Cerabar M PMC71B

Summary

Product identification

• Product name: Cerabar PMC71B
• Document title: Cerabar PMC71B
• Document number: TI01507P/00/EN/08.24-00
• Order number: 71647842

Applications

• Process pressure and level measurement in liquids or gases.
• Pressure measuring ranges: up to 40 bar (600 psi).
• Completely vacuum resistant: up to +150 °C (302 °F) process temperature.
• Accuracy: up to ±0.025%.

Key Features and Advantages

• Robust pressure transmitter with ceramic process membrane (Ceraphire®).
• Easy local or remote operation.
• Condition-based maintenance enabled.
• Smart safety features.
• Intuitive wizard navigation for commissioning and verification.
• Bluetooth connectivity for safe and remote operation (optional).
• Large display with backlight for excellent readability.
• Heartbeat Technology for on-demand verification and monitoring.
• Integrated membrane breakage diagnostic.
• High overload resistance, chemical durability, abrasion resistance, and mechanical durability due to ultrapure 99.9 % ceramic.
• Suitable for vacuum applications.
• Secondary containment for enhanced integrity.

Measuring principle

• Pressure acts directly on the ceramic membrane, causing deflection.
• Pressure-dependent change in capacitance is measured at electrodes.
• Measuring range determined by the thickness of the ceramic membrane.

Measuring System

• Level measurement: Calculation of height (h) using pressure (p), density (ρ), and gravitational acceleration (g).
• Enables volume and mass measurements in any vessel shape with a programmable characteristic curve.
• Suitable for applications with foam, agitators, screen fittings, or liquid gases.

Communication and Data Processing

• Output signals:
  • 4 to 20 mA with HART communication protocol (2-wire).
  • PROFINET with Ethernet-APL communication protocol (10BASE-T1L, 2-wire, 10 Mbit/s).
  • Bluetooth (optional).
• IT Security: Features include hardware write protection switch, access codes, and password protection for parameter access.
• Web Server: Integrated for operation and configuration via web browser and PROFINET. Supports data export (PDF), GSDML download, and network parameter configuration.

Input

• Measured variable: Absolute pressure, Gauge pressure.
• Measuring range: Tables provided for Absolute and Gauge pressure with various measuring cells (e.g., Platinum) and corresponding maximum measuring ranges, smallest calibratable spans, MWP, and OPL.
  • Absolute pressure ranges from 100 mbar up to 40 bar.
  • Gauge pressure ranges from -0.1 to +0.1 bar up to -1 to +40 bar.
• Turn down (TD): Up to 100:1 can be configured.

Output

• Output signal:
  • Current output: 4 to 20 mA with HART. Options for operating modes: 4.0 to 20.5 mA, NAMUR NE 43 (3.8 to 20.5 mA, factory setting), US mode (3.9 to 20.8 mA).
  • PROFINET with Ethernet-APL: 10BASE-T1L, 10 Mbit/s.
• Signal on alarm: In accordance with NAMUR recommendation NE 43. Options for max alarm (21.5 to 23 mA) or min alarm (< 3.6 mA, factory setting).
• Load: Maximum load resistance depends on supply voltage. For handheld terminal or PC operation, a minimum communication resistance of 250 Ω must be considered.
• Damping: Adjustable from 0 to 999 seconds for all outputs and display. Factory setting: 1 s.
• Linearization: User-defined linearization tables of up to 32 value pairs can be entered.

Performance Characteristics

• Response time:
  • HART: Acyclic min. 330 ms, typical 590 ms. Cyclic (burst) min. 160 ms, typical 350 ms.
  • PROFINET with Ethernet-APL: Cyclic min. 32 ms.
• Reference operating conditions: As per IEC 62828-2, with specific ambient temperature, humidity, and pressure ranges.
• Total performance: Combination of reference accuracy and temperature effect.
• Reference accuracy [E1]: Tables provided for Gauge and Absolute pressure measuring cells (Standard and Platinum) with varying turn-down ratios.
  • Standard gauge pressure cells can achieve ±0.075 % accuracy.
  • Platinum gauge pressure cells can achieve ±0.05 % accuracy at TD 1:1.
• Temperature effect [E2]: Specifies main and electronics temperature errors for different measuring cell sizes and temperature ranges.
  • For 1 bar to 40 bar cells (Standard/Platinum): ± (0.065 % · TD + 0.02 %).
  • High-temperature version: higher temperature errors specified for different ranges.
• Resolution: Current output: < 1 μA.
• Long-term stability:
  • Gauge pressure: ± 0.05 % (1 year) to ± 0.10 % (10 years).
  • Absolute pressure: ± 0.05 % (1 year) to ± 0.20 % (10 years).
• Response time T63 and T90:
  • Dead time (t1): maximum 50 ms.
  • Time constant T63 (t2): maximum 85 ms.
  • Time constant T90 (t3): maximum 200 ms.
• Warm-up time (IEC62828-4): ≤ 5 s.

Installation

• Mounting orientation: Position-dependent zero point shift can be corrected.
• Installation instructions: Follow DIN EN837-2 guidelines. Recommended to use shutoff devices, flushing rings, valve manifolds, and to prevent moisture ingress.
• Sensor selection and arrangement: Specific recommendations for mounting in gases, steam, liquids, and for level measurement.
• Mounting bracket: Available for wall or pipe mounting (Ø 1 ¼" to 2").
• Remote sensor: Option to mount the housing separately from the measuring point. Cable lengths available in PE (2m, 5m, 10m) and FEP (5m).

Environment

• Ambient temperature range:
  • Standard: –40 to +85 °C (–40 to +185 °F).
  • With display: Limited optical properties above +60 °C (+140 °F).
  • Separate housing: –20 to +60 °C (–4 to +140 °F).
• Storage temperature: Ranges from –40 to +90 °C (–40 to +194 °F) depending on display and housing type.
• Operating altitude: Up to 5,000 m (16,404 ft).
• Climate class: Class 4K4H satisfied as per DIN EN 60721-3-4.
• Degree of protection:
  • Housing and process connection: IP66/68, TYPE 4X/6P.
  • Cable entries: IP66/68, TYPE 4X/6P for various gland types.
  • M12 plug (when connected): IP66/67 NEMA Type 4X.
• Vibration resistance: See official PDF for tabulated values.
• Electromagnetic compatibility (EMC): Fulfils requirements of IEC / DIN EN 61326-1.

Process

• Process temperature range: See official PDF for tabulated values.
• Thermal shock: See official PDF for tabulated values.
• Process pressure range: Up to 40 bar (600 psi).

Mechanical Construction

• Design, dimensions: See official PDF for detailed drawings and dimensions.
• Weight: See official PDF for tabulated values.
• Materials in contact with process: See official PDF for detailed material specifications.
• Materials not in contact with process: See official PDF for detailed material specifications.

Accessories

• Device-specific accessories are available, including mounting brackets and specific connectors.

Display and User Interface

• Operating concept: Intuitive navigation and operation.
• Local display: Large display with backlight, guarantees excellent readability.

Certificates and Approvals

• CE mark, RCM-Tick marking, Ex approvals, Sanitary compatibility, EAC conformity, Drinking water approval, Marine approval, Radio approval, CRN approval, PED 2014/68/EU, Oxygen application, China RoHS, RoHS.

Ordering Information

• Detailed ordering information and scope of delivery are available in the official PDF.

Disclaimer: Extraction may miss figures, footnotes, or revisions; contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror