Vega VEGABAR 51 Operating Instructions Manual page 56

10 Supplement
Reference conditions and actuating variables (similar to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Temperature
-
Relative humidity
-
Air pressure
-
Determination of characteristics
Characteristics
Reference installation position
Influence of the installation position
Deviation determined according to the limit point method according to IEC 60770
Applies to digital interfaces (HART, Profibus PA, Foundation Fieldbus) as well as to analogue
current output 4 ... 20 mA. Specifications refer to the set span. Turn down (TD) = nominal
measuring range/set span.
Deviation
Turn down 1 : 1
-
Turn down up to 5 : 1
-
Turn down up to 10 : 1
-
Influence of the product or ambient temperature
Applies to instruments with digital signal output (HART, Profibus PA, Foundation Fieldbus) as well
as to instruments with analogue current output 4 ... 20 mA. Specifications refer to the set span.
Turn down (TD) = nominal measuring range/set span.
Thermal change zero zignal, reference temperature 20 °C (68 °F):
In the compensated temperature range
-
0 ... +100 °C (+32 ... +212 °F)
Outside the compensated temperature
-
range
Applies also to instruments with analogue 4 ... 20 mA current output and refers to the set span.
Thermal change, current output
Long-term stability (similar to DIN 16086, DINV 19259-1 and IEC 60770-1)
Applies to digital interfaces (HART, Profibus PA, Foundation Fieldbus) as well as to analogue
current output 4 ... 20 mA. Specifications refer to the set span. Turn down (TD) = nominal
measuring range/set span.
Long-term drift of the zero signal
Ambient conditions
Ambient, storage and transport temperature
Standard version
-
56
+18 ... +30 °C (+64 ... +86 °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
depending on the isolating diaphragm version
< 0.2 %
< 0.2 %
< 0.3 %
< 0.05 %/10 K x TD
typ. < 0.05 %/10 K x TD
< 0.15 % at -40 ... +80 °C (-40 ... +176 °F)
< (0.1 % x TD)/year
-40 ... +80 °C (-40 ... +176 °F)
12) Incl. non-linearity, hysteresis and non-repeatability.
12)
VEGABAR 51 • Profibus PA