3 adjustment – VEGA VEGAVIB 65 - contactless electronic switch User Manual

Page 9

It functions even when exposed to strong external vibration or

changing products.
Solid detection in water

If VEGAVIB 65 was ordered for solid detection in water, the

tuning fork is to the density of water. In air or if covered by

water (density: 1 g/cm³/0.036 lbs/in) VEGAVIB 65 signals

uncovered. Only if the vibrating element is also covered with

solids (e.g. sand, sludge, gravel etc.) will the sensor signal

covered.
Fault monitoring

The electronics of VEGAVIB 65 continuously monitors the

following criteria:

Correct vibrating frequency

Line break to the piezo drive

If one of the stated malfunction is detected or in case of power

failure, the electronics takes on a deﬁned switching condition,

i.e. the contactless electronic switch opens (safe condition).

The tuning fork is piezoelectrically energised and vibrates at its

mechanical resonance frequency of approx. 150 Hz. When the

tuning fork is submerged in the product, the vibration

amplitude changes. This change is detected by the integrated

oscillator and converted into a switching command.

VEGAVIB 65 is a compact instrument, i.e. it can be operated

without external evaluation system. The integrated electronics

evaluates the level signal and outputs a switching signal. With

this switching signal, a connected device can be operated

directly (e.g. a warning system, a PLC, a pump etc.).
The exact range of the supply voltage is speciﬁed in the

"Technical data" in the "Supplement".

3.3 Adjustment

With the factory setting, products with a density of >0.02 g/cm³

(>0.0008 lbs/in³) can be measured. It is possible to adapt the

instrument for products with lower density >0.008 g/cm³

(>0.0003 lbs/in³).
On the electronics module you will ﬁnd the following indicating

and adjustment elements:

signal lamp for indication of the switching condition (green/

red)

potentiometer for adaptation to the product density

Physical principle

Power supply

VEGAVIB 65 - with contactless electronic switch

Product description

29284

-EN

-060508