Vega VEGABAR 86 Operating Instructions Manual page 70

10 Supplement
Fig. 29: Determination of the basic temperature error for the above example: F
Turn Down TD 1 : 1
Factor FTD 1
Tab. 49: Determination of the additional factor "turn down" for the above example: F
Turn Down TD 1 : 1
Factor FTD 1
Tab. 50: Determination of the additional factor "turn down" for the above example: F
F = F x F x F
T TBasis MZ TD
F = 0.15 % x 1 x 1.75
T
F = 0.26 %
T
3. Determination of deviation and long-term stability
The required values for deviation F
Accuracy class
0.1 %
Tab. 51: Determination of the deviation from table: F
VEGABAR 86
Time pe-
riod
All measuring ranges
One year < 0.05 % x TD
Five years < 0.1 % x TD
Ten years < 0.2 % x TD
70
TD 2.5 : 1 TD 5 : 1
1.75 3
TD 2.5 : 1 TD 5 : 1
1.75 3
and long-term stability F
Kl
Non-linearity, hysteresis and non-repeatability
TD ≤ 5 : 1
< 0.1 %
= 0.1 %
Kl
Measuring cell ø 28 mm
Measuring range
0 ... +0.025 bar/0 ... +2.5 kPa
< 0.1 % x TD
< 0.2 % x TD
< 0.4 % x TD
50
= 0.15 %
TBasis
TD 10 : 1
5.5
= 1.75
TD
TD 10 : 1
5.5
= 1.75
TD
are available in the technical data:
stab
TD > 5 : 1
< 0.02 % x TD
Measuring cell
ø 17.5 mm
< 0.1 % x TD
< 0.2 % x TD
< 0.4 % x TD
VEGABAR 86 • Modbus and Levelmaster protocol
TD 20 : 1
10.5
TD 20 : 1
10.5