VEGA VEGABAR 82 4 … 20 mA_HART - Operating Instructions - Manual (Page 70)

70
11 Supplement
VEGABAR 82 • 4 … 20 mA/HART
45028-EN-131010
Deviation (according to IEC 60770)
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to the
analogue current output 4 … 20 mA and refers to the set span. Turn down (TD) is the ratio nominal
measuring range/set span.
The specified values correspond to the value F
Kl
in chapter "Calculation of the total deviation".
Accuracy class Non-linearity, hysteresis and re-
peatability with TD 1 : 1 up to 5 : 1
Non-linearity, hysteresis and re-
peatability with 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
Influence of the product or ambient temperature
Thermal change zero signal and output span
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to the
analogue current output 4 … 20 mA and refers to the set span. Turn down (TD) is the ratio nominal
measuring range/set span.
The thermal change of zero signal and output span corresponds to the value F
T
in chapter "Calcu-
lation of the total deviation (according to DIN 16086)".
Measuring cell - Standard
Medium or ambient tem-
perature T
Accuracy class 0.05 %,
0.1 %
Accuracy class 0.2 % Accuracy class 0.2 %
with measuring range
0.1 bar
abs
-40 … 0 °C (-40 … +32 °F) < {0.15 % + 0.015 %/K x (-
T)} x {0.5+0.5 x TD}
< {0.1 % + 0.03 %/K x (-T)}
x {0.5+0.5 x TD}
< {0.30 % + 0.03 %/K x (-
T)} x {0.5+0.5 x TD}
0 … 40 °C
(+32 … +104 °F)
< {0.0075 %/K x (T -
20 °C)} x {0.5+0.5 x TD}
< {0.005 %/K x (T - 20 °C)}
x {0.5+0.5 x TD}
< {0.015 %/K x (T - 20 °C)}
x {0.5+0.5 x TD}
40 … 100 °C
(+104 … +212 °F)
< {0.15 % } x {0.5+0.5 x
TD}
< {0.005 %/K x (T - 20 °C)}
x {0.5+0.5 x TD}
< {0.3 % } x {0.5+0.5 x TD}
100 … 120 °C
(+212 … +248 °F)
< {0.15 % + 0.005 %/K x (T
- 100 °C)} x {0.5+0.5 x TD}
< {0.40 % + 0.01 %/K x (T -
100 °C)} x {0.5+0.5 x TD}
< {0.30 % + 0.01 %/K x (T -
100 °C)} x {0.5+0.5 x TD}
Measuring cell - climate-compensated
Compensated temperature range
0 … +100 °C (+32 … +212 °F)
Non-compensated temperature range -40 … 0 °C (-40 … +32 °F), -100 … +130 °C
(+212 … +276 °F)