Vega VEGASCAN 693 Operating Instructions Manual page 21

Meas. loop - Adjustment
VEGASCAN 693 • 15-channel HART signal conditioning instrument
6 Setup with the integrated display and adjustment unit
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 which 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 pressure 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
currently measured distance value, select the menu item "Accept"
(live adjustment or adjustment with medium). If the adjustment
should be carried out independent of the measured level, then
select the option "Edit". Enter now the distance value in m [m(d)]
for the empty vessel that is suitable for the percentage value, e.g.
distance from the sensor to the vessel bottom (dry adjustment or
adjustment without medium).
3. Save your settings with [OK] and move to "Max. adjustment" with
[->].
4. As described previously, enter now the percentage value for max.
adjustment and confirm with [OK].
5. After entering the percentage value for the max. adjustment, the
suitable distance value must be entered. If you want the use the
currently measured distance value, select the menu item "Accept"
(live adjustment or adjustment with medium). If the adjustment
should be carried out independent of the measured level, then
select the option "Edit". Enter now the distance value in m [m(d)]
for the full vessel that is suitable for the percentage value (dry
adjustment or adjustment without medium). Keep in mind that the
max. level must be below the radar antenna.
6. Finally save your settings with [OK], the adjustment is finished.
Keep in mind that this adjustment refers only to the measurement
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