Wika DPT-10 User Manual download pdf (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

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 • F oundation Fieldbus

11 Supplement

37246-EN-100120

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Wika DPT-10 User Manual Page 74

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