Vega VEGABAR 87 Operating Instructions Manual page 56

11 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 in the current output due to
strong, high-frequency electromagnetic
fields acc. to EN 61326-1
Deviation (according to IEC 60770-1)
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to the ana-
logue current output 4 ... 20 mA and refers to the set span. Turn down (TD) is the ratio "nominal
measuring range/set span".
The specified values correspond to the value F
Accuracy class
0.1 %
Influence of the medium or ambient temperature
Thermal change zero signal and output span through product temperature
Applies to the digital signal output (HART, Profibus PA, Foundation Fieldbus) as well as to the ana-
logue current output 4 ... 20 mA and refers to the set span. Turn down (TD) is the ratio "nominal
measuring range/set span".
The thermal change of the zero signal and output span corresponds to the value F
"Calculation of the total deviation (according to DIN 16086)".
56
+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)
< ±150 µA
Non-linearity, hysteresis and repeata-
bility with TD 1 : 1 up to 5 : 1
< 0.1 %
in chapter "Calculation of the total deviation".
Kl
Non-linearity, hysteresis and repeata-
bility with 5 : 1
< 0.02 % x TD
in chapter
T
VEGABAR 87 • 4 ... 20 mA