Vega VEGAVIB 61 Operating instructions manual - page 8
8
3 Product description
VEGAVIB 63 • NAMUR
31217-EN-170315
Youcanfindtheserialnumberontheinsideoftheinstrumentaswell
as on the type label on the outside.
3.2 Principle of operation
VEGAVIB 63 is a point level sensor with vibrating rod for level detec-
tion.
It is designed for industrial use in all areas of process technology and
is preferably used for bulk solids.
Typicalapplicationsareoverfillanddryrunprotection.Thankstoits
simple and robust measuring system, VEGAVIB 63 is virtually unaf-
fected by the chemical and physical properties of the bulk solid.
It also works when subjected to strong external vibrations or changing
products.
Solid detection in water
If VEGAVIB 63 was ordered for solid detection in water, the vibrating
rod is calibrated to the density of water. If covered by water (density:
1 g/cm³/0.036 lbs/in) VEGAVIB 63 signals "uncovered". Only if the
vibrating element is also covered with solids (e.g. sand, sludge, gravel
etc.) will the sensor signal "covered".
Function monitoring
The electronics module of VEGAVIB 63 continuously monitors the
following criteria:
•
Correct vibrating frequency
•
Linebreaktothepiezodrive
If one of these faults is detected, the electronics signals this via a
definedcurrenttothesignalconditioninginstrument.Theconnection
cable to the vibrating element is also monitored.
Thevibratingrodispiezoelectricallyenergisedandvibratesatits
mechanicalresonancefrequencyofapprox.360Hz.Whenthevibrat-
ing rod is submerged in the product, the vibration amplitude changes.
This change is detected by the integrated electronics module and
converted into a switching command.
VEGAVIB63withNAMURelectronicscanbeconnectedtodifferent
NAMURamplifiersdependingonyourrequirements.Thespecifica-
tionsforNAMURamplifiersareavailableinthe"Technical data".
Thedataforpowersupplyarespecifiedinchapter"Technical data".
3.3 Adjustment
With the factory setting, products with a density of > 0.03 g/cm³
(0.0011 lbs/in³) can be measured. It is possible to adapt the instru-
ment for products with lower density > 0.02 g/cm³ (0.0007 lbs/in³).
Ontheelectronicsmoduleyouwillfindthefollowingdisplayand
adjustment elements:
•
Control lamp for indication of the switching status (yellow)
•
Potentiometer for adaptation to the product density
Application area
Functional principle
Voltage supply