7
3 Product description
VEGACAP 35 • Relay (DPDT)
33759-EN-230510
•
Article numbers, documentation
With the serial number, you can access the delivery data of the instru-
Search
". You can find the serial number
on the inside of the instrument as well as on the type label on the
outside.
3.2 Principle of operation
VEGACAP 35 is an adjustment-free, capacitive point level sensor for
bulk solids.
Typical applications are overfill and dry run protection.
The probe works in liquids from a dielectric constant of 1.5.
Probe, measured product and vessel wall form an electrical capacitor.
The capacitance is influenced by three main factors.
1
2
3
Fig. 2: Functional principle - Plate capacitor
1 Distance between the electrode surfaces
2 Size of the electrode surfaces
3 Type of dielectric between the electrodes
The probe and the vessel wall are the capacitor plates. The measured
product is the dielectric. Due to the higher dielectric constant of the
product compared to air, the capacitance increases as the probe is
gradually covered.
The capacitance change is converted by the electronics module into
a switching command.
VEGACAP 35 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 pump etc.).
The data for power supply are specified in chapter "
Technical data
".
3.3 Adjustment
The probe can be adapted to the dielectric constant of the product
directly on the electronics module.
Application area
Functional principle
Voltage supply
