Nivus OCM F, Инструкция по эксплуатации

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Parameter Setting
OCM F - rev. 05 / 06.04.2018 page 59
Fig. 23-22 Selection flow
Fig. 23-23 Setting constant current
The following menu points will not be indicated on the display before the analog output has
been enabled for output of flow, level, velocity, signal quality or temperature readings.
>Span< Toggle between measurement ranges of >0…20 mA< or >4…20 mA<
>Value at 4 mA<
Enter the measurement value at 4 mA.
Example:
A measurement place is partially tending to backwater formation.
Negative values shall be recorded as well; the following recording or
process conducting system however has only one analog input left
available. In this case the analog output signal is set to have a “float-
ing” behaviour.
This means that flow = 0 is going to output the 12 mA analog signal:
•
4 mA = -100 l/s
•
20 mA = 100 l/s
Backwater will cause the analog signal to decrease, positive flow will
cause the signal to increase.
>Value at
20 mA< Enter the measurement value at 20 mA
>Error mode< If this parameter has been enabled it is possible to set the analog
output to a defined value in case of error. After activation the points
“Error input mask” as well as “Value at errors” can be selected (see
Fig. 23-24).
>Error input
mask< This point is accessible only if error mode has been activated. Output
signals can be assigned to the respective error here.
Available are:
-
Sensor
-
External level
-
Temperature
-
Battery
-
External setpoint
-
Control unit
Velocity is currently not yet available.
Choose the desired function with the >up< or >down< arrow keys and
confirm by pressing ENTER. A tick will appear as soon as the function
has been confirmed. Pressing ENTER once more will deactivate the
function again. Leave this point by pressing ESC (see Fig. 23-25).