Vega VEGAWELL 52 Operating Instructions Manual page 34

10 Supplement
Reference conditions and influencing variables (according to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Ʋ Temperature
Ʋ Relative humidity
Ʋ Air pressure
Determination of characteristics
Characteristic curve
Reference installation position
Influence of the installation position
Deviation determined according to the limit point method according to IEC 60770
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.
Deviation with version < 0.2 %
Ʋ Turn down 1 : 1 up to 5 : 1
Ʋ Turn down up to 10 : 1
Deviation with version < 0.1 %
Ʋ Turn down 1 : 1 up to 5 : 1
Ʋ Turn down up to 10 : 1
Influence of the medium or ambient temperature
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.
Average temperature coefficient of the zero signal
In the compensated temperature range of 0 ... +80 °C (+32 ... +176 °F), reference temperature
20 °C (68 °F).
Average temperature coefficient of the zero signal upon execution < 0.2 %
Ʋ Turn down 1 : 1
Ʋ Turn down up to 5 : 1
Ʋ Turn down up to 10 : 1
Average temperature coefficient of the zero signal upon execution < 0.1 %
Ʋ Turn down 1 : 1
Ʋ Turn down up to 5 : 1
Ʋ Turn down up to 10 : 1
Outside the compensated temperature range:
Average temperature coefficient of the zero signal
Ʋ Turn down 1 : 1
Long-term stability (according to DIN 16086, DINV 19259-1 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.
Long-term drift of the zero signal
Incl. non-linearity, hysteresis and non-repeatability.
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+15 ... +25 °C (+59 ... +77 °F)
45 ... 75 %
860 ... 1060 mbar/86 ... 106 kPa (12.5 ... 15.4 psig)
Limit point adjustment according to IEC 61298-2
Linear
upright, diaphragm points downward
< 0.2 mbar/20 Pa (0.003 psig)
< 0.2 %
< 0.04 % x TD
< 0.1 %
< 0.02 % x TD
< 0.15 %/10 K
< 0.2 %/10 K
< 0.25 %/10 K
< 0.05 %/10 K
< 0.1 %/10 K
< 0.15 %/10 K
typ. < 0.15 %/10 K
< (0.1 % x TD)/year
VEGAWELL 52 • 4 ... 20 mA/HART Pt 100
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