Performance Characteristics Of Metallic; Process Isolating Diaphragm - Endress+Hauser Cerabar PMP11 Operating Instructions Manual

Technical data
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12.3 Performance characteristics of metallic process
isolating diaphragm
12.3.1 Reference operating conditions
• As per IEC 60770
• Ambient temperature T
• Humidityj= constant, in range: 5 to 80 % rH
• Ambient pressure p = constant, in the range of:860 to 1 060 mbar (12.47 to 15.37 psi)
A
• Position of measuring cell = constant, in range: horizontal ±1° (see also "Influence of the
installation position" section →  15)
• Zero based span
• Process isolating diaphragm material: AISI 316L (1.4435)
• Filling oil: NSF-H1 synthetic oil in accordance with FDA 21 CFR 178.3570
• Supply voltage: 24 V DC ±3 V DC
12.3.2 Measuring uncertainty for small absolute pressure measuring
ranges
The smallest extended uncertainty of measurement that can delivered by our
standards is:
• in range 1 to 30 mbar (0.0145 to 0.435 psi): 0.4 % of reading
• in range < 1 mbar (0.0145 psi): 1 % of reading.
12.3.3 Influence of the installation position
→  15
12.3.4 Resolution
Current output: min. 1.6 μA
12.3.5 Reference accuracy
The reference accuracy contains the non-linearity [DIN EN 61298-2 3.11] including the
pressure hysteresis [DIN EN 61298-23.13] and non-repeatability [DIN EN 61298-2 3.11]
in accordance with the limit point method as per [DIN EN 60770].
Device TD
PMP11 TD 1:1 to TD 5:1
PMP21 TD 1:1 to TD 5:1
PMP23 TD 1:1 to TD 5:1
12.3.6 Thermal change of the zero output and the output span
Measuring cell –20 to +85 °C (–4 to +185 °F)
% of URL for TD 1:1
<1 bar (15 psi) <1
≥ 1 bar (15 psi) <0.8
= constant, in the range of:+21 to +33 °C (+70 to +91 °F)
A
% of the URV Typical non-linearity
±0.5 Under development
±0.3 Under development
±0.3 Under development
Cerabar PMP11, PMP21, PMP23
Typical non-repeatability
Under development
Under development
Under development
–40 to –20 °C (–40 to –4 °F)
+85 to +100 °C (+185 to +212 °F)
<1.2
<1
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