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Cerabar PMC11, PMC21, PMP11, PMP21, PMP23
Endress+Hauser
12.4
Performance characteristics of metallic process
isolating diaphragm
12.4.1
Reference operating conditions
• As per IEC 60770
• Ambient temperature T
• Humidity φ = constant, in the range of 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 → 16)
• 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
• Load: 320 Ω (at 4 to 20 mA output)
12.4.2
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.
12.4.3
Influence of the installation position
→ 16
12.4.4
Resolution
Current output: min. 1.6 μA
12.4.5
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
% of the calibrated span to the maximum turn down
Reference accuracy
1)
PMP11
±0.5
PMP21
±0.3
PMP23
±0.3
1)
For devices with 0 to 10 V output, a non-linearity of up to max. 0.3 V can occur for signal values below
0.015 V.
Overview of the turn down ranges → 34
= constant, in the range of:+21 to +33 °C (+70 to +91 °F)
A
Non-linearity
±0.1
±0.1
±0.1
Technical data
Non-repeatability
±0.1
±0.1
±0.1
39
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