VEGA VEGAMET 391 4 … 20 mA_HART - Manual (Page 22)

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6 Setup with the integrated display and adjustment unit
VEGAMET 391 • 4 … 20 mA/HART
36032-EN-130701
The prerequisite for this is the support of the HART commands 0, 1,
3, and 15. This information and which measured values are transmit-
ted can be found in the operating instructions manual of the respec-
tive sensor manufacturer.
Carry out your settings via the appropriate keys and save with [OK].
The measured variable defines the applicaton of the measurement
loop, the following settings are available depending on the connected
sensor:
•
Level
•
Process pressure
•
Universal
•
Temperature
•
Interface
•
Flow (only after activating via PACTware or DTM)
Carry out your settings via the appropriate keys and save with [OK].
Through the adjustment the input value of the connected sensor is
converted into a percentage value. This conversion step allows any
input value range to be depicted in a relative range (0 % up to 100 %).
Before carrying out the adjustment, the requested adjustment unit can
be selected. With input selection "Analogue", the adjustment unit is al-
ways "mA". If the HART input is activated, the available unit depends
on the sensor type. With radar, ultrasonic and guided microwave this
is always the distance in metres or feet "m(d)" or "ft(d)", and with pres-
sure transmitters it is e.g. "bar" or "psi".
The following illustrations and examples relate to the min./max. ad-
justment of a radar sensor with HART communication.
1. With [OK] you prepare the percentage value for editing, with [->]
you place the cursor to the requested position. Set the requested
percentage value with [+] and save with [OK].
2. After entering the percentage value for the min. adjustment, the
suitable distance value must be entered. If you want the use the
Meas. loop - Parameter
Meas. loop - Adjustment