PMP71 datasheet(39/124 Pages) EH

39 / 124 page

Cerabar S PMC71, PMP71, PMP75

Endress+Hauser

Performance characteristics - calculation example and

additional information

Calculating the

total performance in 4 steps

Data (example with PMP71)

Measuring Conditions / Device configuration

Measuring range (URV)

5 bar (75 psi)

Min./max. temp. of pressure transmitter

(ambient/process)

Ambient temp.:0 to 45 °C (32 to 113 °F)

Max. process temp.: 50 °C (122 °F)

Membrane material

AISI 316L

Reference accuracy (± 0.05%)

Standard

PMP71 - Suitable measuring cell

(upper range limit, URL)

10 bar (150 psi) with TD 2:1

Output Signal

4 to 20 mA

Formula

Total performance = ± √ ( (E1)² + (E2)² )

E1 = Reference accuracy →  29

E2 = Ambient temperature effect per 28°C (per 50°F) →  31

Calculation

Step 1: Calculation of the turn down →  7

Turn down, TD = URL / [URV]

10 bar (150 psi)/5 bar (75 psi)

TD = 2:1

Step 2: Calculation of the reference accuracy (E1) →  29

For the measuring conditions,

Reference accuracy, E1

± 0.05 (% of the set span)

± (0.05/100) · 5 bar (75 psi)

±0.0025 bar (0.03625 psi)

E1 =

± 0.05 (% of the set span)

(or)

±0.0025 bar (0.03625 psi)

PMP71 Datasheet(PDF) 39 Page - Endress+Hauser Group Services AG

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