VEGA VEGADIF 65 4 … 20 mA - Manual (Page 71)

71
10 Supplement
VEGADIF 65 • 4 … 20 mA
36236-EN-130417
Filling oil Silicone oil
Material, lateral flanges 316L
A position-dependent zero-point shift can be corrected (see also chapter "Adjust parameter").
Deviation determined according to the limit point method according to IEC 60770
12)
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 ratio nominal
measuring range/set span.
Deviation - All versions
The following applies to square root extracted characteristics: The accuracy data of VEGADIF 65
are entered with factor 0.5 in the accuracy calculation of the flow.
Deviation - Basic version
10 mbar, 30 mbar measuring cell
Ʋ Turn down 1 : 1 ±0.15 % of the set span
Ʋ Turn down > 1 : 1 ±0.15 % of the set span x TD
100 mbar measuring cell
Ʋ Turn down 1 : 1 to 4 : 1 ±0.075 % of the set span
Ʋ Turn down > 4 : 1 ±(0.012 x TD + 0.027) % of the set span
Measuring cells ≥ 500 mbar
Ʋ Turn down 1 : 1 to 15 : 1 ±0.075 % of the set span
Ʋ Turn down > 15 : 1 ±(0.0015 x TD + 0.053) % of the set span
Deviation - Chemical seal versions
100 mbar measuring cell
Ʋ Turn down 1 : 1 to 4 : 1 ±0.075 % of the set span + influence of the chemical
seal
Ʋ Turn down > 4 : 1 ±(0.012 x TD + 0.027) % of the set span + influence of
the chemical seal
Measuring cells ≥ 500 mbar
Ʋ Turn down 1 : 1 to 15 : 1 ±0.075 % of the set span + influence of the chemical
seal
Ʋ Turn down > 15 : 1 ±(0.0015 % x TD + 0.053 %) of the set span + influence
of the chemical seal
Influence of the product or ambient temperature
Applies to instruments in basic version with digital signal output (HART, Profibus PA, Foundation
Fieldbus) as well as to instruments with analogue current output 4 … 20 mA. Specifications refer
to the set span. Turn down (TD) = nominal measuring range/set span.
12) Incl. non-linearity, hysteresis and non-repeatability.