VEGA VEGABAR 54 4 … 20 mA User Manual
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10 Supplement
VEGABAR 54 • 4 … 20 mA
36725-EN-130321
Ʋ Air pressure
860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
Determination of characteristics
Limit point adjustment according to IEC 61298-2
Characterstic curve
Linear
Reference installation position
upright, diaphragm points downward
Influence of the installation position
< 0.2 mbar/20 Pa (0.003 psig)
Deviation determined according to the limit point method according to IEC 60770
13)
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to ana-
logue current output 4 … 20 mA and refers to the set span. Turn down (TD) is the ratio nominal
measuring range/set span.
Deviation with version 0.1 %
Ʋ Turn down 1 : 1 up to 5 : 1
< 0.1 %
Ʋ Turn down > 5 : 1
< 0.02 % x TD
Deviation with version 0.2 %
Ʋ Turn down 1 : 1 up to 5 : 1
< 0.2 %
Ʋ Turn down > 5 : 1
< 0.04 % x TD
Influence of the product or ambient temperature
Average temperature coefficient of the zero signal
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to ana-
logue current output 4 … 20 mA and refers to the set span. Turn down (TD) is the ratio nominal
measuring range/set span.
In the compensated temperature range 0 … +100 °C (+32 … +212 °F), reference temperature
20 °C (68 °F).
Average temperature coefficient zero signal
Ʋ Turn down 1 : 1
< 0.05 %/10 K
Ʋ Turn down 1 : 1 up to 5 : 1
< 0.1 %/10 K
Ʋ Turn down up to 10 : 1
< 0.15 %/10 K
Outside the compensated temperature range:
Average temperature coefficient zero signal
Ʋ Turn down 1 : 1
typ. < 0.05 %/10 K
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)
13)
Incl. non-linearity, hysteresis and non-repeatability.