VEGA VEGABAR 51 Foundation Fieldbus - Manual (Page 50)

50
10 Supplement
VEGABAR 51 • Foundation Fieldbus
36715-EN-130321
Long-term stability (according to DIN 16086 and IEC 60770-1)
Applies to digital interfaces (HART, Profibus PA, Foundation Fieldbus) as well as to analogue cur-
rent 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
Ʋ Standard version -40 … +80 °C (-40 … +176 °F)
Ʋ Version for oxygen applications 11) -40 … +60 °C (-40 … +140 °F)
Ʋ Versions IP 66/IP 68 (1 bar) and IP 68
(25 bar), connection cable PUR
-20 … +80 °C (-4 … +176 °F)
Ʋ Version IP 66/IP 68 (1 bar), connec-
tion cable PE
-20 … +60 °C (-4 … +140 °F)
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
Ʋ Flange 3" 150 lbs RF, ANSI B16.5 0.25 mbar/10 K
Ʋ Flange 3" 150 lbs RF, ANSI B16.5 with
extension 2 "
1.34 mbar/10 K
Temperature coefficient of a cooling ele-
ment, depending on the diaphragm-ø
0.1 … 1.5 mbar/10 K
Temperature coefficient of a 1 m
long capillary line, depending on the
diaphragm-ø
0.1 … 15 mbar/10 K
Process conditions
The specifications of the pressure stage and product temperature are used as an overview. The
specifications on the type label are applicable.
Pressure stages
Ʋ Thread PN 160 … PN 600
Ʋ Flanges PN 16 … PN 100
Ʋ Hygienic fittings PN 16 … PN 40
11) Up to 60 °C (140 °F).