Vega VEGABAR 82, Руководство по эксплуатации

Страница: 79 / 96

79
11 Supplement
VEGABAR 82 • Profibus PA
45031-EN-220624
2. Determination temperature error F
T
50
(
F
TBasis
Fig. 49: Determination of the basic temperature error for the above example: F
TBasis
= 0.15 %
Measuring cell version
Measuring cell standard, depending on the accuracy class
0.05 %, 0.1 % 0.2 % (0.1 bar
abs
) 0.2 %
Factor FMZ 1 2 3
Tab. 29: Determination of the additional factor measuring cell for above example: F
MZ
= 3
Turn Down TD 1 : 1 TD 2.5 : 1 TD 5 : 1 TD 10 : 1 TD 20 : 1
Factor FTD 1 1.75 3 5.5 10.5
Tab. 30: Determination of the additional factor "turn down" for the above example: F
TD
= 1.75
F
T
= F
TBasis
x F
MZ
x F
TD
F
T
= 0.15 % x 3 x 1.75
F
T
= 0.79 %
3. Determination of deviation and long-term stability
The required values for deviation F
Kl
and long-term stability F
stab
are available in the technical data:
Accuracy class Non-linearity, hysteresis and non-repeatability
TD ≤ 5 : 1 TD > 5 : 1
0.05 % < 0.05 % < 0.01 % x TD
0.1 % < 0.1 % < 0.02 % x TD
0.2 % < 0.2 % < 0.04 % x TD
Tab. 31: Determination of the deviation from table: F
Kl
= 0.2 %