VEGA VEGABAR 55 Foundation Fieldbus - climate compensated - Manual (Page 49)

49
10 Supplement
VEGABAR 55 • Foundation Fieldbus - climate compensated
39443-EN-130321
Influence of the product or ambient temperature
Average temperature coefficient of the zero signal
Applies to digital interfaces (HART, Profibus PA, Foundation Fieldbus) as well as to analogue
current output 4 … 20 mA and refers to the set span. Turn down (TD) is the ratio nominal measuring
range/set span.
Nominal measuring range in
bar/kPa
Nominal
measuring
range in psig
Average temperature coef-
ficient of the zero signal, in
the compensated temper-
ature range 0 … +100 °C
(+32 … +212 °F), reference
temperature 20 °C (68 °F)
Average temperature co-
efficient of the zero signal,
outside the compensated
temperature range
0 … 0.2 bar/0 … 20 kPa 0 … 3 psig < (0.05 + 0.05 x TD)%/10K < (0.05 + 0.1 x TD)%/10K
0 … 0.4 bar/0 … 40 kPa 0 … 6 psig < (0.05 + 0.05 x TD)%/10K < (0.05 + 0.1 x TD)%/10K
0 … 1 bar/0 … 100 kPa 0 … 15 psig < (0.02 + 0.05 x TD)%/10K < (0.02 + 0.1 x TD)%/10K
0 … 2.5 bar/0 … 250 kPa 0 … 35 psig < (0.02 + 0.05 x TD)%/10K < (0.02 + 0.1 x TD)%/10K
0 … 5 bar/0 … 500 kPa 0 … 70 psig < (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
0 … 10 bar/0 … 1000 kPa 0 … 150 psig < (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
0 … 25 bar/0 … 2500 kPa 0 … 350 psig < (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
-1 … 0 bar/-100 … 0 kPa -15 … 0 psig < (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
-1 … 1.5 bar/-100 … 150 kPa -15 … 25 psig < (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
-1 … 5 bar/-100 … 500 kPa -15 … 70 psig < (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
-1 … 10 bar/-100 … 1000 kPa -
15 … 150 psig
< (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
-1 … 25 bar/-100 … 2500 kPa -
15 … 350 psig
< (0.02 + 0.03 x TD)%/10K < (0.04 + 0.06 x TD)%/10K
-0.1 … 0.1 bar/-10 … 10 kPa -
1.5 … 1.5 psig
< (0.05 + 0.05 x TD)%/10K < (0.05 + 0.1 x TD)%/10K
-0.2 … 0.2 bar/-20 … 20 kPa -3 … 3 psig < (0.05 + 0.05 x TD)%/10K < (0.05 + 0.1 x TD)%/10K
-0.5 … 0.5 bar/-50 … 50 kPa -7 … 7 psig < (0.05 + 0.05 x TD)%/10K < (0.02 + 0.1 x TD)%/10K
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)