VEGA VEGABAR 64 4 … 20 mA_HART - Manual (Page 9)

l T echnical data: Measuring range, process pressure, process
temperature, signal output, voltage supply, protection, protection
class
l O rder number
l A rticle numbers documentation
l SIL identification (with SIL rating ex works)
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
VEGABAR 64 is a pressure transmitter for use in the paper, food
processing and pharmaceutical industries as well as in water/sewage
water plants. Depending on the version, it is used for level, gauge,
absolute pressure or vacuum measurement. Measured products are
gases, vapours and liquids, also those containing abrasive substan-
ces.
T he sensor element is the CERTEC ® measuring cell with flush,
abrasion resistant ceramic diaphragm. The hydrostatic pressure of the
medium or the process pressure causes a capacitance change in the
measuring cell via the diaphragm. This change is converted into an
appropriate output signal and outputted as measured value.
T he CERTEC ® measuring cell is also equipped with a temperature
sensor. The temperature value can be displayed via the indicating and
adjustment module or processed via the signal output.
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 background lighting of the indicating and adjustment module is
powered by the sensor. Prerequiste is a certain heigt of the operating
voltage. You can find the exact voltage specifications in chapter
"Technical data".
T he optional heating requires its own operating voltage. You can find
details in the supplementary instructions manual "Heating for indicat-
ing and adjustment module".
T his function is generally not available for approved instruments.
3.3 Operation
VEGABAR 64 can be adjusted with different adjustment media:
Application area
Functional principle
Power supply
VEGABAR 64 • 4 … 20 mA/HART 9
3 P roduct description
27525
-
EN
-081209