Endress+Hauser Cerabar PMC11 - Performance Characteristics of Ceramic Process Isolating Diaphragm

Cerabar PMC11, PMC21, PMP11, PMP21, PMP23 Technical data
Endress+Hauser 37
12.3 Performance characteristics of ceramic process
isolating diaphragm
12.3.1 Reference operating conditions
• As per IEC 60770
• Ambient temperature T
A
= constant, in the range of:+21 to +33 °C (+70 to +91 °F)
• Humidity φ = constant, in the range of 5 to 80 % rH
• Ambient pressure p
A
= constant, in the range of:860 to 1 060 mbar (12.47 to 15.37 psi)
• Position of measuring cell = constant, in range: horizontal ±1° (see also "Influence of the
installation position" section →  16)
• Zero based span
• Material of process isolating diaphragm: Al
2
O
3
(aluminum-oxide ceramic, Ceraphire
®
)
• Supply voltage: 24 V DC ±3 V DC
• Load: 320 Ω (at 4 to 20 mA output)
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
→  16
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 % of the calibrated span to the maximum turn down
Reference accuracy Non-linearity
1)
Non-repeatability
PMC11
2)
±0.5 ±0.1 ±0.1
PMC21 ±0.3 ±0.1 ±0.1
1) The non-linearity for the 40 bar (600 psi) sensor can be up to ± 0.15% of the calibrated span up to the
maximum turn down.
2) For devices with 0 to 10 V output, a non-linearity of up to max. 0.3 V can occur for signal values below
0.03 V.