LW2120
Electronic level sensor
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unit continues to work in normal operation. If, however, it is not received again with sufficient strength
within the delay time, the unit passes into the alert mode and output OUT2 changes into the defined
state.
In case of heavy foam build-up and turbulence, consider the option of creating a steady area.
4.3.4 Simulation function
Various levels can be simulated for set-up, maintenance or interference reduction. The duration of the
simulation can be selected (1 min...1 h). The simulation can be started manually and runs until it is
stopped manually or the set time elapses. During the simulation the outputs respond according to the
simulated process values.
4.3.5 Damping function
With unstable level (e.g. turbulence, wave movements), the output response can be damped. During
damping the determined level values are smoothed by means of a mean filter; the result is a steady
curve.
Damping can be set by means of the parameter [dAP].
[dAP] indicates in seconds after what time 63 % of the final value is reached in the event of a sudden
jump. After 5 x [dAP] almost 100 % has been reached.
4.4 Output response in different operating states
OUT1
OUT2*
Initialisation
OFF
OFF
Normal operation
according to the level and [ou1] and
[SSC1...] settings
according to the level and [ou2], [ASP2]
and [AEP2] settings
Fault / alert mode
OFF
< 3.6 mA at [FOU2] = [OFF]
> 21 mA at [FOU2] = [On]
* If analogue output [ou2] = [I] has been selected.
If the switching function has been selected: see column OUT1.
Additional information about the analogue output
Full signal
With rising curve
20...20.5 mA
With dropping curve
4...3.8 mA
Empty signal
With rising curve
4...3.8 mA
With dropping curve
20...20.5 mA
