VEGA VEGABAR 52 4 … 20 mA_HART - climate compensated - Manual (Page 54)

54
10 Supplement
VEGABAR 52 • 4 … 20 mA/HART - climate compensated
36718-EN-130321
Nominal measuring range in
bar/kPa
Nominal
measuring
range in psig
Average temperature co-
efficient of the zero signal
and the output span, in
the compensated temper-
ature range 0 … +100 °C
(+32 … +212 °F), reference
temperature 20 °C (68 °F)
Average temperature coeffi-
cient of the zero signal and
the output span, outside
the compensated tempera-
ture range
-0.1 … 0.1 bar/-10 … 10 kPa -
1.5 … 1.5 psig
< (0.15 + 0.4 x TD)% < (0.15 + 0.6 x TD)%
-0.2 … 0.2 bar/-20 … 20 kPa -3 … 3 psig < (0.15 + 0.4 x TD)% < (0.15 + 0.6 x TD)%
-0.5 … 0.5 bar/-50 … 50 kPa -7 … 7 psig < (0.1 + 0.2 x TD)% < (0.1 + 0.3 x TD)%
Thermal change of the current output
Applies also to the analogue 4 … 20 mA current output and refers to the set span.
Thermal change, current output
< 0.05 %/10 K, max. < 0.15 %, each with -40 … +80 °C
(-40 … +176 °F)
0,15 %
-0,15 %
-40°C -20°C
20°C
40°C 60°C 80°C
Fig. 28: Thermal change, current output
Long-term stability (according to DIN 16086 and IEC 60770-1)
Applies to digital HART interface as well as to analogue current output 4 … 20 mA. Specifications
refer to the set span. Turn down (TD) is the relation nominal measuring range/set span.
Nominal measuring range in bar/kPa Nominal measuring
range in psig
Long-term drift of the zero signal
0 … 0.2 bar/0 … 20 kPa 0 … 3 psig < (1 % x TD)/year
0 … 0.4 bar/0 … 40 kPa 0 … 6 psig < (1 % x TD)/year
0 … 1 bar/0 … 100 kPa 0 … 15 psig < (0.25 % x TD)/year
0 … 2.5 bar/0 … 250 kPa 0 … 35 psig < (0.25 % x TD)/year
0 … 5 bar/0 … 500 kPa 0 … 70 psig < (0.1 % x TD)/year
0 … 10 bar/0 … 1000 kPa 0 … 150 psig < (0.1 % x TD)/year
0 … 25 bar/0 … 2500 kPa 0 … 350 psig < (0.1 % x TD)/year
0 … 60 bar/0 … 6000 kPa 0 … 900 psig < (0.1 % x TD)/year
-1 … 0 bar/-100 … 0 kPa -15 … 0 psig < (0.25 % x TD)/year
-1 … 1.5 bar/-100 … 150 kPa -15 … 25 psig < (0.25 % x TD)/year
-1 … 5 bar/-100 … 500 kPa -15 … 70 psig < (0.1 % x TD)/year