VEGA VEGABAR 64 4 … 20 mA_HART - Manual (Page 50)

Basic accuracy analogue output signal in percent:
F
perf
= √((F
T
)
2 + (F
K l
)
2 + (F
a
)
2
)
F
T
= (0.05 % + 0.1 % x TD)
F
K l
= 0.075 %
F
a
= 0.15 %
F
perf
= √((0.05 % + 0.1 % x 1.25) 2 + (0.075 %) 2 + (0.15 %) 2
)
F
perf
= 0.24 %
Total deviation analogue output signal in percent:
F
total
= F
perf
+ F
stab
F
stab
= (0.1 % x TD)/year
F
stab
= (0.1 % x 1.25)/year
F
stab
= 0.125 %
F
total
= 0.24 % + 0.125 % = 0.365 %
Total deviation analogue output signal absolute:
F
total
= 0.365 % x 8 bar/100 % = 29.2 mbar
8.4 Exchanging the electronics module
I n case of a defect, the electronics module can be exchanged by the
user against an identical type. If no electronics module is available on
side, the module can be ordered for the VEGA agency serving you.
O rdering and exchange are possible with or without sensor serial
number. The electronics module with serial number includes order-
specific data such as factory setting, seal material etc. These are not
included in the electronics module without serial number.
T he serial number is stated on the type label of VEGABAR 64 or on the
delivery note.
8.5 Software update
T he following components are required to update the sensor software:
l S ensor
l P ower supply
l VEGACONNECT
l PC
with PACTware
l C urrent sensor software as file
A
t "www.vega.com/downloads" go to "Software". Select under "plics
instruments and sensors" the suitable instrument series. Load the zip
fi
le via the right mouse key with "Save target as" e.g. on the desktop of
your PC. Extract all files available in the zip file, e.g. to the desktop.
Load sensor software to
PC
50 VEGABAR 64 • 4 … 20 mA/HART
8 M aintenance and fault rectification
27525
-EN
-081209