Vega VEGABAR 81 Profibus PA - Operating Instructions Bedienungsanleitung PDF herunterladen (Seite 62)

11 Supplement

VEGABAR 81 • Probus PA

45020-EN-131107

Inuence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coecient,

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inuencethroughchemicalseal

The specications 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 coecient 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 coecient of a cooling ele-

ment, depending on the diaphragm-ø

0.1 … 1.5 mbar/10 K

Temperature coecient of a 1 m

long capillary line, depending on the

diaphragm-ø

0.1 … 15 mbar/10 K

Long-term stability (according to DIN 16086 and IEC 60770-1)

Turn down (TD) is the relation nominal measuring range/adjusted span.

Long-term drift of the zero signal

< (0.1 % x TD)/year

Ambient conditions

Version Ambient temperature Storage and transport temper-

ature

Standard version -40 … +80 °C (-40 … +176 °F) -60 … +80 °C (-76 … +176 °F)

Version IP 66/IP 68 (1 bar) -20 … +80 °C (-4 … +176 °F) -20 … +80 °C (-4 … +176 °F)

Version IP 68 (25 bar) with connec-

tion cable PUR

-20 … +80 °C (-4 … +176 °F) -20 … +80 °C (-4 … +176 °F)

Depending on which chemical seal is used, the values can also be higher.

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