Current Output Function (2.5.1.)

Current Output Function (2.5.1.) (Page 180) controls the mA output and applies any relevant
scaling. By default it is set to LEVEL. Other options are Space, Distance, Volume, Head, Flow,
or Manual. A MANUAL setting allows you to test the functioning of the loop.
You can also set the mA output to report when the device is in an error condition and the fail-
safe timer has expired. By default, the reported value depends on the device type. A standard
device reports the last valid reading, and a NAMUR NE43 compliant device reports the user-
defined value for Material Level (2.4.1.) (Page 179) (3.58 mA by default).
SITRANS LUT400
Operating Instructions, 04/2021, A5E33329501-AG
Technical reference
A.3 Analog Output
301