WIKA DPT-10 - Manual (Page 76)

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 ± (0.0015 % x TD + 0.053) of the set span +
influence of the isolating diaphragm
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.
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.
76 Differential pressure transmitter DPT10 - metal measuring diaphragm • Profibus PA
11 Supplement
37245
-EN
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