VEGA VEGABAR 55 4 … 20 mA_HART - climate compensated - Manual (Page 55)

55
10 Supplement
VEGABAR 55 • 4 … 20 mA/HART - climate compensated
39441-EN-130321
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
-0.1 … 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)
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 under refer-
ence conditions. Specifications refer to the set span. Turn down (TD) is the relation nominal meas-
uring range/set span.
Long-term drift of the zero signal:
Ʋ For one year < 0.05 % x TD
Ʋ For five years < 0.1 % x TD
Ʋ For ten years < 0.2 % x TD
Ambient conditions
Ambient, storage and transport temperature
Ʋ Standard version -40 … +80 °C (-40 … +176 °F)
Ʋ Versions IP 66/IP 68 (1 bar) and IP 68
(25 bar), connection cable PUR
-20 … +80 °C (-4 … +176 °F)
Ʋ Version IP 66/IP 68 (1 bar), connec-
tion cable PE
-20 … +60 °C (-4 … +140 °F)
Process conditions
The specifications of the pressure stage and product temperature are used as an overview. The
specifications on the type label are applicable.