VEGA VEGABAR 61 Foundation Fieldbus - Manual (Page 57)

Thermal change zero zignal, reference temperature 20 °C (68 °F):
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In the compensated temperature range
0 … +100 °C (+32 … +212 °F) < 0.05 %/10 K x TD
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Outside the compensated temperature
range typ. < 0.05 %/10 K x TD
Applies also to instruments with analogue 4 … 20 mA current output and refers to the set span.
Thermal change, current output < 0.15 % at -40 … +80 °C (-40 … +176 °F)
Long-term stability (similar to DIN 16086, DINV 19259-1 and IEC 60770-1)
Applies 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) = nominal
measuring range/set span.
Long-term drift of the zero signal < (0.1 % x TD)/year
Ambient conditions
Ambient, storage and transport temperature
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Standard version -40 … +80 °C (-40 … +176 °F)
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Version for oxygen applications 13) -40 … +60 °C (-40 … +140 °F)
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Versions IP 66/IP 68, 1 bar and IP 68, PE
connection cable -20 … +60 °C (-4 … +140 °F)
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Versions IP 66/IP 68, 1 bar and IP 68,
PUR connection cable -20 … +80 °C (-4 … +176 °F)
Additional temperature influence by isolating diaphragm
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 isolating diaphragm in mbar/10 K with
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Flange DN 25 PN 40, Form C, DIN 2501 4.8
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Flange DN 40 PN 40, Form C, DIN 2501 1
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Flange DN 50 PN 40, Form C, DIN 2501 2
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Flange DN 50 PN 40 with extension
50 mm 1.9
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Flange DN 50 PN 40 with extension
100 mm 1.9
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Flange DN 50 PN 40 with extension
200 mm 2.1
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Flange DN 80 PN 40, Form C, DIN 2501 0.4
13) Up to 60 °C (140 °F).
VEGABAR 61 • Foundation Fieldbus 57
10 Supplement
28258
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EN
-081209