Performance Characteristics Of Metal Process Isolating Diaphragm - Endress+Hauser IO-Link Ceraphant PTC31B Operating Instructions Manual

Ceraphant PTC31B, PTP31B, PTP33B IO-Link
Endress+Hauser
17.4 Performance characteristics of metal process
isolating diaphragm
17.4.1 Reference operating conditions
• As per IEC 60770
• Ambient temperature T
• Humidity φ = constant, in the range: 5 to 80 % rH
• Ambient pressure p = constant, in the range: 860 to 1 060 mbar (12.47 to 15.37 psi)
A
• Position of measuring cell = constant, in the 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: synthetic oil polyalphaolefin FDA 21 CFR 178.3620, NSF H1
• Supply voltage: 24 V DC ±3 V DC
• Load: 320 Ω (at 4 to 20 mA output)
17.4.2 Measuring uncertainty for small absolute pressure measuring
ranges
The smallest extended uncertainty of measurement that can delivered by our
standards is:
• in the range 1 to 30 mbar (0.0145 to 0.435 psi): 0.4 % of reading
• in the range < 1 mbar (0.0145 psi): 1 % of reading.
17.4.3 Influence of the installation position
→  16
17.4.4 Resolution
Current output: min. 1.6 μA
Display: can be set (factory setting: presentation of the maximum accuracy of the
transmitter)
17.4.5 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
PTP31B - standard ±0.5
PTP31B - platinum ±0.3
PTP33B - standard ±0.5
PTP33B - platinum ±0.3
Overview of the turn down ranges →  79
= constant, in the range: +21 to +33 °C (+70 to +91 °F)
A
Non-linearity
±0.1
±0.1
±0.1
±0.1
Technical data
Non-repeatability
±0.1
±0.1
±0.1
±0.1
85