VEGA VEGATOR 121 - Manual (Page 14)

14
6 Setup
VEGATOR 121 •
46107-EN-131217
With these switches you can delay the changeover of the relays by
the set time. This can be useful, e.g. with fluctuating product surfaces,
for preventing unwanted switching commands. The switch-on/off
delays can be set independently of each other. If both switches, e.g.
of the switch-on delay, are activated, the times sum up. Delays of 2, 6
or 8 seconds can thus be adjusted.
Information:
Keep in mind that the switching delay of the sensor and signal condi-
tioning instrument accumulate.
The measuring system is continuously monitored. The following
criteria are checked:
•
Line break and shortcircuit (two-wire cable)
•
Interruption of the connection cable to the piezo elements
•
Corrosion or damage on the tuning fork (vibrating rod)
•
Break of the tuning fork (vibrating rod)
•
Loss of vibration
•
Too low vibrating frequency
•
Medium penetration into the sensor (from inside vessel)
When level switches VEGASWING/VEGAVIB/VEGAWAVE in two-wire
version are connected, a function test can be carried out. The test key
is recessed behind the front plate of the signal conditioning instru-
ment. Press the test key for at least one second with a suitable object
(screwdriver, pen, etc.).
By pushing the test key, the circuit to the sensor is interrupted and a
restart of the sensor is initiated. Through this, the conditions fault sig-
nal, empty and full alarm are simulated. Check if the switching relays
have really switched according to the LEDs.
If the test result is negative, the red failure LED lights up and the
relays are deenergized. In this case the whole measuring system has
to be checked and repaired.
Note:
Keep in mind that downstream connected devices are activated dur-
ing the function test. This allows you to check the correct function of
the measuring system.
6.3 Function chart "Point level"
The following chart provides an overview of the switching conditions
depending on the set mode and the level.
Note:
The switching conditions in the tables are only valid if the mode
switch on the sensor is set to "Max.".
Switch-on/Switch-off
delay
Function monitoring
Test key