VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART two-wire - Manual (Page 10)

W ith the version without antenna horn, the antenna system is formed
in conjunction with a measuring tube (surge or bypass tube). This
version is particularly suitable for measurement of solvents and liquid
gases.
F or pressures up to 160 bar (2320 psi) and temperatures up to 400 °C
(752 °F) there are graphite seals and ceramic antenna cones
available.
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 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 manufacturer-specific adjustment programs AMS™ or PDM
l W ith a HART handheld
T he entered parameters are generally saved in VEGAPULS 66,
optionally also in the indicating and adjustment module or in
PACT
ware.
3.4 Packaging, transport and storage
Y our instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
according to DIN EN 24180.
Functional principle
Power supply
Packaging
10 VEGAPULS 66 • 4 … 20 mA/HART two-wire
3 P roduct description
28438
-EN
-090305