VEGA VEGAPULS 62 (≥ 2.0.0 - ≤ 3.8) standpipe ver. Profibus PA - Manual (Page 10)

3.2 Principle of operation
VEGAPULS 62 is a radar sensor in K-band (emitting frequency
approx. 26 GHz) for continuous level measurement.
A version of VEGAPULS 62 is available for each area of application:
The version with standpipe is particularly suitable for measurement of
solvents and liquid gases in vessels with small process fittings under
extremely difficult process conditions.
The standpipe antenna is also suitable for vessels with foam
generation or for measurement of products with low dielectric figures
(DK > 1.6).
Measurement in a standpipe is not recommended for very adhesive
products.
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 62 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 - Pro
fibus". 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 62 can be adjusted with different adjustment media:
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
10 VEGAPULS 62 standpipe version • Profibus PA
3 Product description
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