VEGA VEGABAR 82 HART and accumulator pack - Operating Instructions - Manual (Page 58)

58
11 Supplement
VEGABAR 82 • HART and accumulator pack
45029-EN-131107
0,15 %
-0,15 %
-40°C -20°C
20°C
40°C 60°C 80°C
Fig. 24: Thermal change, current output
>>>Long-term stability (according to DIN 16086 and IEC 60770-1)
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to the
analogue current output 4 … 20 mA under reference conditions. The specifications refer to the set
span. Turn down (TD) is the ratio nominal measuring range/set span.
The long-term drift of the zero signal corresponds to the value F
Stab
in chapter "Calculation of the
total deviation (according to DIN 16086)".
Long-term drift of the zero signal
Time pe-
riod
Measuring cell ø 28 mm Measuring cell ø 28 mm
Measuring range
0 … +0.025 bar/0 … +2.5 kPa
Measuring cell
ø 17.5 mm
One year < 0.05 % x TD < 0.1 % x TD < 0.1 % x TD
Five years < 0.1 % x TD < 0.2 % x TD < 0.2 % x TD
Ten years < 0.2 % x TD < 0.4 % x TD < 0.4 % x TD
Long-term drift of the zero signal - Version climate-compensated
Nominal measuring range in bar/
kPa
Nominal meas-
uring range in
psig
Measuring cell ø 28 mm Measuring cell
ø 17.5 mm
0 … 0.4 bar/0 … 40 kPa 0 … 6 psig
< (1 % x TD)/year < (1.5 % x TD)/year
-0.2 … 0.2 bar/-20 … 20 kPa -3 … 3 psig
0 … 1 bar/0 … 100 kPa 0 … 15 psig
< (0.25 % x TD)/year < (0.375 % x TD)/year
0 … 2.5 bar/0 … 250 kPa 0 … 35 psig
-1 … 0 bar/-100 … 0 kPa -15 … 0 psig
-1 … 1.5 bar/-100 … 150 kPa -15 … 25 psig
-0.5 … 0.5 bar/-50 … 50 kPa -7 … 7 psig