VEGA VEGABAR 81 Save sensor - Operating Instructions - Manual (Page 44)

44
9 Supplement
VEGABAR 81 • Slave sensor for electronic differential pressure
45049-EN-131011
Nominal range Overload capacity, max.
pressure
Overload capacity, min. pres-
sure
0 … 900 psi 2900 psi 0 psi
0 … +1450 psig
(only for measuring cell ø 28 mm) 2900 psig 0 psi
Reference conditions and actuating variables (according to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Ʋ Temperature +18 … +30 °C (+64 … +86 °F)
Ʋ Relative humidity 45 … 75 %
Ʋ Air pressure 860 … 1060 mbar/86 … 106 kPa (12.5 … 15.4 psi)
Determination of characteristics Limit point adjustment according to IEC 61298-2
Characterstic curve Linear
Reference installation position upright, diaphragm points downward
Influence of the installation position depending on the chemical seal version
Deviation (according to IEC 60770)
Turn down (TD) is the relation nominal measuring range/adjusted span.
Accuracy class Non-linearity, hysteresis and re-
peatability with TD 1 : 1 up to 5 : 1
Non-linearity, hysteresis and re-
peatability with 5 : 1
0.2 % < 0.2 % < 0.04 % x TD
Influence of the product or ambient temperature
Thermal change zero signal and output span
Turn down (TD) is the relation nominal measuring range/adjusted span.
Average temperature coefficient,
zero signal
In the compensated tem-
perature range 10 … +70 °C
(+50 … +158 °F)
Outside the compensated tem-
perature range
Turn down 1 : 1 < 0.05 %/10 K typ. < 0.05 %/10 K
Turn down 1 : 1 up to 5 : 1 < 0.1 %/10 K -
Turn down up to 10 : 1 < 0.15 %/10 K -
Additional temperature influence through chemical seal
The specifications refer to diaphragm material 316L as well as isolating liquid silicone oil. They are
only used for estimation. The actual values depend on the diameter, material and strength of the
diaphragm as well as the isolating liquid. They are available on request.
Temperature coefficient of the chemical seal in mbar/10 K with
Ʋ Flange DN 50 PN 40, Form C,
DIN 2501
1.2 mbar/10 K
Ʋ Flange DN 80 PN 40, Form C,
DIN 2501
0.25 mbar/10 K
Ʋ Flange DN 80 PN 40, Form C,
DIN 2501 with extension 50 mm
1.34 mbar/10 K
Ʋ Flange 2" 150 lbs RF, ANSI B16.5 1.2 mbar/10 K