Vega VEGABAR 87 Operating Instructions Manual page 71

2. Determination temperature error F
The necessary values are taken from the technical data:
Fig. 40: Determination of the basic temperature error for the above example: F
Measuring cell ver-
sion
Factor FMZ
Tab. 24: Determination of the additional factor measuring cell for above example: F
Turn Down TD 1 : 1
Factor FTD 1
Tab. 25: 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. 26: Determination of the deviation from table: F
VEGABAR 87 • 4 ... 20 mA/HART
T
Measuring cell - Measuring cell climate-compensated, depending on measur-
Standard
0.1 % 10 bar, 25 bar
1 1
TD 2.5 : 1
1.75
and long-term stability F
Kl
TD ≤ 5 : 1
< 0.1 %
50
1 bar, 2.5 bar
2
TD 5 : 1
3
are available in the technical data:
stab
Non-linearity, hysteresis and non-repeatability
= 0.1 %
Kl
11 Supplement
= 0.15 %
TBasis
ing range
0.4 bar
3
= 1
MZ
TD 10 : 1 TD 20 : 1
5.5 10.5
= 1.75
TD
TD > 5 : 1
< 0.02 % x TD
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