Vega VEGASWING 66 Safety Manual - 3 Planning
5
3 Planning
VEGASWING 66 • Two-wire (8/16 mA)
45309-EN-130722
3 Planning
3.1 Safety function
To monitor a limit level, the sensor detects via the conditions "Vibrat-
ing element uncovered" or "Vibrating element covered" a limiting
valuedefinedbythemountinglocation.
The determined status is signalled at the output with "Current = 8 mA"
or "Current = 16 mA".
3.2 Safe state
The safe status of the output signal is independent of the mode
adjusted on the sensor.
Mode
Overflowprotection
(mode max.)
Dry run protection
(mode min.)
Vibrating element
covered
uncovered
Output current
16 mA ±1.5 mA
16 mA ±1.5 mA
When operating with a signal conditioning instrument VEGATOR 636
or VEGATOR series 100 max. mode must be adjusted on the sen-
sor. The selection of the mode is carried out on the signal condition-
ing instrument.
Mode
Overflowprotection
(mode max.)
Dry run protection
(mode min.)
Vibrating element
covered
uncovered
Output current
16 mA ±1.5 mA
8 mA ±1.5 mA
The safe status of the output signal is independent of the mode evalu-
ated by an SPLC.
Mode
Overflowprotection
Dry run protection
Vibrating element
covered
uncovered
Output current when mode
on the sensor is set to
"max."
16 mA ±1.5 mA
8 mA ±1.5 mA
Output current when mode
on the sensor is set to
"min."
8 mA ±1.5 mA
16 mA ±1.5 mA
Possible fault currents:
•
≤3.6mA("faillow")
•
> 21 mA ("fail high")
3.3 Prerequisites for operation
•
The measuring system should be used appropriately taking pres-
sure, temperature, density and chemical properties of the medium
intoaccount.Theapplication-specificlimitsmustbemaintained.
Safety function
Safe condition when
selecting the mode on the
sensor
Safe condition when
operating with a signal
conditioning instrument
Safe condition when op-
erating with an SPLC
Output signals in case of
malfunction
Instructions and restric-
tions