6.2 Deep well monitoring
The water depth relative to the distance of the water surface to
the well entry at ground level in a deep well is to measured and
displayed. Additionally the filling sequence is to be displayed on
the bargraph between 0% and 100% and retransmitted to a
data recorder as a 0 - 10 V signal. If the system becomes faulty
then the analogue output is to transmit the 0% value.
Example:
Setting up:
6.3 Volume measurement in a storage tank
The amount of grain filled into a silo is to be recorded,
displayed and retransmitted to a PLC. A 4-20 mA level sensor
powered by the loop power from the unit measures the filled
height in the silo. The relationship between filling height (m)
and volume (m³) is known and the the sensor current is
proportional to the height. The calculated volume is retrans-
mitted at trhe analogue output as a proportional 0-20 mA
Menu group Address Value
Analogue input
INPUT Input range RANG
Curve CURVE
4-20
LINAR
Display
DISPL Decimal point DI DP
Display value 0% DI LO
Display value 100% DI HI
Scale bargraph/analog 0% BG LO
Scale bargraph/analog 100% BG HI
99999
14
3
14
3
Analogue output
OUTPT Output range RANG
Fault operation FAIL
0-10V
MIN
Well full:
- Sensor signal 20 mA
- Numeric display is to
display 3 m
- Bargraph is to display 100%
- 10 V is to be set at the
analogue output.
Well empty:
- Sensor signal 4 mA
- Numeric display is to
display 14 m
- Bargraph is to display 0%
- 0 V is to be set at the
analogue output.
Process display
66
EN-RIA03.CHP
Thu Jan 11 14:09:47 2001
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