VEGA VEGABAR 64 4 … 20 mA_HART - Manual (Page 57)

Nominal range Overload, max. pressure Overload, min. pressure
0 … 900 psi 2900 psi 0 psi
Reference conditions and actuating variables (similar to DIN EN 60770-1)
R eference conditions according to DIN EN 61298-1
-
T
emperature + 15 … +25 °C (+59 … +77 °F)
-
R elative humidity 45 … 75 %
-
A ir pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psig)
D etermination of characteristics L imit point adjustment according to IEC 61298-2
C
haracteristics linear
R eference installation position upright, diaphragm points downward
I nfluence of the installation position < 0.2 mbar/20 Pa (0.003 psig)
Deviation determined according to the limit point method according to IEC 60770 9)
A pplies 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) is the relation
nominal measuring range/set span.
D eviation
-
T urn down 1 : 1 up to 5 : 1 < 0.075 %
-
T urn down > 5 : 1 < 0.015 % x TD
D eviation with absolutely flush process fittings EV, FT
-
T urn down 1 : 1 up to 5 : 1 < 0.05 %
-
T urn down > 5 : 1 < 0.01 % x TD
D eviation with absolute pressure measuring range 0.1 bar
-
T urn down 1 : 1 up to 5 : 1 < 0.25 % x TD
-
T urn down > 5 : 1 < 0.05 % x TD
Influence of the product or ambient temperature
A
pplies also to instruments with analogue 4 … 20 mA current output and refers to the set span.
T hermal change zero signal and output span, reference temperature 20 °C (68 °F):
-
I n the compensated temperature range
0 … +100 °C (+32 … +212 °F)
< (0.05 % + 0.1 % x TD)
-
O utside the compensated temperature
range
< (0.05 % + 0.15 % x TD)
9) I ncl. non-linearity, hysteresis and non-repeatability.
VEGABAR 64 • 4 … 20 mA/HART 57
10 S upplement
27525
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EN
-081209