VEGA VEGABAR 64 Proﬁbus PA User Manual

Page 56

Inﬂuence of the installation position

0.2 mbar/20 Pa (0.003 psig)

Deviation determined according to the limit point method according to IEC 60770

11)

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) is the relation
nominal measuring range/set span.

Deviation

Turn down 1 : 1 up to 5 : 1

0.075 %

Turn down > 5 : 1

0.015 % x TD

Deviation with absolutely ﬂush process ﬁttings EV, FT

Turn down 1 : 1 up to 5 : 1

0.05 %

Turn down > 5 : 1

0.01 % x TD

Deviation with absolute pressure measuring range 0.1 bar

Turn down 1 : 1 up to 5 : 1

0.25 % x TD

Turn down > 5 : 1

0.05 % x TD

Inﬂuence of the product or ambient temperature
Applies also to instruments with analogue 4 … 20 mA current output and refers to the set span.

Thermal change zero signal and output span, reference temperature 20 °C (68 °F):

In the compensated temperature range
0 … +100 °C (+32 … +212 °F)

< (0.05 % + 0.1 % x TD)

Outside the compensated temperature
range

< (0.05 % + 0.15 % x TD)

Thermal change zero signal and output span with absolute pressure measuring range 0.1 bar,
reference temperature 20 °C (68 °F):

In the compensated temperature range
0 … +100 °C (+32 … +212 °F)

< (0.1 % + 0.1 % x TD)

Outside the compensated temperature
range

< (0.15 % + 0.15 % 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)

Long-term drift of the zero signal

< (0.1 % x TD)/year

Ambient conditions

Ambient, storage and transport temperature

-40 … +80 °C (-40 … +176 °F)

11)

Incl. non-linearity, hysteresis and non-repeatability.

VEGABAR

64 • Proﬁbus PA

10 Supplement

28252

-EN

-081209