VEGA VEGABAR 67 Foundation Fieldbus - climate compensated - Manual (Page 46)

46
8 Maintenance and fault rectification
VEGABAR 67 • Foundation Fieldbus - climate compensated
39446-EN-130321
•
F
T
: Temperature coefficient (influence of medium or ambient
temperature)
•
F
Kl
: Deviation
Level measurement 1.5 mWs
Ambient temperature 40 °C, product temperature 10 °C
VEGABAR 67 with measuring range 0.2 bar
Deviation < 0.1 %
Calculation of the set Turn Down:
TD = 200 mbar/147 mbar, TD = 1.4
Basic accuracy digital output signal in percent:
F
perf
= √((F
T
) 2 + (F
Kl
) 2 )
F
T
= (0.15 + 0.4 x TD) %
F
Kl
= 0.1 %
F
perf
= √((0.15 % + 0.4 % x 1.4) 2 + (0.1 %) 2 )
F
perf
= 0.72 %
Total deviation digital output signal in percent:
F
total
= F
perf
+ F
stab
F
stab
= (1 % x 1.4)/year
F
stab
= 1.4 %
F
total
= 0.72 % + 1.4 % = 2.12 %
Total deviation digital output signal absolute:
F
total
= 2.12 % x 147 mbar/100 % = 3.11 mbar = 31.77 mm
8.4 Exchanging the electronics module
In 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 from the agency serving you.
Ordering 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.
The serial number is stated on the type label of VEGABAR 67 or on
the delivery note.
8.5 Software update
The software version of VEGABAR 67 can be determined as follows:
•
on the type label of the electronics
•
Via the display and adjustment module
•
via PACTware
You can view all software histories on our website www.vega.com.
Make use of this advantage and get registered for update information
via e-mail.
Example