VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) enamel Profibus PA - Manual (Page 10)

3.2 Principle of operation
VEGAPULS 66 is a radar sensor in C-band technology for continuous
level measurement.
The version with enamelled antenna is particularly suitable for
measurement of highly corrosive liquids, preferably in enamelled
vessels under difficult process conditions such as buildup, conden-
sation and foam generation as well as strong product movement.
The antenna of the radar sensor emits short radar pulses with a
duration of approx. 1 ns. These pulses are reflected by the product
and received by the antenna as echoes. The running time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level. The determined level is converted into an
appropriate output signal and outputted as measured value.
Power supply via the Profibus DP/PA segment coupler or VEGALOG
571 EP cards. A two-wire cable according to Profibus specification
serves as carrier of both power and digital data transmission for
multiple sensors. The instrument profile of VEGAPULS 66 corre-
sponds to profile specification version 3.0.
The GSD (instrument master files) and bitmap files necessary for
planning your Profibus-DP-(PA) communication network are available
from the download section on the VEGA homepage www.vega.com
under "Services - Downloads - Software - Profibus". There you can
also find the appropriate certificates. In a PDM environment, an EDD
(Electronic Device Description) is also required to enable the full range
of sensor functions (also available as a download).A CD with the
appropriate files can be ordered via e-mail under [email protected] or
by phone from one of the VEGA agencies under the order number
"
DRIVER.S".
The backlight of the indicating and adjustment module is powered by
the sensor. Prerequisite is a certain level of operating voltage.
The data for power supply are specified in chapter "Technical data".
The optional heating requires its own operating voltage. You can find
detailed information in the supplementary instructions manual "Heating
for indicating and adjustment module". This function is generally not
available for approved instruments.
3.3 Operation
VEGAPULS 66 can be adjusted with different adjustment media:
l with indicating and adjustment module
l with the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard, e.g. PACTware and
PC
l with the adjustment program PDM
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
10 VEGAPULS 66 enamel • Profibus PA
3 Product description
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