VEGA VEGAWELL 72 4 … 20 mA_HART PT 100 - Manual (Page 36)

Total deviation (similar to DIN 16086)
T he total deviation F
t
, also called practical deviation, is the sum of the basic accuracy F
p
and long-term stability:
F
t
= F
p
+ F
s
F
perf
= √((F
T
)
2
+ (F
K l
)
2
)
W ith
-
F
t
: F
total
, total deviation
-
F
p
: F
perf
,
basic accuracy
-
F
s
: F
stab
,
long-term drift
-
F
T
: T
emperature coefficient (influ-
ence of medium or ambient tem-
perature)
-
F
K l
: D eviation
Ambient conditions
A mbient temperature
-
C onnection cable PE -40 … +60 °C (-40 … +140 °F)
-
C onnection cable PUR, FEP -40 … +80 °C (-40 … +176 °F)
S
torage and transport temperature
-40 … +80 °C (-40 … +176 °F)
Process conditions
M ax. process pressure, transmitter 8)
-
M easuring range 0.1 bar (1.45 psig) 15 bar (218 psig)
-
M
easuring range 0.2 bar (2.9 psig) 20 bar (290 psig)
-
M
easuring range ≤ 0.4 bar (5.8 psig) 25 bar (363 psig)
P
ressure stage, process fitting
-
U nassembled threaded fitting 316L: PN 3, PVDF: unpressurized
-
T hread on the housing PN 3
P
roduct temperature, depending on the version
Suspension cable Measuring cell seal Product temperature
PE FKM -20 … +60 °C (-4 … +140 °F)
PUR FKM -20 … +80 °C (-4 … +176 °F)
PUR FFKM -20 … +80 °C (-4 … +176 °F)
FEP FFKM -10 … +80 °C (+14 … +176 °F)
8) L imited by the overpressure resistance of the measuring cell.
36 VEGAWELL 72 • 4 … 20 mA/HART PT
9 S upplement
34360
-EN
-080806