WIKA DPT-10 - Manual (Page 74)

Characteristics linear
Position of the measuring cell constant, in the range: horizontal ±1°
Span based on the zero point
Diaphragm material 316L, Alloy C276, gold rhodium plated, Monel
Filling oil Silicone oil
Material, lateral flanges 316L
Influence of the installation position basic
version ≤ 4 mbar 9)10)
A position-dependent zero-point shift can be corrected (see also chapter "General installation
instructions" and "Installation instructions, isolating diaphragm systems").
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 ratio nominal
measuring range/set span.
Reference accuracy - all versions
The following applies to square root extracted characteristics: The accuracy data of DPT10 are
entered with factor 0.5 in the accuracy calculation of the flow.
Reference accuracy - Basic version
10 mbar, 30 mbar measuring cell
-
Turn down 1 : 1 ± 0.15 % of the set span
-
Turn down > 1 : 1 ± 0.15 % of the set span x TD
100 mbar measuring cell
-
Turn down 1 : 1 up to 4 : 1 ± 0.075 % (±0.05 %) of the set span
-
Turn down > 4 : 1 ± (0,012 % x TD + 0.027) of the set span
Measuring cells ≥ 500 mbar
-
Turn down 1 : 1 up to 15 : 1 ± 0.075 % (±0.05 %) of the set span
-
Turn down > 15 : 1 ± (0.0015 % x TD + 0.053) of the set span
Reference accuracy - Isolating diaphragm versions
100 mbar measuring cell
-
Turn down 1 : 1 up to 4 : 1 ± 0.075 % (±0.05 %) of the set span + influence of
the isolating diaphragm
-
Turn down > 4 : 1 ± (0.012 % x TD + 0.027) of the set span + influence
of isolating diaphragm
Measuring cells ≥ 500 mbar
-
Turn down 1 : 1 up to 15 : 1 ± 0.075 % (±0.05 %) of the set span + influence of
the isolating diaphragm
-
Turn down > 15 : 1
9) Instrument is rotated vertically to the diaphragm axis.
10) For instruments with inert oil, the value doubles.
11) Incl. non-linearity, hysteresis and non-repeatability.
74 Differential pressure transmitter DPT10 - metal measuring diaphragm • Foundation Fieldbus
11 Supplement
37246
-EN
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