VEGA VEGAPULS 65 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART two-wire - Manual (Page 10)

W ith the serial number, you can access the delivery data of the
instrument via www.vega.com, "VEGA Tools" and "serial number
search". In addition to the type label outside, you can also find the
serial number on the inside of the instrument.
3.2 Principle of operation
VEGAPULS 65 is a radar sensor in C-band technology (emitting
frequency approx. 6 GHz) for continuous level measurement. It is
particularly suitable for vessels with small process fitting that contain
corrosive liquids under simple to difficult process conditions.
T he 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.
T wo-wire electronics 4 … 20 mA/HART for power supply and
measured value transmission over the same cable.
T he supply voltage range can differ depending on the instrument
version.
T he data for power supply are specified in chapter "Technical data".
T he backlight of the indicating and adjustment module is powered by
the sensor. The prerequisite for this is a supply voltage at a certain
level. The exact voltage specifications are stated in chapter "Technical
data".
T he 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 65 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 manufacturer-specific adjustment programs AMS™ or PDM
l W ith a HART handheld
T he entered parameters are generally saved in VEGAPULS 65,
optionally also in the indicating and adjustment module or in
PACT
ware.
Application area
Functional principle
Power supply
10 VEGAPULS 65 • 4 … 20 mA/HART two-wire
3 P roduct description
28437
-EN
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