VEGA VEGABAR 87 Modbus and Levelmaster protocol - Operating Instructions - Manual (Page 56)

56
10 Supplement
VEGABAR 87 • Modbus and Levelmaster protocol
46297-EN-131107
Damping (63 % of the input variable) 0 … 999 s, adjustable
Additional output parameter - temperature
Processing is made via output signal HART multidrop, Profibus PA, Foundation Fieldbus and
Modbus
Range
-60 … +150 °C (-76 … +302 °F)
Resolution < 0.2 K
Accuracy
Ʋ in the range of 0 … +100 °C
(+32 … +212 °F)
±2 K
Ʋ In the range of -60 … 0 °C
(-76 … +32 °F) and +100 … +150 °C
(+212 … +302 °F)
typ. ±4 K
Reference conditions and actuating 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
Characterstic curve Linear
Reference installation position upright, diaphragm points downward
Influence of the installation position < 0.2 mbar/20 Pa (0.003 psig)
Deviation (according to IEC 60770)
Specifications refer to the set span. Turn down (TD) is the ratio: nominal measuring range/set 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
0.1 % < 0.1 % < 0.02 % 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.
Ceramic/Metal measuring cell - Standard
Medium or ambient temperature T
-40 … 0 °C (-40 … +32 °F)
< {0.15 % + 0.015 %/K x (-T)} x {0.5+0.5 x TD}
0 … 40 °C (+32 … +104 °F) < {0.0075 %/K x (T - 20 °C)} x {0.5+0.5 x TD}
40 … 100 °C (+104 … +212 °F) < {0.15 % } x {0.5+0.5 x TD}
100 … 120 °C (+212 … +248 °F) < {0.15 % + 0.005 %/K x (T - 100 °C)} x {0.5+0.5 x TD}
Ceramic/Metal measuring cell - climate-compensated
Compensated temperature range
0 … +100 °C (+32 … +212 °F)