VEGA VEGABAR 83 Profibus PA - Operating Instructions - Manual (Page 57)

57
9 Diagnosis, asset management and service
VEGABAR 83 • Profibus PA
45037-EN-131107
F
T
= (0.15 %) x (0.5 + 0.5 x TD)
F
Kl
= 0.075 %
F
a
= 0.15 %
F
perf
= √((0.15 %) x (0.5 + 0.5 x TD) 2 + (0.075 %) 2 ) + (0.15 %) 2 )
F
perf
= 0.24 %
Step 2: Calculation of the total deviation
F
total
= F
perf
+ F
stab
F
stab
= (0.05 % x TD)
F
stab
= (0.05 % x 1.25)
F
stab
= 0.06 %
F
total
= 0.24 % + 0.06 % = 0.30 %
9.6 Exchange process assembly with version
IP 68 (25 bar)
With version IP 68 (25 bar), the user can exchange the process as-
sembly on site. Connection cable and external housing can be kept.
Required tools:
•
Hexagon socket wrench, size 2
Caution:
The exchange may only be carried out in the complete absence of
line voltage.
In Ex applications, only a replacement part with appropriate Ex ap-
proval may be used.
Proceed as follows when carrying out the exchange:
1. Losen the fixing screw with the hexagon socket wrench
2. Carefully detach the cable assembly from the process assembly