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56
10 Supplement
VEGABAR 86 • Secondary Device for electronic differential pressure
48048-EN-220817
Damping (63 % of the input variable)
0 … 999 s, adjustable via menu item "
Damping
"
Reference conditions and influencing variables (according to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Ʋ Temperature
+15 … +25 °C (+59 … +77 °F)
Ʋ Relative humidity
45 … 75 %
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
Characteristic curve
Linear
Reference installation position
upright, diaphragm points downward
Influence of the installation position
< 0.2 mbar/20 Pa (0.003 psig)
Deviation in the current output due to
strong, high-frequency electromagnetic
fields acc. to EN 61326-1
< ±150 µA
Deviation (according to IEC 60770-1)
Specifications refer to the set span. Turn down (TD) is the ratio: nominal measuring range/set span.
Accuracy class
Non-linearity, hysteresis and repeata-
bility with TD 1 : 1 up to 5 : 1
Non-linearity, hysteresis and repeata-
bility with 5 : 1
0.1 %
< 0.1 %
< 0.02 % x TD
Influence of the product temperature
Thermal change zero signal and output span
Turn down (TD) is the relation nominal measuring range/adjusted span.
The thermal change of the zero signal and output span corresponds to the value F
T
in chapter "
Calculation of the total deviation (according to DIN 16086)
".
Ceramic measuring cell - Standard
(
F
TBasis
Fig. 25: Basic temperature error F
TBasis
at TD 1 : 1